silverstripe /
silverstripe-framework
| Total Complexity | 141 |
| Total Lines | 1297 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
Complex classes like DataList 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 DataList, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 36 | class DataList extends ViewableData implements SS_List, Filterable, Sortable, Limitable |
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| 37 | { |
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| 38 | |||
| 39 | /** |
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| 40 | * The DataObject class name that this data list is querying |
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| 41 | * |
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| 42 | * @var string |
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| 43 | */ |
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| 44 | protected $dataClass; |
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| 45 | |||
| 46 | /** |
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| 47 | * The {@link DataQuery} object responsible for getting this DataList's records |
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| 48 | * |
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| 49 | * @var DataQuery |
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| 50 | */ |
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| 51 | protected $dataQuery; |
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| 52 | |||
| 53 | /** |
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| 54 | * A cached Query to save repeated database calls. {@see DataList::getTemplateIteratorCount()} |
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| 55 | * |
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| 56 | * @var SilverStripe\ORM\Connect\Query |
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Bug
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| 57 | */ |
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| 58 | protected $finalisedQuery; |
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| 59 | |||
| 60 | /** |
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| 61 | * Create a new DataList. |
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| 62 | * No querying is done on construction, but the initial query schema is set up. |
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| 63 | * |
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| 64 | * @param string $dataClass - The DataObject class to query. |
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| 65 | */ |
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| 66 | public function __construct($dataClass) |
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| 67 | { |
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| 68 | $this->dataClass = $dataClass; |
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| 69 | $this->dataQuery = new DataQuery($this->dataClass); |
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| 70 | |||
| 71 | parent::__construct(); |
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| 72 | } |
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| 73 | |||
| 74 | /** |
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| 75 | * Get the dataClass name for this DataList, ie the DataObject ClassName |
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| 76 | * |
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| 77 | * @return string |
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| 78 | */ |
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| 79 | public function dataClass() |
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| 80 | { |
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| 81 | return $this->dataClass; |
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| 82 | } |
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| 83 | |||
| 84 | /** |
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| 85 | * When cloning this object, clone the dataQuery object as well |
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| 86 | */ |
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| 87 | public function __clone() |
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| 91 | } |
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| 92 | |||
| 93 | /** |
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| 94 | * Return a copy of the internal {@link DataQuery} object |
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| 95 | * |
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| 96 | * Because the returned value is a copy, modifying it won't affect this list's contents. If |
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| 97 | * you want to alter the data query directly, use the alterDataQuery method |
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| 98 | * |
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| 99 | * @return DataQuery |
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| 100 | */ |
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| 101 | public function dataQuery() |
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| 102 | { |
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| 103 | return clone $this->dataQuery; |
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| 104 | } |
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| 105 | |||
| 106 | /** |
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| 107 | * @var bool - Indicates if we are in an alterDataQueryCall already, so alterDataQuery can be re-entrant |
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| 108 | */ |
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| 109 | protected $inAlterDataQueryCall = false; |
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| 110 | |||
| 111 | /** |
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| 112 | * Return a new DataList instance with the underlying {@link DataQuery} object altered |
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| 113 | * |
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| 114 | * If you want to alter the underlying dataQuery for this list, this wrapper method |
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| 115 | * will ensure that you can do so without mutating the existing List object. |
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| 116 | * |
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| 117 | * It clones this list, calls the passed callback function with the dataQuery of the new |
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| 118 | * list as it's first parameter (and the list as it's second), then returns the list |
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| 119 | * |
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| 120 | * Note that this function is re-entrant - it's safe to call this inside a callback passed to |
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| 121 | * alterDataQuery |
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| 122 | * |
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| 123 | * @param callable $callback |
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| 124 | * @return static |
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| 125 | * @throws Exception |
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| 126 | */ |
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| 127 | public function alterDataQuery($callback) |
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| 128 | { |
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| 129 | if ($this->inAlterDataQueryCall) { |
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| 130 | $list = $this; |
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| 131 | |||
| 132 | $res = call_user_func($callback, $list->dataQuery, $list); |
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| 133 | if ($res) { |
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| 134 | $list->dataQuery = $res; |
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| 135 | } |
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| 136 | |||
| 137 | return $list; |
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| 138 | } |
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| 139 | |||
| 140 | $list = clone $this; |
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| 141 | $list->inAlterDataQueryCall = true; |
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| 142 | |||
