silverstripe /
silverstripe-framework
| Total Complexity | 137 |
| Total Lines | 1235 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
Complex classes like DataQuery often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use DataQuery, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 21 | class DataQuery |
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| 22 | { |
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| 23 | |||
| 24 | /** |
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| 25 | * @var string |
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| 26 | */ |
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| 27 | protected $dataClass; |
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| 28 | |||
| 29 | /** |
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| 30 | * @var SQLSelect |
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| 31 | */ |
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| 32 | protected $query; |
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| 33 | |||
| 34 | /** |
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| 35 | * Map of all field names to an array of conflicting column SQL |
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| 36 | * |
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| 37 | * E.g. |
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| 38 | * array( |
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| 39 | * 'Title' => array( |
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| 40 | * '"MyTable"."Title"', |
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| 41 | * '"AnotherTable"."Title"', |
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| 42 | * ) |
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| 43 | * ) |
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| 44 | * |
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| 45 | * @var array |
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| 46 | */ |
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| 47 | protected $collidingFields = array(); |
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| 48 | |||
| 49 | /** |
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| 50 | * Allows custom callback to be registered before getFinalisedQuery is called. |
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| 51 | * |
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| 52 | * @var DataQueryManipulator[] |
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| 53 | */ |
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| 54 | protected $dataQueryManipulators = []; |
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| 55 | |||
| 56 | private $queriedColumns = null; |
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| 57 | |||
| 58 | /** |
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| 59 | * @var bool |
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| 60 | */ |
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| 61 | private $queryFinalised = false; |
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|
introduced
by
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| 62 | |||
| 63 | // TODO: replace subclass_access with this |
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| 64 | protected $querySubclasses = true; |
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| 65 | // TODO: replace restrictclasses with this |
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| 66 | protected $filterByClassName = true; |
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| 67 | |||
| 68 | /** |
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| 69 | * Create a new DataQuery. |
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| 70 | * |
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| 71 | * @param string $dataClass The name of the DataObject class that you wish to query |
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| 72 | */ |
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| 73 | public function __construct($dataClass) |
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| 74 | { |
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| 75 | $this->dataClass = $dataClass; |
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| 76 | $this->initialiseQuery(); |
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| 77 | } |
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| 78 | |||
| 79 | /** |
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| 80 | * Clone this object |
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| 81 | */ |
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| 82 | public function __clone() |
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| 83 | { |
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| 84 | $this->query = clone $this->query; |
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| 85 | } |
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| 86 | |||
| 87 | /** |
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| 88 | * Return the {@link DataObject} class that is being queried. |
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| 89 | * |
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| 90 | * @return string |
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| 91 | */ |
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| 92 | public function dataClass() |
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| 93 | { |
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| 94 | return $this->dataClass; |
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| 95 | } |
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| 96 | |||
| 97 | /** |
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| 98 | * Return the {@link SQLSelect} object that represents the current query; note that it will |
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| 99 | * be a clone of the object. |
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| 100 | * |
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| 101 | * @return SQLSelect |
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| 102 | */ |
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| 103 | public function query() |
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| 104 | { |
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| 105 | return $this->getFinalisedQuery(); |
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| 106 | } |
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| 107 | |||
| 108 | |||
| 109 | /** |
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| 110 | * Remove a filter from the query |
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| 111 | * |
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| 112 | * @param string|array $fieldExpression The predicate of the condition to remove |
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| 113 | * (ignoring parameters). The expression will be considered a match if it's |
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| 114 | * contained within any other predicate. |
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| 115 | * @return $this |
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| 116 | */ |
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| 117 | public function removeFilterOn($fieldExpression) |
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| 118 | { |
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| 119 | $matched = false; |
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| 120 | |||
| 121 | // If given a parameterised condition extract only the condition |
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| 122 | if (is_array($fieldExpression)) { |
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| 123 | reset($fieldExpression); |
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| 124 | $fieldExpression = key($fieldExpression); |
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| 125 | } |
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| 126 | |||
| 127 | $where = $this->query->getWhere(); |
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| 128 | // Iterate through each condition |
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| 129 | foreach ($where as $i => $condition) { |
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| 130 | // Rewrite condition groups as plain conditions before comparison |
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| 131 | if ($condition instanceof SQLConditionGroup) { |
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| 132 | $predicate = $condition->conditionSQL($parameters); |
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| 133 | $condition = array($predicate => $parameters); |
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| 134 | } |
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| 135 | |||
| 136 | // As each condition is a single length array, do a single |
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| 137 | // iteration to extract the predicate and parameters |
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| 138 | foreach ($condition as $predicate => $parameters) { |
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| 139 | // @see SQLSelect::addWhere for why this is required here |
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| 140 | if (strpos($predicate, $fieldExpression) !== false) { |
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| 141 | unset($where[$i]); |
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| 142 | $matched = true; |
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| 143 | } |
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| 144 | // Enforce single-item condition predicate => parameters structure |
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| 145 | break; |
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| 146 | } |
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| 147 | } |
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| 148 | |||
| 149 | // set the entire where clause back, but clear the original one first |
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| 150 | if ($matched) { |
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| 151 | $this->query->setWhere($where); |
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| 152 | } else { |
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| 153 | throw new InvalidArgumentException("Couldn't find $fieldExpression in the query filter."); |
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| 154 | } |
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| 155 | |||
| 156 | return $this; |
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| 157 | } |
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| 158 | |||
| 159 | /** |
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| 160 | * Set up the simplest initial query |
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| 161 | */ |
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| 162 | protected function initialiseQuery() |
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| 163 | { |
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| 164 | // Join on base table and let lazy loading join subtables |
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| 165 | $baseClass = DataObject::getSchema()->baseDataClass($this->dataClass()); |
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| 166 | if (!$baseClass) { |
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| 167 | throw new InvalidArgumentException("DataQuery::create() Can't find data classes for '{$this->dataClass}'"); |
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| 168 | } |
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| 169 | |||
| 170 | // Build our intial query |
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| 171 | $this->query = new SQLSelect(array()); |
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| 172 | $this->query->setDistinct(true); |
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| 173 | |||
| 174 | if ($sort = singleton($this->dataClass)->config()->get('default_sort')) { |
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| 175 | $this->sort($sort); |
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| 176 | } |
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| 177 | |||
| 178 | $baseTable = DataObject::getSchema()->tableName($baseClass); |
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| 179 | $this->query->setFrom("\"{$baseTable}\""); |
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| 180 | |||
| 181 | $obj = Injector::inst()->get($baseClass); |
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| 182 | $obj->extend('augmentDataQueryCreation', $this->query, $this); |
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| 183 | } |
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| 184 | |||
| 185 | /** |
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| 186 | * @param array $queriedColumns |
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| 187 | * @return $this |
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| 188 | */ |
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| 189 | public function setQueriedColumns($queriedColumns) |
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| 190 | { |
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| 191 | $this->queriedColumns = $queriedColumns; |
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| 192 | return $this; |
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| 193 | } |
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| 194 | |||
| 195 | /** |
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| 196 | * Ensure that the query is ready to execute. |
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| 197 | * |
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| 198 | * @param array|null $queriedColumns Any columns to filter the query by |
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| 199 | * @return SQLSelect The finalised sql query |
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| 200 | */ |
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| 201 | public function getFinalisedQuery($queriedColumns = null) |
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| 202 | { |
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| 203 | if (!$queriedColumns) { |
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| 204 | $queriedColumns = $this->queriedColumns; |
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| 205 | } |
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| 206 | if ($queriedColumns) { |
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| 207 | $queriedColumns = array_merge($queriedColumns, array('Created', 'LastEdited', 'ClassName')); |
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| 208 | } |
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| 209 | $query = clone $this->query; |
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| 210 | |||
| 211 | // Apply manipulators before finalising query |
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| 212 | foreach ($this->getDataQueryManipulators() as $manipulator) { |
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| 213 | $manipulator->beforeGetFinalisedQuery($this, $queriedColumns, $query); |
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| 214 | } |
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| 215 | |||
| 216 | $schema = DataObject::getSchema(); |
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| 217 | $baseDataClass = $schema->baseDataClass($this->dataClass()); |
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| 218 | $baseIDColumn = $schema->sqlColumnForField($baseDataClass, 'ID'); |
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| 219 | $ancestorClasses = ClassInfo::ancestry($this->dataClass(), true); |
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| 220 | |||
| 221 | // Generate the list of tables to iterate over and the list of columns required |
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| 222 | // by any existing where clauses. This second step is skipped if we're fetching |
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| 223 | // the whole dataobject as any required columns will get selected regardless. |
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| 224 | if ($queriedColumns) { |
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| 225 | // Specifying certain columns allows joining of child tables |
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| 226 | $tableClasses = ClassInfo::dataClassesFor($this->dataClass); |
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| 227 | |||
| 228 | // Ensure that any filtered columns are included in the selected columns |
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| 229 | foreach ($query->getWhereParameterised($parameters) as $where) { |
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| 230 | // Check for any columns in the form '"Column" = ?' or '"Table"."Column"' = ? |
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| 231 | if (preg_match_all( |
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| 232 | '/(?:"(?<table>[^"]+)"\.)?"(?<column>[^"]+)"(?:[^\.]|$)/', |
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| 233 | $where, |
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| 234 | $matches, |
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| 235 | PREG_SET_ORDER |
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| 236 | )) { |
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| 237 | foreach ($matches as $match) { |
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| 238 | $column = $match['column']; |
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| 239 | if (!in_array($column, $queriedColumns)) { |
