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175 lines
5.3 KiB
175 lines
5.3 KiB
<?php |
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/** |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\mongodb; |
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use yii\db\ActiveQueryInterface; |
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use yii\db\ActiveQueryTrait; |
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use yii\db\ActiveRelationTrait; |
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/** |
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* ActiveQuery represents a Mongo query associated with an Active Record class. |
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* |
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* An ActiveQuery can be a normal query or be used in a relational context. |
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* |
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* ActiveQuery instances are usually created by [[ActiveRecord::find()]]. |
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* Relational queries are created by [[ActiveRecord::hasOne()]] and [[ActiveRecord::hasMany()]]. |
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* |
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* Normal Query |
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* ------------ |
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* |
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* ActiveQuery instances are usually created by [[ActiveRecord::find()]]. |
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* |
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* Because ActiveQuery extends from [[Query]], one can use query methods, such as [[where()]], |
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* [[orderBy()]] to customize the query options. |
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* |
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* ActiveQuery also provides the following additional query options: |
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* |
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* - [[with()]]: list of relations that this query should be performed with. |
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* - [[asArray()]]: whether to return each record as an array. |
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* |
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* These options can be configured using methods of the same name. For example: |
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* |
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* ```php |
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* $customers = