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<?php |
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namespace ntentan\nibii; |
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use ntentan\nibii\exceptions\FieldNotFoundException; |
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use ntentan\nibii\exceptions\NibiiException; |
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/** |
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* Holds parameters used for the fields, where clauses, limits and offsets in queries |
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* |
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* @author ekow |
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*/ |
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class QueryParameters |
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{ |
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/** |
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* The where clause string of the query parameters. |
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* |
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* @var string |
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*/ |
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private $whereClause; |
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/** |
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* The string used for conjuctions. |
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* This could either be 'AND' and or an 'OR' operator. |
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* |
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* @var string |
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*/ |
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private $conjunction = ''; |
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/** |
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* Data that will be bound when a query is executed with this object. |
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* |
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* @var array |
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*/ |
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private $boundData = []; |
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/** |
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* This flag is set to true whenever there is bound data prepared. |
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* |
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* @var bool |
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*/ |
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private $preparedBoundData = false; |
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/** |
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* A list of fields that have arrays bound to them. |
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* |
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* @var array |
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*/ |
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private $boundArrays = []; |
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/** |
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* A list of fields that should be returned for the query. |
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* |
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* @var array |
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*/ |
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private $fields = []; |
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/** |
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* The database table to be queried. |
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* |
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* @var null|string |
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*/ |
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private $table; |
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/** |
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* When this flag is set, only the first item in the query is returned. |
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* It essentially forces a limit of 1. |
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* |
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* @var bool |
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*/ |
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private $firstOnly = false; |
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/** |
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* The number of records to return after the query. |
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* |
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* @var int |
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*/ |
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private $limit; |
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/** |
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* The number of items to skip in the query. |
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* |
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* @var int |
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*/ |
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private $offset; |
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/** |
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* Holds a list of sorted fields, sort order and the order by which they should all be sorted. |
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* |
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* @var array |
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*/ |
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private $sorts = []; |
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/** |
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* QueryParameters constructor |
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* |
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* @param string $table The name of the table |
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*/ |
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public function __construct($table = null) |
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{ |
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$this->table = $table; |
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} |
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/** |
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* Get the comma seperated list of fields for the query. |
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* In cases where no fields have been specifid, the wildcard * is returned. |
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* |
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* @return string |
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*/ |
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public function getFields() |
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{ |
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$fields = '*'; |
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if (count($this->fields) > 0) { |
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$fields = implode(', ', $this->fields); |
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} |
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return $fields; |
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} |
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/** |
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* Set an array of fields that this query should return. |
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* |
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* @param array $fields |
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* @return $this |
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*/ |
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public function setFields(array $fields) |
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{ |
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$this->fields = $fields; |
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return $this; |
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} |
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/** |
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* Get the table for this query. |
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* |
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* @return null|string |
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*/ |
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public function getTable() |
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{ |
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return $this->table; |
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} |
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/** |
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* Set the table for this query. |
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* |
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* @param $table |
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* @return $this For chaining |
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*/ |
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public function setTable($table) |
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{ |
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$this->table = $table; |
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return $this; |
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} |
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/** |
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* Gets the limit clause of the query. |
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* |
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* @return null|string |
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*/ |
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public function getLimit() |
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{ |
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return $this->limit > 0 ? " LIMIT {$this->limit}" : null; |
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} |
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public function getOffset() |
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{ |
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return $this->offset > 0 ? " OFFSET {$this->offset}" : null; |
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} |
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public function getWhereClause() |
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{ |
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if ($this->whereClause) { |
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foreach ($this->boundArrays as $boundArray) { |
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$where = ""; |
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$comma = ""; |
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for ($i = 0; $i < count($this->boundData[$boundArray]); $i++) { |
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$where .= "{$comma}:{$boundArray}_{$i}"; |
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$comma = ', '; |
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} |
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$this->whereClause = str_replace("%{$boundArray}%", $where, $this->whereClause); |
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} |
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} |
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return $this->whereClause ? " WHERE {$this->whereClause}" : ''; |
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} |
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public function getBoundData() |
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{ |
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if ($this->preparedBoundData === false) { |
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$this->preparedBoundData = []; |
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foreach ($this->boundData as $key => $value) { |
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if (in_array($key, $this->boundArrays)) { |
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foreach ($value as $i => $v) { |
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$this->preparedBoundData["{$key}_{$i}"] = $v; |
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} |
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} else { |
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$this->preparedBoundData[$key] = $value; |
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} |
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} |
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} |
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return $this->preparedBoundData; |
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} |
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public function setBoundData($field, $value) |
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{ |
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if (array_key_exists($field, $this->boundData)) { |
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$isArray = is_array($value); |
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$boundArray = in_array($field, $this->boundArrays); |
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if ($isArray && !$boundArray) { |
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throw new NibiiException("The field '{$field}' cannot be bound to an array"); |
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} else if (!$isArray && $boundArray) { |
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throw new NibiiException("The field '{$field}' must be bound to an array"); |
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} |
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$this->boundData[$field] = $value; |
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$this->preparedBoundData = false; |
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return $this; |
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} |
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throw new FieldNotFoundException("The field '{$field}' has not been bound to the current query"); |
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} |
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public function getSorts() |
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{ |
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return count($this->sorts) ? " ORDER BY " . implode(", ", $this->sorts) : null; |
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} |
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public function addFilter($field, $values = null) |
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{ |
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$this->whereClause .= $this->conjunction; |
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if (is_array($values)) { |
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$this->whereClause .= "{$field} IN (%{$field}%)"; |
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$this->boundArrays[] = $field; |
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$this->boundData[$field] = $values; |
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} else { |
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if ($values === null) { |
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$this->whereClause .= "{$field} is NULL"; |
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} else { |
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$this->whereClause .= "{$field} = :$field"; |
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$this->boundData[$field] = $values; |
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} |
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} |
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$this->conjunction = ' AND '; |
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return $this; |
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} |
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public function setFilter($filter, $values) |
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{ |
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$filterCompiler = new FilterCompiler(); |
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$compiledFilter = $filterCompiler->compile($filter); |
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$compiledValues = $filterCompiler->rewriteBoundData($values); |
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$this->whereClause .= "{$this->conjunction}$compiledFilter"; |
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$this->boundData += $compiledValues; |
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} |
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/** |
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* @param boolean $firstOnly |
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* @return $this |
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*/ |
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public function setFirstOnly($firstOnly) |
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{ |
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$this->firstOnly = $firstOnly; |
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return $this; |
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} |
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public function getFirstOnly() |
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{ |
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return $this->firstOnly; |
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} |
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public function setLimit($numItems) |
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{ |
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$this->limit = $numItems; |
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} |
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public function setOffset($offset) |
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{ |
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$this->offset = $offset; |
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} |
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/** |
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* @param string $field |
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* @param string $direction |
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*/ |
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public function addSort($field, $direction = 'ASC') |
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{ |
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$this->sorts[] = "$field $direction"; |
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} |
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} |
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Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a
@returnannotation as described here.