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| 240 | $queriedColumns[] = $column; |
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| 241 | } |
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| 242 | } |
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| 243 | } |
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| 244 | } |
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| 245 | } else { |
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| 246 | $tableClasses = $ancestorClasses; |
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| 247 | } |
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| 248 | |||
| 249 | // Iterate over the tables and check what we need to select from them. If any selects are made (or the table is |
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| 250 | // required for a select) |
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| 251 | foreach ($tableClasses as $tableClass) { |
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| 252 | // Determine explicit columns to select |
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| 253 | $selectColumns = null; |
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| 254 | if ($queriedColumns) { |
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| 255 | // Restrict queried columns to that on the selected table |
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| 256 | $tableFields = $schema->databaseFields($tableClass, false); |
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| 257 | unset($tableFields['ID']); |
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| 258 | $selectColumns = array_intersect($queriedColumns, array_keys($tableFields)); |
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| 259 | } |
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| 260 | |||
| 261 | // If this is a subclass without any explicitly requested columns, omit this from the query |
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| 262 | if (!in_array($tableClass, $ancestorClasses) && empty($selectColumns)) { |
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| 263 | continue; |
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| 264 | } |
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| 265 | |||
| 266 | // Select necessary columns (unless an explicitly empty array) |
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| 267 | if ($selectColumns !== array()) { |
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| 268 | $this->selectColumnsFromTable($query, $tableClass, $selectColumns); |
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| 269 | } |
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| 270 | |||
| 271 | // Join if not the base table |
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| 272 | if ($tableClass !== $baseDataClass) { |
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| 273 | $tableName = $schema->tableName($tableClass); |
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| 274 | $query->addLeftJoin( |
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| 275 | $tableName, |
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| 276 | "\"{$tableName}\".\"ID\" = {$baseIDColumn}", |
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| 277 | $tableName, |
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| 278 | 10 |
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| 279 | ); |
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| 280 | } |
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| 281 | } |
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| 282 | |||
| 283 | // Resolve colliding fields |
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| 284 | if ($this->collidingFields) { |
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| 285 | foreach ($this->collidingFields as $collisionField => $collisions) { |
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| 286 | $caseClauses = array(); |
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| 287 | foreach ($collisions as $collision) { |
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| 288 | if (preg_match('/^"(?<table>[^"]+)"\./', $collision, $matches)) { |
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| 289 | $collisionTable = $matches['table']; |
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| 290 | $collisionClass = $schema->tableClass($collisionTable); |
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| 291 | if ($collisionClass) { |
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| 292 | $collisionClassColumn = $schema->sqlColumnForField($collisionClass, 'ClassName'); |
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| 293 | $collisionClasses = ClassInfo::subclassesFor($collisionClass); |
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| 294 | $collisionClassesSQL = implode(', ', Convert::raw2sql($collisionClasses, true)); |
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| 295 | $caseClauses[] = "WHEN {$collisionClassColumn} IN ({$collisionClassesSQL}) THEN $collision"; |
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| 296 | } |
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| 297 | } else { |
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| 298 | user_error("Bad collision item '$collision'", E_USER_WARNING); |
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| 299 | } |
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| 300 | } |
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| 301 | $query->selectField("CASE " . implode(" ", $caseClauses) . " ELSE NULL END", $collisionField); |
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| 302 | } |
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| 303 | } |
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| 304 | |||
| 305 | |||
| 306 | if ($this->filterByClassName) { |
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| 307 | // If querying the base class, don't bother filtering on class name |
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| 308 | if ($this->dataClass != $baseDataClass) { |
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| 309 | // Get the ClassName values to filter to |
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| 310 | $classNames = ClassInfo::subclassesFor($this->dataClass); |
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| 311 | $classNamesPlaceholders = DB::placeholders($classNames); |
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| 312 | $baseClassColumn = $schema->sqlColumnForField($baseDataClass, 'ClassName'); |
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| 313 | $query->addWhere(array( |
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| 314 | "{$baseClassColumn} IN ($classNamesPlaceholders)" => $classNames |
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| 315 | )); |
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| 316 | } |
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| 317 | } |
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| 318 | |||
| 319 | // Select ID |
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| 320 | $query->selectField($baseIDColumn, "ID"); |
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| 321 | |||
| 322 | // Select RecordClassName |
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| 323 | $baseClassColumn = $schema->sqlColumnForField($baseDataClass, 'ClassName'); |
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| 324 | $query->selectField( |
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| 325 | " |
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| 326 | CASE WHEN {$baseClassColumn} IS NOT NULL THEN {$baseClassColumn} |
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| 327 | ELSE ".Convert::raw2sql($baseDataClass, true)." END", |
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| 328 | "RecordClassName" |
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| 329 | ); |
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| 330 | |||
| 331 | // TODO: Versioned, Translatable, SiteTreeSubsites, etc, could probably be better implemented as subclasses |
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| 332 | // of DataQuery |
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| 333 | |||
| 334 | $obj = Injector::inst()->get($this->dataClass); |
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| 335 | $obj->extend('augmentSQL', $query, $this); |
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| 336 | |||
| 337 | $this->ensureSelectContainsOrderbyColumns($query); |
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| 338 | |||
| 339 | // Apply post-finalisation manipulations |
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| 340 | foreach ($this->getDataQueryManipulators() as $manipulator) { |
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| 341 | $manipulator->afterGetFinalisedQuery($this, $queriedColumns, $query); |