| 143 | try { |
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| 144 | $res = $callback($list->dataQuery, $list); |
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| 145 | if ($res) { |
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| 146 | $list->dataQuery = $res; |
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| 147 | } |
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| 148 | } catch (Exception $e) { |
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| 149 | $list->inAlterDataQueryCall = false; |
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| 150 | throw $e; |
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| 151 | } |
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| 152 | |||
| 153 | $list->inAlterDataQueryCall = false; |
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| 154 | return $list; |
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| 155 | } |
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| 156 | |||
| 157 | /** |
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| 158 | * Return a new DataList instance with the underlying {@link DataQuery} object changed |
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| 159 | * |
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| 160 | * @param DataQuery $dataQuery |
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| 161 | * @return static |
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| 162 | */ |
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| 163 | public function setDataQuery(DataQuery $dataQuery) |
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| 164 | { |
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| 165 | $clone = clone $this; |
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| 166 | $clone->dataQuery = $dataQuery; |
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| 167 | return $clone; |
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| 168 | } |
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| 169 | |||
| 170 | /** |
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| 171 | * Returns a new DataList instance with the specified query parameter assigned |
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| 172 | * |
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| 173 | * @param string|array $keyOrArray Either the single key to set, or an array of key value pairs to set |
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| 174 | * @param mixed $val If $keyOrArray is not an array, this is the value to set |
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| 175 | * @return static |
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| 176 | */ |
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| 177 | public function setDataQueryParam($keyOrArray, $val = null) |
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| 178 | { |
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| 179 | $clone = clone $this; |
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| 180 | |||
| 181 | if (is_array($keyOrArray)) { |
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| 182 | foreach ($keyOrArray as $key => $value) { |
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| 183 | $clone->dataQuery->setQueryParam($key, $value); |
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| 184 | } |
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| 185 | } else { |
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| 186 | $clone->dataQuery->setQueryParam($keyOrArray, $val); |
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| 187 | } |
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| 188 | |||
| 189 | return $clone; |
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| 190 | } |
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| 191 | |||
| 192 | /** |
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| 193 | * Returns the SQL query that will be used to get this DataList's records. Good for debugging. :-) |
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| 194 | * |
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| 195 | * @param array $parameters Out variable for parameters required for this query |
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| 196 | * @return string The resulting SQL query (may be paramaterised) |
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| 197 | */ |
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| 198 | public function sql(&$parameters = []) |
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| 201 | } |
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| 202 | |||
| 203 | /** |
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| 204 | * Return a new DataList instance with a WHERE clause added to this list's query. |
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| 205 | * |
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| 206 | * Supports parameterised queries. |
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| 207 | * See SQLSelect::addWhere() for syntax examples, although DataList |
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| 208 | * won't expand multiple method arguments as SQLSelect does. |
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| 209 | * |
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| 210 | * @param string|array|SQLConditionGroup $filter Predicate(s) to set, as escaped SQL statements or |
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| 211 | * paramaterised queries |
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| 212 | * @return static |
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| 213 | */ |
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| 214 | public function where($filter) |
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| 215 | { |
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| 216 | return $this->alterDataQuery(function (DataQuery $query) use ($filter) { |
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| 217 | $query->where($filter); |
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| 218 | }); |
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| 219 | } |
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| 220 | |||
| 221 | /** |
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| 222 | * Return a new DataList instance with a WHERE clause added to this list's query. |
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| 223 | * All conditions provided in the filter will be joined with an OR |
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| 224 | * |
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| 225 | * Supports parameterised queries. |
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| 226 | * See SQLSelect::addWhere() for syntax examples, although DataList |
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| 227 | * won't expand multiple method arguments as SQLSelect does. |
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| 228 | * |
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| 229 | * @param string|array|SQLConditionGroup $filter Predicate(s) to set, as escaped SQL statements or |
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| 230 | * paramaterised queries |
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| 231 | * @return static |
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| 232 | */ |
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| 233 | public function whereAny($filter) |
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| 234 | { |
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| 235 | return $this->alterDataQuery(function (DataQuery $query) use ($filter) { |
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| 236 | $query->whereAny($filter); |
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| 237 | }); |
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| 238 | } |
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| 239 | |||
| 240 | |||
| 241 | |||
| 242 | /** |
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| 243 | * Returns true if this DataList can be sorted by the given field. |
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| 244 | * |
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| 245 | * @param string $fieldName |
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| 246 | * @return boolean |
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| 247 | */ |
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| 248 | public function canSortBy($fieldName) |
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| 249 | { |
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| 250 | return $this->dataQuery()->query()->canSortBy($fieldName); |
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| 251 | } |
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| 252 | |||
| 253 | /** |
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| 254 | * Returns true if this DataList can be filtered by the given field. |
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| 255 | * |
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| 256 | * @param string $fieldName (May be a related field in dot notation like Member.FirstName) |
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| 257 | * @return boolean |
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| 258 | */ |
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| 259 | public function canFilterBy($fieldName) |
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| 260 | { |
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| 261 | $model = singleton($this->dataClass); |
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| 262 | $relations = explode(".", $fieldName); |
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| 263 | // First validate the relationships |
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| 264 | $fieldName = array_pop($relations); |
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| 265 | foreach ($relations as $r) { |
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| 266 | $relationClass = $model->getRelationClass($r); |
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| 267 | if (!$relationClass) { |
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| 268 | return false; |
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| 269 | } |
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| 270 | $model = singleton($relationClass); |
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| 271 | if (!$model) { |
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| 272 | return false; |
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| 273 | } |
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| 274 | } |
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| 275 | // Then check field |
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| 276 | if ($model->hasDatabaseField($fieldName)) { |
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| 277 | return true; |
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| 278 | } |
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| 279 | return false; |
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| 280 | } |
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| 281 | |||
| 282 | /** |
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| 283 | * Return a new DataList instance with the records returned in this query |
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| 284 | * restricted by a limit clause. |
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| 285 | * |
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| 286 | * @param int $limit |
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| 287 | * @param int $offset |
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| 288 | * @return static |
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| 289 | */ |
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| 290 | public function limit($limit, $offset = 0) |
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| 291 | { |
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| 292 | return $this->alterDataQuery(function (DataQuery $query) use ($limit, $offset) { |
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| 293 | $query->limit($limit, $offset); |
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| 294 | }); |
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| 295 | } |
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| 296 | |||
| 297 | /** |
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| 298 | * Return a new DataList instance with distinct records or not |
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| 299 | * |
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| 300 | * @param bool $value |
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| 301 | * @return static |
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| 302 | */ |
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| 303 | public function distinct($value) |
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| 307 | }); |
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| 308 | } |
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| 309 | |||
| 310 | /** |
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| 311 | * Return a new DataList instance as a copy of this data list with the sort |
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| 312 | * order set. |
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| 313 | * |
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| 314 | * @see SS_List::sort() |
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| 315 | * @see SQLSelect::orderby |
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| 316 | * @example $list = $list->sort('Name'); // default ASC sorting |
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| 317 | * @example $list = $list->sort('Name DESC'); // DESC sorting |
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| 318 | * @example $list = $list->sort('Name', 'ASC'); |
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| 319 | * @example $list = $list->sort(array('Name'=>'ASC', 'Age'=>'DESC')); |
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| 320 | * |
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| 321 | * @param String|array Escaped SQL statement. If passed as array, all keys and values are assumed to be escaped. |
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| 322 | * @return static |
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| 323 | */ |
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| 324 | public function sort() |
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| 369 | } |
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| 370 | } |
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| 371 | }); |
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| 372 | } |
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| 373 | |||
| 374 | /** |
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| 375 | * Return a copy of this list which only includes items with these charactaristics |
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| 376 | * |
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| 377 | * @see SS_List::filter() |
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| 378 | * |
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| 379 | * @example $list = $list->filter('Name', 'bob'); // only bob in the list |
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| 380 | * @example $list = $list->filter('Name', array('aziz', 'bob'); // aziz and bob in list |
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| 381 | * @example $list = $list->filter(array('Name'=>'bob', 'Age'=>21)); // bob with the age 21 |
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| 382 | * @example $list = $list->filter(array('Name'=>'bob', 'Age'=>array(21, 43))); // bob with the Age 21 or 43 |
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| 383 | * @example $list = $list->filter(array('Name'=>array('aziz','bob'), 'Age'=>array(21, 43))); |
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| 384 | * // aziz with the age 21 or 43 and bob with the Age 21 or 43 |
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| 385 | * |
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| 386 | * Note: When filtering on nullable columns, null checks will be automatically added. |
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| 387 | * E.g. ->filter('Field:not', 'value) will generate '... OR "Field" IS NULL', and |
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| 388 | * ->filter('Field:not', null) will generate '"Field" IS NOT NULL' |
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| 389 | * |
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| 390 | * @todo extract the sql from $customQuery into a SQLGenerator class |
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| 391 | * |
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| 392 | * @param string|array Escaped SQL statement. If passed as array, all keys and values will be escaped internally |
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| 393 | * @return $this |
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| 394 | */ |
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| 395 | public function filter() |
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| 396 | { |
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| 397 | // Validate and process arguments |
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| 398 | $arguments = func_get_args(); |
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| 399 | switch (sizeof($arguments)) { |
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| 400 | case 1: |
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| 401 | $filters = $arguments[0]; |
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| 402 | |||
| 403 | break; |
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| 404 | case 2: |
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| 405 | $filters = [$arguments[0] => $arguments[1]]; |
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| 406 | |||
| 407 | break; |
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| 408 | default: |
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| 409 | throw new InvalidArgumentException('Incorrect number of arguments passed to filter()'); |
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| 410 | } |
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| 411 | |||
| 412 | return $this->addFilter($filters); |
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| 413 | } |
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| 414 | |||
| 415 | /** |
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| 416 | * Return a new instance of the list with an added filter |
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| 417 | * |
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| 418 | * @param array $filterArray |
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| 419 | * @return $this |
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| 420 | */ |
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| 421 | public function addFilter($filterArray) |
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| 431 | } |
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| 432 | |||
| 433 | /** |
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| 434 | * Return a copy of this list which contains items matching any of these charactaristics. |
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| 435 | * |
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| 436 | * @example // only bob in the list |
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| 437 | * $list = $list->filterAny('Name', 'bob'); |
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| 438 | * // SQL: WHERE "Name" = 'bob' |
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| 439 | * @example // azis or bob in the list |
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| 440 | * $list = $list->filterAny('Name', array('aziz', 'bob'); |
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| 441 | * // SQL: WHERE ("Name" IN ('aziz','bob')) |
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| 442 | * @example // bob or anyone aged 21 in the list |
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| 443 | * $list = $list->filterAny(array('Name'=>'bob, 'Age'=>21)); |
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| 444 | * // SQL: WHERE ("Name" = 'bob' OR "Age" = '21') |
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| 445 | * @example // bob or anyone aged 21 or 43 in the list |
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| 446 | * $list = $list->filterAny(array('Name'=>'bob, 'Age'=>array(21, 43))); |
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| 447 | * // SQL: WHERE ("Name" = 'bob' OR ("Age" IN ('21', '43')) |
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| 448 | * @example // all bobs, phils or anyone aged 21 or 43 in the list |
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| 449 | * $list = $list->filterAny(array('Name'=>array('bob','phil'), 'Age'=>array(21, 43))); |
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| 450 | * // SQL: WHERE (("Name" IN ('bob', 'phil')) OR ("Age" IN ('21', '43')) |
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| 451 | * |
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| 452 | * @todo extract the sql from this method into a SQLGenerator class |
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| 453 | * |
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| 454 | * @param string|array See {@link filter()} |
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| 455 | * @return static |
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| 456 | */ |
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| 457 | public function filterAny() |
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| 476 | } |
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| 477 | }); |
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| 478 | } |
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| 479 | |||
| 480 | /** |
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| 481 | * Note that, in the current implementation, the filtered list will be an ArrayList, but this may change in a |
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| 482 | * future implementation. |
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| 483 | * @see Filterable::filterByCallback() |
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| 484 | * |
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| 485 | * @example $list = $list->filterByCallback(function($item, $list) { return $item->Age == 9; }) |
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| 486 | * @param callable $callback |
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| 487 | * @return ArrayList (this may change in future implementations) |
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| 488 | */ |
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| 489 | public function filterByCallback($callback) |
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| 505 | } |
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| 506 | |||
| 507 | /** |
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| 508 | * Given a field or relation name, apply it safely to this datalist. |
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| 509 | * |
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| 510 | * Unlike getRelationName, this is immutable and will fallback to the quoted field |
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| 511 | * name if not a relation. |
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| 512 | * |
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| 513 | * Example use (simple WHERE condition on data sitting in a related table): |
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| 514 | * |
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| 515 | * <code> |
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| 516 | * $columnName = null; |
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| 517 | * $list = Page::get() |
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| 518 | * ->applyRelation('TaxonomyTerms.ID', $columnName) |
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| 519 | * ->where([$columnName => 'my value']); |
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| 520 | * </code> |
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| 521 | * |
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| 522 | * |
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| 523 | * @param string $field Name of field or relation to apply |
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| 524 | * @param string &$columnName Quoted column name |
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| 525 | * @param bool $linearOnly Set to true to restrict to linear relations only. Set this |
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| 526 | * if this relation will be used for sorting, and should not include duplicate rows. |
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| 527 | * @return $this DataList with this relation applied |