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| 342 | } |
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| 343 | |||
| 344 | return $query; |
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| 345 | } |
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| 346 | |||
| 347 | /** |
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| 348 | * Ensure that if a query has an order by clause, those columns are present in the select. |
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| 349 | * |
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| 350 | * @param SQLSelect $query |
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| 351 | * @param array $originalSelect |
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| 352 | */ |
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| 353 | protected function ensureSelectContainsOrderbyColumns($query, $originalSelect = array()) |
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| 354 | { |
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| 355 | if ($orderby = $query->getOrderBy()) { |
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| 356 | $newOrderby = array(); |
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| 357 | $i = 0; |
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| 358 | foreach ($orderby as $k => $dir) { |
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| 359 | $newOrderby[$k] = $dir; |
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| 360 | |||
| 361 | // don't touch functions in the ORDER BY or public function calls |
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| 362 | // selected as fields |
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| 363 | if (strpos($k, '(') !== false) { |
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| 364 | continue; |
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| 365 | } |
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| 366 | |||
| 367 | $col = str_replace('"', '', trim($k)); |
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| 368 | $parts = explode('.', $col); |
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| 369 | |||
| 370 | // Pull through SortColumn references from the originalSelect variables |
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| 371 | if (preg_match('/_SortColumn/', $col)) { |
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| 372 | if (isset($originalSelect[$col])) { |
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| 373 | $query->selectField($originalSelect[$col], $col); |
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| 374 | } |
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| 375 | |||
| 376 | continue; |
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| 377 | } |
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| 378 | |||
| 379 | if (count($parts) == 1) { |
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| 380 | // Get expression for sort value |
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| 381 | $qualCol = "\"{$parts[0]}\""; |
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| 382 | $table = DataObject::getSchema()->tableForField($this->dataClass(), $parts[0]); |
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| 383 | if ($table) { |
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| 384 | $qualCol = "\"{$table}\".{$qualCol}"; |
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| 385 | } |
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| 386 | |||
| 387 | // remove original sort |
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| 388 | unset($newOrderby[$k]); |
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| 389 | |||
| 390 | // add new columns sort |
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| 391 | $newOrderby[$qualCol] = $dir; |
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| 392 | |||
| 393 | // To-do: Remove this if block once SQLSelect::$select has been refactored to store getSelect() |
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| 394 | // format internally; then this check can be part of selectField() |
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| 395 | $selects = $query->getSelect(); |
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| 396 | if (!isset($selects[$col]) && !in_array($qualCol, $selects)) { |
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| 397 | $query->selectField($qualCol); |
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| 398 | } |
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| 399 | } else { |
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| 400 | $qualCol = '"' . implode('"."', $parts) . '"'; |
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| 401 | |||
| 402 | if (!in_array($qualCol, $query->getSelect())) { |
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| 403 | unset($newOrderby[$k]); |
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| 404 | |||
| 405 | $newOrderby["\"_SortColumn$i\""] = $dir; |
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| 406 | $query->selectField($qualCol, "_SortColumn$i"); |
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| 407 | |||
| 408 | $i++; |
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| 409 | } |
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| 410 | } |
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| 411 | } |
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| 412 | |||
| 413 | $query->setOrderBy($newOrderby); |
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| 414 | } |
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| 415 | } |
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| 416 | |||
| 417 | /** |
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| 418 | * Execute the query and return the result as {@link SS_Query} object. |
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| 419 | * |
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| 420 | * @return Query |
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| 421 | */ |
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| 422 | public function execute() |
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| 423 | { |
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| 424 | return $this->getFinalisedQuery()->execute(); |
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| 425 | } |
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| 426 | |||
| 427 | /** |
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| 428 | * Return this query's SQL |
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| 429 | * |
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| 430 | * @param array $parameters Out variable for parameters required for this query |
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| 431 | * @return string The resulting SQL query (may be paramaterised) |
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| 432 | */ |
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| 433 | public function sql(&$parameters = array()) |
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| 434 | { |
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| 435 | return $this->getFinalisedQuery()->sql($parameters); |
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| 436 | } |
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| 437 | |||
| 438 | /** |
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| 439 | * Return the number of records in this query. |
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| 440 | * Note that this will issue a separate SELECT COUNT() query. |
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| 441 | * |
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| 442 | * @return int |
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| 443 | */ |
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| 444 | public function count() |
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| 445 | { |
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| 446 | $quotedColumn = DataObject::getSchema()->sqlColumnForField($this->dataClass(), 'ID'); |
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| 447 | return $this->getFinalisedQuery()->count("DISTINCT {$quotedColumn}"); |
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| 448 | } |
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| 449 | |||
| 450 | /** |
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| 451 | * Return the maximum value of the given field in this DataList |
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| 452 | * |
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| 453 | * @param string $field Unquoted database column name. Will be ANSI quoted |
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| 454 | * automatically so must not contain double quotes. |
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| 455 | * @return string |
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| 456 | */ |
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| 457 | public function max($field) |
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| 458 | { |
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| 459 | $table = DataObject::getSchema()->tableForField($this->dataClass, $field); |
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| 460 | if (!$table) { |
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| 461 | return $this->aggregate("MAX(\"$field\")"); |
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| 462 | } |
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| 463 | return $this->aggregate("MAX(\"$table\".\"$field\")"); |
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| 464 | } |
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| 465 | |||
| 466 | /** |
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| 467 | * Return the minimum value of the given field in this DataList |
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| 468 | * |
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| 469 | * @param string $field Unquoted database column name. Will be ANSI quoted |
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| 470 | * automatically so must not contain double quotes. |
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| 471 | * @return string |
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| 472 | */ |
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| 473 | public function min($field) |
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| 474 | { |
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| 475 | $table = DataObject::getSchema()->tableForField($this->dataClass, $field); |
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| 476 | if (!$table) { |
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| 477 | return $this->aggregate("MIN(\"$field\")"); |
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| 478 | } |
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| 479 | return $this->aggregate("MIN(\"$table\".\"$field\")"); |
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| 480 | } |
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| 481 | |||
| 482 | /** |
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| 483 | * Return the average value of the given field in this DataList |
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| 484 | * |
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| 485 | * @param string $field Unquoted database column name. Will be ANSI quoted |
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| 486 | * automatically so must not contain double quotes. |
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| 487 | * @return string |
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| 488 | */ |
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| 489 | public function avg($field) |
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| 490 | { |
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| 491 | $table = DataObject::getSchema()->tableForField($this->dataClass, $field); |
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| 492 | if (!$table) { |
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| 493 | return $this->aggregate("AVG(\"$field\")"); |
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| 494 | } |
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| 495 | return $this->aggregate("AVG(\"$table\".\"$field\")"); |
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| 496 | } |
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| 497 | |||
| 498 | /** |
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| 499 | * Return the sum of the values of the given field in this DataList |
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| 500 | * |
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| 501 | * @param string $field Unquoted database column name. Will be ANSI quoted |
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| 502 | * automatically so must not contain double quotes. |
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| 503 | * @return string |
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| 504 | */ |
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| 505 | public function sum($field) |
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| 506 | { |
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| 507 | $table = DataObject::getSchema()->tableForField($this->dataClass, $field); |
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| 508 | if (!$table) { |
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| 509 | return $this->aggregate("SUM(\"$field\")"); |
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| 510 | } |
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| 511 | return $this->aggregate("SUM(\"$table\".\"$field\")"); |
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| 512 | } |
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| 513 | |||
| 514 | /** |
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| 515 | * Runs a raw aggregate expression. Please handle escaping yourself |
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| 516 | * |
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| 517 | * @param string $expression An aggregate expression, such as 'MAX("Balance")', or a set of them |
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| 518 | * (as an escaped SQL statement) |
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| 519 | * @return string |
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| 520 | */ |
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| 521 | public function aggregate($expression) |
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| 522 | { |
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| 523 | return $this->getFinalisedQuery()->aggregate($expression)->execute()->value(); |
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| 524 | } |
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| 525 | |||
| 526 | /** |
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| 527 | * Return the first row that would be returned by this full DataQuery |
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| 528 | * Note that this will issue a separate SELECT ... LIMIT 1 query. |
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| 529 | * |
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| 530 | * @return SQLSelect |
||
| 531 | */ |
||
| 532 | public function firstRow() |
||
| 533 | { |
||
| 534 | return $this->getFinalisedQuery()->firstRow(); |
||
| 535 | } |
||
| 536 | |||
| 537 | /** |
||
| 538 | * Return the last row that would be returned by this full DataQuery |
||
| 539 | * Note that this will issue a separate SELECT ... LIMIT query. |
||
| 540 | * |
||
| 541 | * @return SQLSelect |
||
| 542 | */ |
||
| 543 | public function lastRow() |
||
| 544 | { |
||
| 545 | return $this->getFinalisedQuery()->lastRow(); |
||
| 546 | } |
||
| 547 | |||
| 548 | /** |
||
| 549 | * Update the SELECT clause of the query with the columns from the given table |
||
| 550 | * |
||
| 551 | * @param SQLSelect $query |
||
| 552 | * @param string $tableClass Class to select from |
||
| 553 | * @param array $columns |
||
| 554 | */ |
||
| 555 | protected function selectColumnsFromTable(SQLSelect &$query, $tableClass, $columns = null) |
||
| 556 | { |
||
| 557 | // Add SQL for multi-value fields |
||
| 558 | $schema = DataObject::getSchema(); |
||
| 559 | $databaseFields = $schema->databaseFields($tableClass, false); |
||
| 560 | $compositeFields = $schema->compositeFields($tableClass, false); |
||
| 561 | unset($databaseFields['ID']); |
||
| 562 | foreach ($databaseFields as $k => $v) { |
||
| 563 | if ((is_null($columns) || in_array($k, $columns)) && !isset($compositeFields[$k])) { |
||
| 564 | // Update $collidingFields if necessary |
||
| 565 | $expressionForField = $query->expressionForField($k); |
||
| 566 | $quotedField = $schema->sqlColumnForField($tableClass, $k); |
||
| 567 | if ($expressionForField) { |
||
| 568 | if (!isset($this->collidingFields[$k])) { |
||
| 569 | $this->collidingFields[$k] = array($expressionForField); |
||
| 570 | } |
||
| 571 | $this->collidingFields[$k][] = $quotedField; |
||
| 572 | } else { |
||
| 573 | $query->selectField($quotedField, $k); |
||
| 574 | } |
||
| 575 | } |
||
| 576 | } |
||
| 577 | foreach ($compositeFields as $k => $v) { |
||
| 578 | if ((is_null($columns) || in_array($k, $columns)) && $v) { |
||
| 579 | $tableName = $schema->tableName($tableClass); |
||
| 580 | $dbO = Injector::inst()->create($v, $k); |
||
| 581 | $dbO->setTable($tableName); |
||
| 582 | $dbO->addToQuery($query); |
||
| 583 | } |
||
| 584 | } |
||
| 585 | } |
||
| 586 | |||
| 587 | /** |
||
| 588 | * Append a GROUP BY clause to this query. |
||
| 589 | * |
||
| 590 | * @param string $groupby Escaped SQL statement |
||
| 591 | * @return $this |
||
| 592 | */ |
||