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| 528 | */ |
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| 529 | public function applyRelation($field, &$columnName = null, $linearOnly = false) |
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| 530 | { |
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| 531 | // If field is invalid, return it without modification |
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| 532 | if (!$this->isValidRelationName($field)) { |
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| 533 | $columnName = $field; |
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| 534 | return $this; |
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| 535 | } |
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| 536 | |||
| 537 | // Simple fields without relations are mapped directly |
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| 538 | if (strpos($field, '.') === false) { |
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| 539 | $columnName = '"' . $field . '"'; |
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| 540 | return $this; |
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| 541 | } |
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| 542 | |||
| 543 | return $this->alterDataQuery( |
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| 544 | function (DataQuery $query) use ($field, &$columnName, $linearOnly) { |
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| 545 | $relations = explode('.', $field); |
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| 546 | $fieldName = array_pop($relations); |
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| 547 | |||
| 548 | // Apply relation |
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| 549 | $relationModelName = $query->applyRelation($relations, $linearOnly); |
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| 550 | $relationPrefix = $query->applyRelationPrefix($relations); |
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| 551 | |||
| 552 | // Find the db field the relation belongs to |
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| 553 | $columnName = DataObject::getSchema() |
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| 554 | ->sqlColumnForField($relationModelName, $fieldName, $relationPrefix); |
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| 555 | } |
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| 556 | ); |
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| 557 | } |
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| 558 | |||
| 559 | /** |
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| 560 | * Check if the given field specification could be interpreted as an unquoted relation name |
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| 561 | * |
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| 562 | * @param string $field |
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| 563 | * @return bool |
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| 564 | */ |
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| 565 | protected function isValidRelationName($field) |
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| 566 | { |
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| 567 | return preg_match('/^[A-Z0-9._]+$/i', $field); |
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| 568 | } |
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| 569 | |||
| 570 | /** |
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| 571 | * Given a filter expression and value construct a {@see SearchFilter} instance |
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| 572 | * |
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| 573 | * @param string $filter E.g. `Name:ExactMatch:not`, `Name:ExactMatch`, `Name:not`, `Name` |
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| 574 | * @param mixed $value Value of the filter |
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| 575 | * @return SearchFilter |
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| 576 | */ |
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| 577 | protected function createSearchFilter($filter, $value) |
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| 578 | { |
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| 579 | // Field name is always the first component |
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| 580 | $fieldArgs = explode(':', $filter); |
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| 581 | $fieldName = array_shift($fieldArgs); |
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| 582 | |||
| 583 | // Inspect type of second argument to determine context |
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| 584 | $secondArg = array_shift($fieldArgs); |
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| 585 | $modifiers = $fieldArgs; |
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| 586 | if (!$secondArg) { |
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| 587 | // Use default filter if none specified. E.g. `->filter(['Name' => $myname])` |
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| 588 | $filterServiceName = 'DataListFilter.default'; |
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| 589 | } else { |
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| 590 | // The presence of a second argument is by default ambiguous; We need to query |
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| 591 | // Whether this is a valid modifier on the default filter, or a filter itself. |
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| 592 | /** @var SearchFilter $defaultFilterInstance */ |
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| 593 | $defaultFilterInstance = Injector::inst()->get('DataListFilter.default'); |
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| 594 | if (in_array(strtolower($secondArg), $defaultFilterInstance->getSupportedModifiers())) { |
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| 595 | // Treat second (and any subsequent) argument as modifiers, using default filter |
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| 596 | $filterServiceName = 'DataListFilter.default'; |
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| 597 | array_unshift($modifiers, $secondArg); |
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| 598 | } else { |
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| 599 | // Second argument isn't a valid modifier, so assume is filter identifier |
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| 600 | $filterServiceName = "DataListFilter.{$secondArg}"; |
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| 601 | } |
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| 602 | } |
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| 603 | |||
| 604 | // Build instance |
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| 605 | return Injector::inst()->create($filterServiceName, $fieldName, $value, $modifiers); |
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| 606 | } |
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| 607 | |||
| 608 | /** |
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| 609 | * Return a copy of this list which does not contain any items that match all params |
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| 610 | * |
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| 611 | * @example $list = $list->exclude('Name', 'bob'); // exclude bob from list |
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| 612 | * @example $list = $list->exclude('Name', array('aziz', 'bob'); // exclude aziz and bob from list |
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| 613 | * @example $list = $list->exclude(array('Name'=>'bob, 'Age'=>21)); // exclude bob that has Age 21 |
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| 614 | * @example $list = $list->exclude(array('Name'=>'bob, 'Age'=>array(21, 43))); // exclude bob with Age 21 or 43 |
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| 615 | * @example $list = $list->exclude(array('Name'=>array('bob','phil'), 'Age'=>array(21, 43))); |
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| 616 | * // bob age 21 or 43, phil age 21 or 43 would be excluded |
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| 617 | * |
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| 618 | * @todo extract the sql from this method into a SQLGenerator class |