| 593 | public function groupby($groupby) |
||
| 594 | { |
||
| 595 | $this->query->addGroupBy($groupby); |
||
| 596 | return $this; |
||
| 597 | } |
||
| 598 | |||
| 599 | /** |
||
| 600 | * Append a HAVING clause to this query. |
||
| 601 | * |
||
| 602 | * @param string $having Escaped SQL statement |
||
| 603 | * @return $this |
||
| 604 | */ |
||
| 605 | public function having($having) |
||
| 606 | { |
||
| 607 | $this->query->addHaving($having); |
||
| 608 | return $this; |
||
| 609 | } |
||
| 610 | |||
| 611 | /** |
||
| 612 | * Create a disjunctive subgroup. |
||
| 613 | * |
||
| 614 | * That is a subgroup joined by OR |
||
| 615 | * |
||
| 616 | * @return DataQuery_SubGroup |
||
| 617 | */ |
||
| 618 | public function disjunctiveGroup() |
||
| 619 | { |
||
| 620 | return new DataQuery_SubGroup($this, 'OR'); |
||
| 621 | } |
||
| 622 | |||
| 623 | /** |
||
| 624 | * Create a conjunctive subgroup |
||
| 625 | * |
||
| 626 | * That is a subgroup joined by AND |
||
| 627 | * |
||
| 628 | * @return DataQuery_SubGroup |
||
| 629 | */ |
||
| 630 | public function conjunctiveGroup() |
||
| 631 | { |
||
| 632 | return new DataQuery_SubGroup($this, 'AND'); |
||
| 633 | } |
||
| 634 | |||
| 635 | /** |
||
| 636 | * Adds a WHERE clause. |
||
| 637 | * |
||
| 638 | * @see SQLSelect::addWhere() for syntax examples, although DataQuery |
||
| 639 | * won't expand multiple arguments as SQLSelect does. |
||
| 640 | * |
||
| 641 | * @param string|array|SQLConditionGroup $filter Predicate(s) to set, as escaped SQL statements or |
||
| 642 | * paramaterised queries |
||
| 643 | * @return $this |
||
| 644 | */ |
||
| 645 | public function where($filter) |
||
| 646 | { |
||
| 647 | if ($filter) { |
||
| 648 | $this->query->addWhere($filter); |
||
| 649 | } |
||
| 650 | return $this; |
||
| 651 | } |
||
| 652 | |||
| 653 | /** |
||
| 654 | * Append a WHERE with OR. |
||
| 655 | * |
||
| 656 | * @see SQLSelect::addWhere() for syntax examples, although DataQuery |
||
| 657 | * won't expand multiple method arguments as SQLSelect does. |
||
| 658 | * |
||
| 659 | * @param string|array|SQLConditionGroup $filter Predicate(s) to set, as escaped SQL statements or |
||
| 660 | * paramaterised queries |
||
| 661 | * @return $this |
||
| 662 | */ |
||
| 663 | public function whereAny($filter) |
||
| 664 | { |
||
| 665 | if ($filter) { |
||
| 666 | $this->query->addWhereAny($filter); |
||
| 667 | } |
||
| 668 | return $this; |
||
| 669 | } |
||
| 670 | |||
| 671 | /** |
||
| 672 | * Set the ORDER BY clause of this query |
||
| 673 | * |
||
| 674 | * @see SQLSelect::orderby() |
||
| 675 | * |
||
| 676 | * @param string $sort Column to sort on (escaped SQL statement) |
||
| 677 | * @param string $direction Direction ("ASC" or "DESC", escaped SQL statement) |
||
| 678 | * @param bool $clear Clear existing values |
||
| 679 | * @return $this |
||
| 680 | */ |
||
| 681 | public function sort($sort = null, $direction = null, $clear = true) |
||
| 682 | { |
||
| 683 | if ($clear) { |
||
| 684 | $this->query->setOrderBy($sort, $direction); |
||
| 685 | } else { |
||
| 686 | $this->query->addOrderBy($sort, $direction); |
||
| 687 | } |
||
| 688 | |||
| 689 | return $this; |
||
| 690 | } |
||
| 691 | |||
| 692 | /** |
||
| 693 | * Reverse order by clause |
||
| 694 | * |
||
| 695 | * @return $this |
||
| 696 | */ |
||
| 697 | public function reverseSort() |
||
| 698 | { |
||
| 699 | $this->query->reverseOrderBy(); |
||
| 700 | return $this; |
||
| 701 | } |
||
| 702 | |||
| 703 | /** |
||
| 704 | * Set the limit of this query. |
||
| 705 | * |
||
| 706 | * @param int $limit |
||
| 707 | * @param int $offset |
||
| 708 | * @return $this |
||
| 709 | */ |
||
| 710 | public function limit($limit, $offset = 0) |
||
| 711 | { |
||
| 712 | $this->query->setLimit($limit, $offset); |
||
| 713 | return $this; |
||
| 714 | } |
||
| 715 | |||
| 716 | /** |
||
| 717 | * Set whether this query should be distinct or not. |
||
| 718 | * |
||
| 719 | * @param bool $value |
||
| 720 | * @return $this |
||
| 721 | */ |
||
| 722 | public function distinct($value) |
||
| 723 | { |
||
| 724 | $this->query->setDistinct($value); |
||
| 725 | return $this; |
||
| 726 | } |
||
| 727 | |||
| 728 | /** |
||
| 729 | * Add an INNER JOIN clause to this query. |
||
| 730 | * |
||
| 731 | * @param string $table The unquoted table name to join to. |
||
| 732 | * @param string $onClause The filter for the join (escaped SQL statement) |
||
| 733 | * @param string $alias An optional alias name (unquoted) |
||
| 734 | * @param int $order A numerical index to control the order that joins are added to the query; lower order values |
||
| 735 | * will cause the query to appear first. The default is 20, and joins created automatically by the |
||
| 736 | * ORM have a value of 10. |
||
| 737 | * @param array $parameters Any additional parameters if the join is a parameterised subquery |
||
| 738 | * @return $this |
||
| 739 | */ |
||
| 740 | public function innerJoin($table, $onClause, $alias = null, $order = 20, $parameters = array()) |
||
| 741 | { |
||
| 742 | if ($table) { |
||
| 743 | $this->query->addInnerJoin($table, $onClause, $alias, $order, $parameters); |
||
| 744 | } |
||
| 745 | return $this; |
||
| 746 | } |
||
| 747 | |||
| 748 | /** |
||
| 749 | * Add a LEFT JOIN clause to this query. |
||
| 750 | * |
||
| 751 | * @param string $table The unquoted table to join to. |
||
| 752 | * @param string $onClause The filter for the join (escaped SQL statement). |
||
| 753 | * @param string $alias An optional alias name (unquoted) |
||
| 754 | * @param int $order A numerical index to control the order that joins are added to the query; lower order values |
||
| 755 | * will cause the query to appear first. The default is 20, and joins created automatically by the |
||
| 756 | * ORM have a value of 10. |
||
| 757 | * @param array $parameters Any additional parameters if the join is a parameterised subquery |
||
| 758 | * @return $this |
||
| 759 | */ |
||
| 760 | public function leftJoin($table, $onClause, $alias = null, $order = 20, $parameters = array()) |
||
| 761 | { |
||
| 762 | if ($table) { |
||
| 763 | $this->query->addLeftJoin($table, $onClause, $alias, $order, $parameters); |
||
| 764 | } |
||
| 765 | return $this; |
||
| 766 | } |
||
| 767 | |||
| 768 | /** |
||
| 769 | * Prefix of all joined table aliases. E.g. ->filter('Banner.Image.Title)' |
||
| 770 | * Will join the Banner, and then Image relations |
||
| 771 | * `$relationPrefx` will be `banner_image_` |
||
| 772 | * Each table in the Image chain will be suffixed to this prefix. E.g. |
||
| 773 | * `banner_image_File` and `banner_image_Image` |
||
| 774 | * |
||
| 775 | * This will be null if no relation is joined. |
||
| 776 | * E.g. `->filter('Title')` |
||
| 777 | * |
||
| 778 | * @param string|array $relation Relation in '.' delimited string, or array of parts |
||
| 779 | * @return string Table prefix |
||
| 780 | */ |
||
| 781 | public static function applyRelationPrefix($relation) |
||
| 782 | { |
||
| 783 | if (!$relation) { |
||
| 784 | return null; |
||
| 785 | } |
||
| 786 | if (is_string($relation)) { |
||
| 787 | $relation = explode(".", $relation); |
||
| 788 | } |
||
| 789 | return strtolower(implode('_', $relation)) . '_'; |
||
| 790 | } |
||
| 791 | |||
| 792 | /** |
||
| 793 | * Traverse the relationship fields, and add the table |
||
| 794 | * mappings to the query object state. This has to be called |
||
| 795 | * in any overloaded {@link SearchFilter->apply()} methods manually. |
||
| 796 | * |
||
| 797 | * Note, that in order to filter against the joined relation user code must |
||
| 798 | * use {@see tablePrefix()} to get the table alias used for this relation. |
||
| 799 | * |
||
| 800 | * @param string|array $relation The array/dot-syntax relation to follow |
||
| 801 | * @param bool $linearOnly Set to true to restrict to linear relations only. Set this |
||
| 802 | * if this relation will be used for sorting, and should not include duplicate rows. |
||
| 803 | * @return string The model class of the related item |
||
| 804 | */ |
||
| 805 | public function applyRelation($relation, $linearOnly = false) |
||
| 806 | { |
||
| 807 | // NO-OP |
||
| 808 | if (!$relation) { |
||
| 809 | return $this->dataClass; |
||
| 810 | } |
||
| 811 | |||
| 812 | if (is_string($relation)) { |
||
| 813 | $relation = explode(".", $relation); |
||
| 814 | } |
||
| 815 | |||
| 816 | $modelClass = $this->dataClass; |
||
| 817 | |||
| 818 | $schema = DataObject::getSchema(); |
||
| 819 | $currentRelation = []; |
||
| 820 | foreach ($relation as $rel) { |
||
| 821 | // Get prefix for join for this table (and parent to join on) |
||
| 822 | $parentPrefix = $this->applyRelationPrefix($currentRelation); |
||
| 823 | $currentRelation[] = $rel; |
||
| 824 | $tablePrefix = $this->applyRelationPrefix($currentRelation); |
||
| 825 | |||
| 826 | // Check has_one |
||
| 827 | if ($component = $schema->hasOneComponent($modelClass, $rel)) { |