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| 619 | * |
||
| 620 | * @param string|array |
||
| 621 | * @param string [optional] |
||
| 622 | * |
||
| 623 | * @return $this |
||
| 624 | */ |
||
| 625 | public function exclude() |
||
| 626 | { |
||
| 627 | $numberFuncArgs = count(func_get_args()); |
||
| 628 | $whereArguments = []; |
||
| 629 | |||
| 630 | if ($numberFuncArgs == 1 && is_array(func_get_arg(0))) { |
||
| 631 | $whereArguments = func_get_arg(0); |
||
| 632 | } elseif ($numberFuncArgs == 2) { |
||
| 633 | $whereArguments[func_get_arg(0)] = func_get_arg(1); |
||
| 634 | } else { |
||
| 635 | throw new InvalidArgumentException('Incorrect number of arguments passed to exclude()'); |
||
| 636 | } |
||
| 637 | |||
| 638 | return $this->alterDataQuery(function (DataQuery $query) use ($whereArguments) { |
||
| 639 | $subquery = $query->disjunctiveGroup(); |
||
| 640 | |||
| 641 | foreach ($whereArguments as $field => $value) { |
||
| 642 | $filter = $this->createSearchFilter($field, $value); |
||
| 643 | $filter->exclude($subquery); |
||
| 644 | } |
||
| 645 | }); |
||
| 646 | } |
||
| 647 | |||
| 648 | /** |
||
| 649 | * Return a copy of this list which does not contain any items with any of these params |
||
| 650 | * |
||
| 651 | * @example $list = $list->excludeAny('Name', 'bob'); // exclude bob from list |
||
| 652 | * @example $list = $list->excludeAny('Name', array('aziz', 'bob'); // exclude aziz and bob from list |
||
| 653 | * @example $list = $list->excludeAny(array('Name'=>'bob, 'Age'=>21)); // exclude bob or Age 21 |
||
| 654 | * @example $list = $list->excludeAny(array('Name'=>'bob, 'Age'=>array(21, 43))); // exclude bob or Age 21 or 43 |
||
| 655 | * @example $list = $list->excludeAny(array('Name'=>array('bob','phil'), 'Age'=>array(21, 43))); |
||
| 656 | * // bob, phil, 21 or 43 would be excluded |
||
| 657 | * |
||
| 658 | * @param string|array |
||
| 659 | * @param string [optional] |
||
| 660 | * |
||
| 661 | * @return $this |
||
| 662 | */ |
||
| 663 | public function excludeAny() |
||
| 664 | { |
||
| 665 | $numberFuncArgs = count(func_get_args()); |
||
| 666 | $whereArguments = []; |
||
| 667 | |||
| 668 | if ($numberFuncArgs == 1 && is_array(func_get_arg(0))) { |
||
| 669 | $whereArguments = func_get_arg(0); |
||
| 670 | } elseif ($numberFuncArgs == 2) { |
||
| 671 | $whereArguments[func_get_arg(0)] = func_get_arg(1); |
||
| 672 | } else { |
||
| 673 | throw new InvalidArgumentException('Incorrect number of arguments passed to excludeAny()'); |
||
| 674 | } |
||
| 675 | |||
| 676 | return $this->alterDataQuery(function (DataQuery $dataQuery) use ($whereArguments) { |
||
| 677 | foreach ($whereArguments as $field => $value) { |
||
| 678 | $filter = $this->createSearchFilter($field, $value); |
||
| 679 | $filter->exclude($dataQuery); |
||
| 680 | } |
||
| 681 | return $dataQuery; |
||
| 682 | }); |
||
| 683 | } |
||
| 684 | |||
| 685 | /** |
||
| 686 | * This method returns a copy of this list that does not contain any DataObjects that exists in $list |
||
| 687 | * |
||
| 688 | * The $list passed needs to contain the same dataclass as $this |
||
| 689 | * |
||
| 690 | * @param DataList $list |
||
| 691 | * @return static |
||
| 692 | * @throws InvalidArgumentException |
||
| 693 | */ |
||
| 694 | public function subtract(DataList $list) |
||
| 695 | { |
||
| 696 | if ($this->dataClass() != $list->dataClass()) { |
||
| 697 | throw new InvalidArgumentException('The list passed must have the same dataclass as this class'); |
||
| 698 | } |
||
| 699 | |||
| 700 | return $this->alterDataQuery(function (DataQuery $query) use ($list) { |
||
| 701 | $query->subtract($list->dataQuery()); |
||
| 702 | }); |
||
| 703 | } |
||
| 704 | |||
| 705 | /** |
||
| 706 | * Return a new DataList instance with an inner join clause added to this list's query. |
||
| 707 | * |
||
| 708 | * @param string $table Table name (unquoted and as escaped SQL) |
||
| 709 | * @param string $onClause Escaped SQL statement, e.g. '"Table1"."ID" = "Table2"."ID"' |
||
| 710 | * @param string $alias - if you want this table to be aliased under another name |
||
| 711 | * @param int $order A numerical index to control the order that joins are added to the query; lower order values |
||
| 712 | * will cause the query to appear first. The default is 20, and joins created automatically by the |
||
| 713 | * ORM have a value of 10. |
||
| 714 | * @param array $parameters Any additional parameters if the join is a parameterised subquery |
||
| 715 | * @return static |
||
| 716 | */ |
||
| 717 | public function innerJoin($table, $onClause, $alias = null, $order = 20, $parameters = []) |
||
| 718 | { |
||
| 719 | return $this->alterDataQuery(function (DataQuery $query) use ($table, $onClause, $alias, $order, $parameters) { |
||
| 720 | $query->innerJoin($table, $onClause, $alias, $order, $parameters); |
||
| 721 | }); |
||
| 722 | } |
||
| 723 | |||
| 724 | /** |
||
| 725 | * Return a new DataList instance with a left join clause added to this list's query. |
||
| 726 | * |
||
| 727 | * @param string $table Table name (unquoted and as escaped SQL) |
||
| 728 | * @param string $onClause Escaped SQL statement, e.g. '"Table1"."ID" = "Table2"."ID"' |
||
| 729 | * @param string $alias - if you want this table to be aliased under another name |
||
| 730 | * @param int $order A numerical index to control the order that joins are added to the query; lower order values |
||
| 731 | * will cause the query to appear first. The default is 20, and joins created automatically by the |
||
| 732 | * ORM have a value of 10. |
||
| 733 | * @param array $parameters Any additional parameters if the join is a parameterised subquery |
||
| 734 | * @return static |
||
| 735 | */ |
||
| 736 | public function leftJoin($table, $onClause, $alias = null, $order = 20, $parameters = []) |
||
| 737 | { |
||
| 738 | return $this->alterDataQuery(function (DataQuery $query) use ($table, $onClause, $alias, $order, $parameters) { |
||
| 739 | $query->leftJoin($table, $onClause, $alias, $order, $parameters); |
||
| 740 | }); |
||
| 741 | } |
||
| 742 | |||
| 743 | /** |
||
| 744 | * Return an array of the actual items that this DataList contains at this stage. |
||
| 745 | * This is when the query is actually executed. |
||
| 746 | * |
||
| 747 | * @return array |
||
| 748 | */ |
||
| 749 | public function toArray() |
||
| 750 | { |
||
| 751 | $query = $this->dataQuery->query(); |
||
| 752 | $rows = $query->execute(); |
||
| 753 | $results = []; |
||
| 754 | |||
| 755 | foreach ($rows as $row) { |
||
| 756 | $results[] = $this->createDataObject($row); |
||
| 757 | } |
||
| 758 | |||
| 759 | return $results; |
||
| 760 | } |
||
| 761 | |||
| 762 | /** |
||
| 763 | * Return this list as an array and every object it as an sub array as well |
||
| 764 | * |
||
| 765 | * @return array |
||
| 766 | */ |
||
| 767 | public function toNestedArray() |
||
| 768 | { |
||
| 769 | $result = []; |
||
| 770 | |||
| 771 | foreach ($this as $item) { |
||
| 772 | $result[] = $item->toMap(); |
||
| 773 | } |
||
| 774 | |||
| 775 | return $result; |
||
| 776 | } |
||
| 777 | |||
| 778 | /** |
||
| 779 | * Walks the list using the specified callback |
||
| 780 | * |
||
| 781 | * @param callable $callback |
||
| 782 | * @return $this |
||
| 783 | */ |
||
| 784 | public function each($callback) |
||
| 785 | { |
||
| 786 | foreach ($this as $row) { |
||
| 787 | $callback($row); |
||
| 788 | } |
||
| 789 | |||
| 790 | return $this; |
||
| 791 | } |
||
| 792 | |||
| 793 | /** |
||
| 794 | * Returns a generator for this DataList |
||
| 795 | * |
||
| 796 | * @return \Generator&DataObject[] |
||
| 797 | */ |
||
| 798 | public function getGenerator() |
||
| 799 | { |
||
| 800 | $query = $this->dataQuery->query()->execute(); |
||
| 801 | |||
| 802 | while ($row = $query->record()) { |
||
| 803 | yield $this->createDataObject($row); |
||
| 804 | } |
||
| 805 | } |
||
| 806 | |||
| 807 | public function debug() |
||
| 808 | { |
||
| 809 | $val = "<h2>" . static::class . "</h2><ul>"; |
||
| 810 | foreach ($this->toNestedArray() as $item) { |
||
| 811 | $val .= "<li style=\"list-style-type: disc; margin-left: 20px\">" . Debug::text($item) . "</li>"; |
||
| 812 | } |
||
| 813 | $val .= "</ul>"; |
||
| 814 | return $val; |
||
| 815 | } |
||
| 816 | |||
| 817 | /** |
||
| 818 | * Returns a map of this list |
||
| 819 | * |
||
| 820 | * @param string $keyField - the 'key' field of the result array |
||
| 821 | * @param string $titleField - the value field of the result array |
||
| 822 | * @return Map |
||
| 823 | */ |
||
| 824 | public function map($keyField = 'ID', $titleField = 'Title') |
||
| 825 | { |
||
| 826 | return new Map($this, $keyField, $titleField); |
||
| 827 | } |
||
| 828 | |||
| 829 | /** |
||
| 830 | * Create a DataObject from the given SQL row |
||
| 831 | * |
||
| 832 | * @param array $row |
||
| 833 | * @return DataObject |
||
| 834 | */ |
||
| 835 | public function createDataObject($row) |
||
| 836 | { |
||
| 837 | $class = $this->dataClass; |
||
| 838 | |||
| 839 | if (empty($row['ClassName'])) { |
||
| 840 | $row['ClassName'] = $class; |
||
| 841 | } |
||
| 842 | |||
| 843 | // Failover from RecordClassName to ClassName |
||
| 844 | if (empty($row['RecordClassName'])) { |
||
| 845 | $row['RecordClassName'] = $row['ClassName']; |
||
| 846 | } |
||
| 847 | |||
| 848 | // Instantiate the class mentioned in RecordClassName only if it exists, otherwise default to $this->dataClass |
||
| 849 | if (class_exists($row['RecordClassName'])) { |
||
| 850 | $class = $row['RecordClassName']; |
||
| 851 | } |
||
| 852 | |||
| 853 | $item = Injector::inst()->create($class, $row, false, $this->getQueryParams()); |
||
| 854 | |||
| 855 | return $item; |
||
| 856 | } |
||
| 857 | |||
| 858 | /** |
||
| 859 | * Get query parameters for this list. |
||
| 860 | * These values will be assigned as query parameters to newly created objects from this list. |
||
| 861 | * |
||
| 862 | * @return array |
||
| 863 | */ |
||
| 864 | public function getQueryParams() |
||
| 865 | { |
||
| 866 | return $this->dataQuery()->getQueryParams(); |
||
| 867 | } |
||
| 868 | |||
| 869 | /** |
||
| 870 | * Returns an Iterator for this DataList. |
||
| 871 | * This function allows you to use DataLists in foreach loops |
||
| 872 | * |
||
| 873 | * @return Generator |
||
| 874 | */ |
||
| 875 | public function getIterator() |
||
| 876 | { |
||
| 877 | foreach ($this->getFinalisedQuery() as $row) { |
||
| 878 | yield $this->createDataObject($row); |
||
| 879 | } |
||
| 880 | |||
| 881 | // Re-set the finaliseQuery so that it can be re-executed |
||
| 882 | $this->finalisedQuery = null; |
||
| 883 | } |
||
| 884 | |||
| 885 | /** |
||
| 886 | * Returns the Query result for this DataList. Repeated calls will return |
||
| 887 | * a cached result, unless the DataQuery underlying this list has been |
||
| 888 | * modified |
||
| 889 | * |
||
| 890 | * @return SilverStripe\ORM\Connect\Query |
||
| 891 | * @internal This API may change in minor releases |
||
| 892 | */ |
||
| 893 | protected function getFinalisedQuery() |
||
| 894 | { |
||
| 895 | if (!$this->finalisedQuery) { |
||
| 896 | $this->finalisedQuery = $this->dataQuery->query()->execute(); |
||
| 897 | } |
||
| 898 | |||
| 899 | return $this->finalisedQuery; |
||
| 900 | } |
||
| 901 | |||
| 902 | /** |
||
| 903 | * Return the number of items in this DataList |
||
| 904 | * |
||
| 905 | * @return int |
||
| 906 | */ |
||
| 907 | public function count() |
||
| 908 | { |
||
| 909 | if ($this->finalisedQuery) { |
||
| 910 | return $this->finalisedQuery->numRecords(); |
||
| 911 | } |
||
| 912 | |||
| 913 | return $this->dataQuery->count(); |
||
| 914 | } |
||
| 915 | |||
| 916 | /** |
||
| 917 | * Return the maximum value of the given field in this DataList |
||
| 918 | * |
||
| 919 | * @param string $fieldName |
||
| 920 | * @return mixed |
||
| 921 | */ |
||
| 922 | public function max($fieldName) |
||
| 923 | { |
||
| 924 | return $this->dataQuery->max($fieldName); |
||
| 925 | } |
||
| 926 | |||
| 927 | /** |
||
| 928 | * Return the minimum value of the given field in this DataList |
||
| 929 | * |
||
| 930 | * @param string $fieldName |
||
| 931 | * @return mixed |
||
| 932 | */ |
||
| 933 | public function min($fieldName) |
||
| 934 | { |
||
| 935 | return $this->dataQuery->min($fieldName); |
||
| 936 | } |
||
| 937 | |||
| 938 | /** |
||
| 939 | * Return the average value of the given field in this DataList |
||
| 940 | * |
||
| 941 | * @param string $fieldName |
||
| 942 | * @return mixed |
||
| 943 | */ |
||
| 944 | public function avg($fieldName) |
||
| 945 | { |
||
| 946 | return $this->dataQuery->avg($fieldName); |
||
| 947 | } |
||
| 948 | |||
| 949 | /** |
||
| 950 | * Return the sum of the values of the given field in this DataList |
||
| 951 | * |
||
| 952 | * @param string $fieldName |
||
| 953 | * @return mixed |
||
| 954 | */ |
||
| 955 | public function sum($fieldName) |
||
| 956 | { |
||
| 957 | return $this->dataQuery->sum($fieldName); |
||
| 958 | } |
||
| 959 | |||
| 960 | |||
| 961 | /** |
||
| 962 | * Returns the first item in this DataList |
||
| 963 | * |
||
| 964 | * @return DataObject |
||
| 965 | */ |
||
| 966 | public function first() |
||
| 967 | { |
||
| 968 | foreach ($this->dataQuery->firstRow()->execute() as $row) { |
||
| 969 | return $this->createDataObject($row); |
||
| 970 | } |
||
| 971 | return null; |
||
| 972 | } |
||
| 973 | |||
| 974 | /** |
||
| 975 | * Returns the last item in this DataList |
||
| 976 | * |
||
| 977 | * @return DataObject |
||
| 978 | */ |
||
| 979 | public function last() |
||
| 980 | { |
||
| 981 | foreach ($this->dataQuery->lastRow()->execute() as $row) { |
||
| 982 | return $this->createDataObject($row); |
||
| 983 | } |
||
| 984 | return null; |
||
| 985 | } |
||
| 986 | |||
| 987 | /** |
||
| 988 | * Returns true if this DataList has items |
||
| 989 | * |
||
| 990 | * @return bool |
||
| 991 | */ |
||
| 992 | public function exists() |
||
| 993 | { |
||
| 994 | return $this->count() > 0; |
||
| 995 | } |
||
| 996 | |||
| 997 | /** |
||
| 998 | * Find the first DataObject of this DataList where the given key = value |
||
| 999 | * |
||
| 1000 | * @param string $key |
||
| 1001 | * @param string $value |
||
| 1002 | * @return DataObject|null |
||
| 1003 | */ |
||
| 1004 | public function find($key, $value) |
||
| 1005 | { |
||
| 1006 | return $this->filter($key, $value)->first(); |
||
| 1007 | } |
||
| 1008 | |||
| 1009 | /** |
||
| 1010 | * Restrict the columns to fetch into this DataList |
||
| 1011 | * |
||
| 1012 | * @param array $queriedColumns |
||
| 1013 | * @return static |
||
| 1014 | */ |
||
| 1015 | public function setQueriedColumns($queriedColumns) |
||
| 1016 | { |
||
| 1017 | return $this->alterDataQuery(function (DataQuery $query) use ($queriedColumns) { |
||
| 1018 | $query->setQueriedColumns($queriedColumns); |
||
| 1019 | }); |
||
| 1020 | } |
||
| 1021 | |||
| 1022 | /** |
||
| 1023 | * Filter this list to only contain the given Primary IDs |
||
| 1024 | * |
||
| 1025 | * @param array $ids Array of integers |
||
| 1026 | * @throws InvalidArgumentException |
||
| 1027 | * @return $this |
||
| 1028 | */ |
||
| 1029 | public function byIDs($ids) |
||
| 1030 | { |
||
| 1031 | $intIDs = array(); |
||
| 1032 | foreach ($ids as $id) { |
||
| 1033 | if (!is_numeric($id)) { |
||
| 1034 | throw new InvalidArgumentException( |
||
| 1035 | 'Invalid value passed to byIDs() in param array. All params have to be numeric or of type Integer.' |
||
| 1036 | ); |
||
| 1037 | } |
||
| 1038 | $intIDs[] = intval($id, 10); |
||
| 1039 | } |
||
| 1040 | |||
| 1041 | return $this->filter('ID', $intIDs); |
||
| 1042 | } |
||
| 1043 | |||
| 1044 | /** |
||
| 1045 | * Return the first DataObject with the given ID |
||
| 1046 | * |
||
| 1047 | * @param int $id |
||
| 1048 | * @return DataObject |
||
| 1049 | * @throws InvalidArgumentException |
||
| 1050 | */ |
||
| 1051 | public function byID($id) |
||
| 1052 | { |
||
| 1053 | if (!is_numeric($id)) { |
||
| 1054 | throw new InvalidArgumentException( |
||
| 1055 | 'Incorrect param type for $id passed to byID(). Numeric value is expected.' |
||
| 1056 | ); |
||
| 1057 | } |
||
| 1058 | return $this->filter('ID', intval($id, 10))->first(); |
||
| 1059 | } |
||
| 1060 | |||
| 1061 | /** |
||
| 1062 | * Returns an array of a single field value for all items in the list. |
||
| 1063 | * |
||
| 1064 | * @param string $colName |
||
| 1065 | * @return array |
||
| 1066 | */ |
||
| 1067 | public function column($colName = "ID") |
||
| 1068 | { |
||
| 1069 | if ($this->finalisedQuery) { |
||
| 1070 | return $this->finalisedQuery->distinct(false)->column($colName); |
||
| 1071 | } |
||
| 1072 | |||
| 1073 | return $this->dataQuery->distinct(false)->column($colName); |
||
| 1074 | } |
||
| 1075 | |||
| 1076 | /** |
||
| 1077 | * Returns a unique array of a single field value for all items in the list. |
||
| 1078 | * |
||