||
| 828 | // Join via has_one |
||
| 829 | $this->joinHasOneRelation($modelClass, $rel, $component, $parentPrefix, $tablePrefix); |
||
| 830 | $modelClass = $component; |
||
| 831 | continue; |
||
| 832 | } |
||
| 833 | |||
| 834 | // Check has_many |
||
| 835 | if ($component = $schema->hasManyComponent($modelClass, $rel)) { |
||
| 836 | // Fail on non-linear relations |
||
| 837 | if ($linearOnly) { |
||
| 838 | throw new InvalidArgumentException("$rel is not a linear relation on model $modelClass"); |
||
| 839 | } |
||
| 840 | // Join via has_many |
||
| 841 | $this->joinHasManyRelation($modelClass, $rel, $component, $parentPrefix, $tablePrefix, 'has_many'); |
||
| 842 | $modelClass = $component; |
||
| 843 | continue; |
||
| 844 | } |
||
| 845 | |||
| 846 | // check belongs_to (like has_many but linear safe) |
||
| 847 | if ($component = $schema->belongsToComponent($modelClass, $rel)) { |
||
| 848 | // Piggy back off has_many logic |
||
| 849 | $this->joinHasManyRelation($modelClass, $rel, $component, $parentPrefix, $tablePrefix, 'belongs_to'); |
||
| 850 | $modelClass = $component; |
||
| 851 | continue; |
||
| 852 | } |
||
| 853 | |||
| 854 | // Check many_many |
||
| 855 | if ($component = $schema->manyManyComponent($modelClass, $rel)) { |
||
| 856 | // Fail on non-linear relations |
||
| 857 | if ($linearOnly) { |
||
| 858 | throw new InvalidArgumentException("$rel is not a linear relation on model $modelClass"); |
||
| 859 | } |
||
| 860 | $this->joinManyManyRelationship( |
||
| 861 | $component['relationClass'], |
||
| 862 | $component['parentClass'], |
||
| 863 | $component['childClass'], |
||
| 864 | $component['parentField'], |
||
| 865 | $component['childField'], |
||
| 866 | $component['join'], |
||
| 867 | $parentPrefix, |
||
| 868 | $tablePrefix |
||
| 869 | ); |
||
| 870 | $modelClass = $component['childClass']; |
||
| 871 | continue; |
||
| 872 | } |
||
| 873 | |||
| 874 | // no relation |
||
| 875 | throw new InvalidArgumentException("$rel is not a relation on model $modelClass"); |
||
| 876 | } |
||
| 877 | |||
| 878 | return $modelClass; |
||
| 879 | } |
||
| 880 | |||
| 881 | /** |
||
| 882 | * Join the given has_many relation to this query. |
||
| 883 | * Also works with belongs_to |
||
| 884 | * |
||
| 885 | * Doesn't work with polymorphic relationships |
||
| 886 | * |
||
| 887 | * @param string $localClass Name of class that has the has_many to the joined class |
||
| 888 | * @param string $localField Name of the has_many relationship to join |
||
| 889 | * @param string $foreignClass Class to join |
||
| 890 | * @param string $localPrefix Table prefix for parent class |
||
| 891 | * @param string $foreignPrefix Table prefix to use |
||
| 892 | * @param string $type 'has_many' or 'belongs_to' |
||
| 893 | */ |
||
| 894 | protected function joinHasManyRelation( |
||
| 895 | $localClass, |
||
| 896 | $localField, |
||
| 897 | $foreignClass, |
||
| 898 | $localPrefix = null, |
||
| 899 | $foreignPrefix = null, |
||
| 900 | $type = 'has_many' |
||
| 901 | ) { |
||
| 902 | if (!$foreignClass || $foreignClass === DataObject::class) { |
||
| 903 | throw new InvalidArgumentException("Could not find a has_many relationship {$localField} on {$localClass}"); |
||
| 904 | } |
||
| 905 | $schema = DataObject::getSchema(); |
||
| 906 | |||
| 907 | // Skip if already joined |
||
| 908 | // Note: don't just check base class, since we need to join on the table with the actual relation key |
||
| 909 | $foreignTable = $schema->tableName($foreignClass); |
||
| 910 | $foreignTableAliased = $foreignPrefix . $foreignTable; |
||
| 911 | if ($this->query->isJoinedTo($foreignTableAliased)) { |
||
| 912 | return; |
||
| 913 | } |
||
| 914 | |||
| 915 | // Join table with associated has_one |
||
| 916 | /** @var DataObject $model */ |
||
| 917 | $foreignKey = $schema->getRemoteJoinField($localClass, $localField, $type, $polymorphic); |
||
| 918 | $localIDColumn = $schema->sqlColumnForField($localClass, 'ID', $localPrefix); |
||
| 919 | if ($polymorphic) { |
||
| 920 | $foreignKeyIDColumn = $schema->sqlColumnForField($foreignClass, "{$foreignKey}ID", $foreignPrefix); |
||
| 921 | $foreignKeyClassColumn = $schema->sqlColumnForField($foreignClass, "{$foreignKey}Class", $foreignPrefix); |
||
| 922 | $localClassColumn = $schema->sqlColumnForField($localClass, 'ClassName', $localPrefix); |
||
| 923 | $joinExpression = |
||
| 924 | "{$foreignKeyIDColumn} = {$localIDColumn} AND {$foreignKeyClassColumn} = {$localClassColumn}"; |
||
| 925 | } else { |
||
| 926 | $foreignKeyIDColumn = $schema->sqlColumnForField($foreignClass, $foreignKey, $foreignPrefix); |
||
| 927 | $joinExpression = "{$foreignKeyIDColumn} = {$localIDColumn}"; |
||
| 928 | } |
||
| 929 | $this->query->addLeftJoin( |
||
| 930 | $foreignTable, |
||
| 931 | $joinExpression, |
||
| 932 | $foreignTableAliased |
||
| 933 | ); |
||
| 934 | |||
| 935 | // Add join clause to the component's ancestry classes so that the search filter could search on |
||
| 936 | // its ancestor fields. |
||
| 937 | $ancestry = ClassInfo::ancestry($foreignClass, true); |
||
| 938 | $ancestry = array_reverse($ancestry); |
||
| 939 | foreach ($ancestry as $ancestor) { |
||
| 940 | $ancestorTable = $schema->tableName($ancestor); |
||
| 941 | if ($ancestorTable !== $foreignTable) { |
||
| 942 | $ancestorTableAliased = $foreignPrefix.$ancestorTable; |
||
| 943 | $this->query->addLeftJoin( |
||
| 944 | $ancestorTable, |
||
| 945 | "\"{$foreignTableAliased}\".\"ID\" = \"{$ancestorTableAliased}\".\"ID\"", |
||
| 946 | $ancestorTableAliased |
||
| 947 | ); |
||
| 948 | } |
||
| 949 | } |
||
| 950 | } |
||
| 951 | |||
| 952 | /** |
||
| 953 | * Join the given class to this query with the given key |
||
| 954 | * |
||
| 955 | * @param string $localClass Name of class that has the has_one to the joined class |
||
| 956 | * @param string $localField Name of the has_one relationship to joi |
||
| 957 | * @param string $foreignClass Class to join |
||
| 958 | * @param string $localPrefix Table prefix to use for local class |
||
| 959 | * @param string $foreignPrefix Table prefix to use for joined table |
||
| 960 | */ |
||
| 961 | protected function joinHasOneRelation( |
||
| 962 | $localClass, |
||
| 963 | $localField, |
||
| 964 | $foreignClass, |
||
| 965 | $localPrefix = null, |
||
| 966 | $foreignPrefix = null |
||
| 967 | ) { |
||
| 968 | if (!$foreignClass) { |
||
| 969 | throw new InvalidArgumentException("Could not find a has_one relationship {$localField} on {$localClass}"); |
||
| 970 | } |
||
| 971 | |||
| 972 | if ($foreignClass === DataObject::class) { |
||
| 973 | throw new InvalidArgumentException( |
||
| 974 | "Could not join polymorphic has_one relationship {$localField} on {$localClass}" |
||
| 975 | ); |
||
| 976 | } |
||
| 977 | $schema = DataObject::getSchema(); |
||
| 978 | |||
| 979 | // Skip if already joined |
||
| 980 | $foreignBaseClass = $schema->baseDataClass($foreignClass); |
||
| 981 | $foreignBaseTable = $schema->tableName($foreignBaseClass); |
||
| 982 | if ($this->query->isJoinedTo($foreignPrefix.$foreignBaseTable)) { |
||
| 983 | return; |
||
| 984 | } |
||
| 985 | |||
| 986 | // Join base table |
||
| 987 | $foreignIDColumn = $schema->sqlColumnForField($foreignBaseClass, 'ID', $foreignPrefix); |
||
| 988 | $localColumn = $schema->sqlColumnForField($localClass, "{$localField}ID", $localPrefix); |
||
| 989 | $this->query->addLeftJoin( |
||
| 990 | $foreignBaseTable, |
||
| 991 | "{$foreignIDColumn} = {$localColumn}", |
||
| 992 | $foreignPrefix.$foreignBaseTable |
||
| 993 | ); |
||
| 994 | |||
| 995 | // Add join clause to the component's ancestry classes so that the search filter could search on |
||
| 996 | // its ancestor fields. |
||
| 997 | $ancestry = ClassInfo::ancestry($foreignClass, true); |
||
| 998 | if (!empty($ancestry)) { |
||
| 999 | $ancestry = array_reverse($ancestry); |
||
| 1000 | foreach ($ancestry as $ancestor) { |
||
| 1001 | $ancestorTable = $schema->tableName($ancestor); |
||
| 1002 | if ($ancestorTable !== $foreignBaseTable) { |
||
| 1003 | $ancestorTableAliased = $foreignPrefix.$ancestorTable; |
||
| 1004 | $this->query->addLeftJoin( |
||
| 1005 | $ancestorTable, |
||
| 1006 | "{$foreignIDColumn} = \"{$ancestorTableAliased}\".\"ID\"", |
||
| 1007 | $ancestorTableAliased |
||
| 1008 | ); |
||
| 1009 | } |
||
| 1010 | } |
||
| 1011 | } |
||
| 1012 | } |
||
| 1013 | |||
| 1014 | /** |
||
| 1015 | * Join table via many_many relationship |
||
| 1016 | * |
||
| 1017 | * @param string $relationClass |
||
| 1018 | * @param string $parentClass |
||
| 1019 | * @param string $componentClass |
||
| 1020 | * @param string $parentField |
||
| 1021 | * @param string $componentField |
||
| 1022 | * @param string $relationClassOrTable Name of relation table |
||
| 1023 | * @param string $parentPrefix Table prefix for parent class |
||
| 1024 | * @param string $componentPrefix Table prefix to use for both joined and mapping table |