| 1079 | * @param string $colName |
||
| 1080 | * @return array |
||
| 1081 | */ |
||
| 1082 | public function columnUnique($colName = "ID") |
||
| 1083 | { |
||
| 1084 | if ($this->finalisedQuery) { |
||
| 1085 | return $this->finalisedQuery->distinct(true)->column($colName); |
||
| 1086 | } |
||
| 1087 | return $this->dataQuery->distinct(true)->column($colName); |
||
| 1088 | } |
||
| 1089 | |||
| 1090 | // Member altering methods |
||
| 1091 | |||
| 1092 | /** |
||
| 1093 | * Sets the ComponentSet to be the given ID list. |
||
| 1094 | * Records will be added and deleted as appropriate. |
||
| 1095 | * |
||
| 1096 | * @param array $idList List of IDs. |
||
| 1097 | */ |
||
| 1098 | public function setByIDList($idList) |
||
| 1099 | { |
||
| 1100 | $has = []; |
||
| 1101 | |||
| 1102 | // Index current data |
||
| 1103 | foreach ($this->column() as $id) { |
||
| 1104 | $has[$id] = true; |
||
| 1105 | } |
||
| 1106 | |||
| 1107 | // Keep track of items to delete |
||
| 1108 | $itemsToDelete = $has; |
||
| 1109 | |||
| 1110 | // add items in the list |
||
| 1111 | // $id is the database ID of the record |
||
| 1112 | if ($idList) { |
||
| 1113 | foreach ($idList as $id) { |
||
| 1114 | unset($itemsToDelete[$id]); |
||
| 1115 | if ($id && !isset($has[$id])) { |
||
| 1116 | $this->add($id); |
||
| 1117 | } |
||
| 1118 | } |
||
| 1119 | } |
||
| 1120 | |||
| 1121 | // Remove any items that haven't been mentioned |
||
| 1122 | $this->removeMany(array_keys($itemsToDelete)); |
||
| 1123 | } |
||
| 1124 | |||
| 1125 | /** |
||
| 1126 | * Returns an array with both the keys and values set to the IDs of the records in this list. |
||
| 1127 | * Does not respect sort order. Use ->column("ID") to get an ID list with the current sort. |
||
| 1128 | * |
||
| 1129 | * @return array |
||
| 1130 | */ |
||
| 1131 | public function getIDList() |
||
| 1132 | { |
||
| 1133 | $ids = $this->column("ID"); |
||
| 1134 | return $ids ? array_combine($ids, $ids) : []; |
||
| 1135 | } |
||
| 1136 | |||
| 1137 | /** |
||
| 1138 | * Returns a HasManyList or ManyMany list representing the querying of a relation across all |
||
| 1139 | * objects in this data list. For it to work, the relation must be defined on the data class |
||
| 1140 | * that you used to create this DataList. |
||
| 1141 | * |
||
| 1142 | * Example: Get members from all Groups: |
||
| 1143 | * |
||
| 1144 | * DataList::Create(\SilverStripe\Security\Group::class)->relation("Members") |
||
| 1145 | * |
||
| 1146 | * @param string $relationName |
||
| 1147 | * @return HasManyList|ManyManyList |
||
| 1148 | */ |
||
| 1149 | public function relation($relationName) |
||
| 1150 | { |
||
| 1151 | $ids = $this->column('ID'); |
||
| 1152 | $singleton = DataObject::singleton($this->dataClass); |
||
| 1153 | /** @var HasManyList|ManyManyList $relation */ |
||
| 1154 | $relation = $singleton->$relationName($ids); |
||
| 1155 | return $relation; |
||
| 1156 | } |
||
| 1157 | |||
| 1158 | public function dbObject($fieldName) |
||
| 1159 | { |
||
| 1160 | return singleton($this->dataClass)->dbObject($fieldName); |
||
| 1161 | } |
||
| 1162 | |||
| 1163 | /** |
||
| 1164 | * Add a number of items to the component set. |
||
| 1165 | * |
||
| 1166 | * @param array $items Items to add, as either DataObjects or IDs. |
||
| 1167 | * @return $this |
||
| 1168 | */ |
||
| 1169 | public function addMany($items) |
||
| 1170 | { |
||
| 1171 | foreach ($items as $item) { |
||
| 1172 | $this->add($item); |
||
| 1173 | } |
||
| 1174 | return $this; |
||
| 1175 | } |
||
| 1176 | |||
| 1177 | /** |
||
| 1178 | * Remove the items from this list with the given IDs |
||
| 1179 | * |
||
| 1180 | * @param array $idList |
||
| 1181 | * @return $this |
||
| 1182 | */ |
||
| 1183 | public function removeMany($idList) |
||
| 1184 | { |
||
| 1185 | foreach ($idList as $id) { |
||
| 1186 | $this->removeByID($id); |
||
| 1187 | } |
||
| 1188 | return $this; |
||
| 1189 | } |
||
| 1190 | |||
| 1191 | /** |
||
| 1192 | * Remove every element in this DataList matching the given $filter. |
||
| 1193 | * |
||
| 1194 | * @param string|array $filter - a sql type where filter |
||
| 1195 | * @return $this |
||
| 1196 | */ |
||
| 1197 | public function removeByFilter($filter) |
||
| 1198 | { |
||
| 1199 | foreach ($this->where($filter) as $item) { |
||
| 1200 | $this->remove($item); |
||
| 1201 | } |
||
| 1202 | return $this; |
||
| 1203 | } |
||
| 1204 | |||
| 1205 | /** |
||
| 1206 | * Shuffle the datalist using a random function provided by the SQL engine |
||
| 1207 | * |
||
| 1208 | * @return $this |
||
| 1209 | */ |
||
| 1210 | public function shuffle() |
||
| 1211 | { |
||
| 1212 | return $this->sort(DB::get_conn()->random()); |
||
| 1213 | } |
||
| 1214 | |||
| 1215 | /** |
||
| 1216 | * Remove every element in this DataList. |
||
| 1217 | * |
||
| 1218 | * @return $this |
||
| 1219 | */ |
||
| 1220 | public function removeAll() |
||
| 1221 | { |
||
| 1222 | foreach ($this as $item) { |
||
| 1223 | $this->remove($item); |
||
| 1224 | } |
||
| 1225 | return $this; |
||
| 1226 | } |
||
| 1227 | |||
| 1228 | /** |
||
| 1229 | * This method are overloaded by HasManyList and ManyMany list to perform more sophisticated |
||
| 1230 | * list manipulation |
||
| 1231 | * |
||
| 1232 | * @param mixed $item |
||
| 1233 | */ |
||
| 1234 | public function add($item) |
||
| 1235 | { |
||
| 1236 | // Nothing needs to happen by default |
||
| 1237 | // TO DO: If a filter is given to this data list then |
||
| 1238 | } |
||
| 1239 | |||
| 1240 | /** |
||
| 1241 | * Return a new item to add to this DataList. |
||
| 1242 | * |
||
| 1243 | * @todo This doesn't factor in filters. |
||
| 1244 | * @param array $initialFields |
||
| 1245 | * @return DataObject |
||
| 1246 | */ |
||
| 1247 | public function newObject($initialFields = null) |
||
| 1248 | { |
||
| 1249 | $class = $this->dataClass; |
||
| 1250 | return Injector::inst()->create($class, $initialFields, false); |
||
| 1251 | } |
||
| 1252 | |||
| 1253 | /** |
||
| 1254 | * Remove this item by deleting it |
||
| 1255 | * |
||
| 1256 | * @param DataObject $item |
||
| 1257 | * @todo Allow for amendment of this behaviour - for example, we can remove an item from |
||
| 1258 | * an "ActiveItems" DataList by chaning the status to inactive. |
||
| 1259 | */ |
||
| 1260 | public function remove($item) |
||
| 1261 | { |
||
| 1262 | // By default, we remove an item from a DataList by deleting it. |
||
| 1263 | $this->removeByID($item->ID); |
||
| 1264 | } |
||
| 1265 | |||
| 1266 | /** |
||
| 1267 | * Remove an item from this DataList by ID |
||
| 1268 | * |
||
| 1269 | * @param int $itemID The primary ID |
||
| 1270 | */ |
||
| 1271 | public function removeByID($itemID) |
||
| 1272 | { |
||
| 1273 | $item = $this->byID($itemID); |
||
| 1274 | |||
| 1275 | if ($item) { |
||
| 1276 | $item->delete(); |
||
| 1277 | } |
||
| 1278 | } |
||
| 1279 | |||
| 1280 | /** |
||
| 1281 | * Reverses a list of items. |
||
| 1282 | * |
||
| 1283 | * @return static |
||
| 1284 | */ |
||
| 1285 | public function reverse() |
||
| 1289 | }); |
||
| 1290 | } |
||
| 1291 | |||
| 1292 | /** |
||
| 1293 | * Returns whether an item with $key exists |
||
| 1294 | * |
||
| 1295 | * @param mixed $key |
||
| 1296 | * @return bool |
||
| 1297 | */ |
||
| 1298 | public function offsetExists($key) |
||
| 1299 | { |
||
| 1300 | return ($this->limit(1, $key)->first() != null); |
||
| 1301 | } |
||
| 1302 | |||
| 1303 | /** |
||
| 1304 | * Returns item stored in list with index $key |
||
| 1305 | * |
||
| 1306 | * @param mixed $key |
||
| 1307 | * @return DataObject |
||
| 1308 | */ |
||
| 1309 | public function offsetGet($key) |
||
| 1310 | { |
||
| 1311 | return $this->limit(1, $key)->first(); |
||
| 1312 | } |
||
| 1313 | |||
| 1314 | /** |
||
| 1315 | * Set an item with the key in $key |
||
| 1316 | * |
||
| 1317 | * @param mixed $key |
||
| 1318 | * @param mixed $value |
||
| 1319 | */ |
||
| 1320 | public function offsetSet($key, $value) |
||
| 1321 | { |
||
| 1322 | user_error("Can't alter items in a DataList using array-access", E_USER_ERROR); |
||
| 1323 | } |
||
| 1324 | |||
| 1325 | /** |
||
| 1326 | * Unset an item with the key in $key |
||
| 1327 | * |
||
| 1328 | * @param mixed $key |
||
| 1329 | */ |
||
| 1330 | public function offsetUnset($key) |
||
| 1331 | { |
||
| 1332 | user_error("Can't alter items in a DataList using array-access", E_USER_ERROR); |
||
| 1333 | } |
||
| 1334 | } |
||
| 1335 |
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