||
| 1025 | */ |
||
| 1026 | protected function joinManyManyRelationship( |
||
| 1027 | $relationClass, |
||
| 1028 | $parentClass, |
||
| 1029 | $componentClass, |
||
| 1030 | $parentField, |
||
| 1031 | $componentField, |
||
| 1032 | $relationClassOrTable, |
||
| 1033 | $parentPrefix = null, |
||
| 1034 | $componentPrefix = null |
||
| 1035 | ) { |
||
| 1036 | $schema = DataObject::getSchema(); |
||
| 1037 | |||
| 1038 | if (class_exists($relationClassOrTable)) { |
||
| 1039 | $relationClassOrTable = $schema->tableName($relationClassOrTable); |
||
| 1040 | } |
||
| 1041 | |||
| 1042 | // Check if already joined to component alias (skip join table for the check) |
||
| 1043 | $componentBaseClass = $schema->baseDataClass($componentClass); |
||
| 1044 | $componentBaseTable = $schema->tableName($componentBaseClass); |
||
| 1045 | $componentAliasedTable = $componentPrefix . $componentBaseTable; |
||
| 1046 | if ($this->query->isJoinedTo($componentAliasedTable)) { |
||
| 1047 | return; |
||
| 1048 | } |
||
| 1049 | |||
| 1050 | // Join parent class to join table |
||
| 1051 | $relationAliasedTable = $componentPrefix.$relationClassOrTable; |
||
| 1052 | $parentIDColumn = $schema->sqlColumnForField($parentClass, 'ID', $parentPrefix); |
||
| 1053 | $this->query->addLeftJoin( |
||
| 1054 | $relationClassOrTable, |
||
| 1055 | "\"{$relationAliasedTable}\".\"{$parentField}\" = {$parentIDColumn}", |
||
| 1056 | $relationAliasedTable |
||
| 1057 | ); |
||
| 1058 | |||
| 1059 | // Join on base table of component class |
||
| 1060 | $componentIDColumn = $schema->sqlColumnForField($componentBaseClass, 'ID', $componentPrefix); |
||
| 1061 | $this->query->addLeftJoin( |
||
| 1062 | $componentBaseTable, |
||
| 1063 | "\"{$relationAliasedTable}\".\"{$componentField}\" = {$componentIDColumn}", |
||
| 1064 | $componentAliasedTable |
||
| 1065 | ); |
||
| 1066 | |||
| 1067 | // Add join clause to the component's ancestry classes so that the search filter could search on |
||
| 1068 | // its ancestor fields. |
||
| 1069 | $ancestry = ClassInfo::ancestry($componentClass, true); |
||
| 1070 | $ancestry = array_reverse($ancestry); |
||
| 1071 | foreach ($ancestry as $ancestor) { |
||
| 1072 | $ancestorTable = $schema->tableName($ancestor); |
||
| 1073 | if ($ancestorTable !== $componentBaseTable) { |
||
| 1074 | $ancestorTableAliased = $componentPrefix.$ancestorTable; |
||
| 1075 | $this->query->addLeftJoin( |
||
| 1076 | $ancestorTable, |
||
| 1077 | "{$componentIDColumn} = \"{$ancestorTableAliased}\".\"ID\"", |
||
| 1078 | $ancestorTableAliased |
||
| 1079 | ); |
||
| 1080 | } |
||
| 1081 | } |
||
| 1082 | } |
||
| 1083 | |||
| 1084 | /** |
||
| 1085 | * Removes the result of query from this query. |
||
| 1086 | * |
||
| 1087 | * @param DataQuery $subtractQuery |
||
| 1088 | * @param string $field |
||
| 1089 | * @return $this |
||
| 1090 | */ |
||
| 1091 | public function subtract(DataQuery $subtractQuery, $field = 'ID') |
||
| 1102 | } |
||
| 1103 | |||
| 1104 | /** |
||
| 1105 | * Select the only given fields from the given table. |
||
| 1106 | * |
||
| 1107 | * @param string $table Unquoted table name (will be escaped automatically) |
||
| 1108 | * @param array $fields Database column names (will be escaped automatically) |
||
| 1109 | * @return $this |
||
| 1110 | */ |
||
| 1111 | public function selectFromTable($table, $fields) |
||
| 1112 | { |
||
| 1113 | $fieldExpressions = array_map(function ($item) use ($table) { |
||
| 1114 | return Convert::symbol2sql("{$table}.{$item}"); |
||
| 1115 | }, $fields); |
||
| 1116 | |||
| 1117 | $this->query->setSelect($fieldExpressions); |
||
| 1118 | |||
| 1119 | return $this; |
||
| 1120 | } |
||
| 1121 | |||
| 1122 | /** |
||
| 1123 | * Add the given fields from the given table to the select statement. |
||
| 1124 | * |
||
| 1125 | * @param string $table Unquoted table name (will be escaped automatically) |
||
| 1126 | * @param array $fields Database column names (will be escaped automatically) |
||
| 1127 | * @return $this |
||
| 1128 | */ |
||
| 1129 | public function addSelectFromTable($table, $fields) |
||
| 1130 | { |
||
| 1131 | $fieldExpressions = array_map(function ($item) use ($table) { |
||
| 1132 | return Convert::symbol2sql("{$table}.{$item}"); |
||
| 1133 | }, $fields); |
||
| 1134 | |||
| 1135 | $this->query->addSelect($fieldExpressions); |
||
| 1136 | |||
| 1137 | return $this; |
||
| 1138 | } |
||
| 1139 | |||
| 1140 | /** |
||
| 1141 | * Query the given field column from the database and return as an array. |
||
| 1142 | * |
||
| 1143 | * @param string $field See {@link expressionForField()}. |
||
| 1144 | * @return array List of column values for the specified column |
||
| 1145 | */ |
||
| 1146 | public function column($field = 'ID') |
||
| 1147 | { |
||
| 1148 | $fieldExpression = $this->expressionForField($field); |
||
| 1149 | $query = $this->getFinalisedQuery(array($field)); |
||
| 1150 | $originalSelect = $query->getSelect(); |
||
| 1151 | $query->setSelect(array()); |
||
| 1152 | $query->selectField($fieldExpression, $field); |
||
| 1153 | $this->ensureSelectContainsOrderbyColumns($query, $originalSelect); |
||
| 1154 | |||
| 1155 | return $query->execute()->column($field); |
||
| 1156 | } |
||
| 1157 | |||
| 1158 | /** |
||
| 1159 | * @param string $field Select statement identifier, either the unquoted column name, |
||
| 1160 | * the full composite SQL statement, or the alias set through {@link SQLSelect->selectField()}. |
||
| 1161 | * @return string The expression used to query this field via this DataQuery |
||
| 1162 | */ |
||
| 1163 | protected function expressionForField($field) |
||
| 1164 | { |
||
| 1165 | // Prepare query object for selecting this field |
||
| 1166 | $query = $this->getFinalisedQuery(array($field)); |
||
| 1167 | |||
| 1168 | // Allow query to define the expression for this field |
||
| 1169 | $expression = $query->expressionForField($field); |
||
| 1170 | if (!empty($expression)) { |
||
| 1171 | return $expression; |
||
| 1172 | } |
||
| 1173 | |||
| 1174 | // Special case for ID, if not provided |
||
| 1175 | if ($field === 'ID') { |
||
| 1176 | return DataObject::getSchema()->sqlColumnForField($this->dataClass, 'ID'); |
||
| 1177 | } |
||
| 1178 | return null; |
||
| 1179 | } |
||
| 1180 | |||
| 1181 | /** |
||
| 1182 | * Select the given field expressions. |
||
| 1183 | * |
||
| 1184 | * @param string $fieldExpression String The field to select (escaped SQL statement) |
||
| 1185 | * @param string $alias String The alias of that field (escaped SQL statement) |
||
| 1186 | */ |
||
| 1187 | public function selectField($fieldExpression, $alias = null) |
||
| 1188 | { |
||
| 1189 | $this->query->selectField($fieldExpression, $alias); |
||
| 1190 | } |
||
| 1191 | |||
| 1192 | //// QUERY PARAMS |
||
| 1193 | |||
| 1194 | /** |
||
| 1195 | * An arbitrary store of query parameters that can be used by decorators. |
||
| 1196 | */ |
||
| 1197 | private $queryParams; |
||
| 1198 | |||
| 1199 | /** |
||
| 1200 | * Set an arbitrary query parameter, that can be used by decorators to add additional meta-data to the query. |
||
| 1201 | * It's expected that the $key will be namespaced, e.g, 'Versioned.stage' instead of just 'stage'. |
||
| 1202 | * |
||
| 1203 | * @param string $key |
||
| 1204 | * @param string|array $value |
||
| 1205 | * @return $this |
||
| 1206 | */ |
||
| 1207 | public function setQueryParam($key, $value) |
||
| 1208 | { |
||
| 1209 | $this->queryParams[$key] = $value; |
||
| 1210 | return $this; |
||
| 1211 | } |
||
| 1212 | |||
| 1213 | /** |
||
| 1214 | * Set an arbitrary query parameter, that can be used by decorators to add additional meta-data to the query. |
||
| 1215 | * |
||
| 1216 | * @param string $key |
||
| 1217 | * @return string |
||
| 1218 | */ |
||
| 1219 | public function getQueryParam($key) |
||
| 1220 | { |
||
| 1221 | if (isset($this->queryParams[$key])) { |
||
| 1222 | return $this->queryParams[$key]; |
||
| 1223 | } |
||
| 1224 | return null; |
||
| 1225 | } |
||
| 1226 | |||
| 1227 | /** |
||
| 1228 | * Returns all query parameters |
||
| 1229 | * @return array query parameters array |
||
| 1230 | */ |
||
| 1231 | public function getQueryParams() |
||
| 1234 | } |
||
| 1235 | |||
| 1236 | /** |
||
| 1237 | * Get query manipulators |
||
| 1238 | * |
||
| 1239 | * @return DataQueryManipulator[] |
||
| 1240 | */ |
||
| 1241 | public function getDataQueryManipulators() |
||
| 1242 | { |
||
| 1244 | } |
||
| 1245 | |||
| 1246 | /** |
||
| 1247 | * Assign callback to be invoked in getFinalisedQuery() |
||
| 1248 | * |
||
| 1249 | * @param DataQueryManipulator $manipulator |
||
| 1250 | * @return $this |
||
| 1251 | */ |
||
| 1252 | public function pushQueryManipulator(DataQueryManipulator $manipulator) |
||
| 1253 | { |
||
| 1254 | $this->dataQueryManipulators[] = $manipulator; |
||
| 1255 | return $this; |
||
| 1256 | } |
||
| 1257 | } |
||
| 1258 |
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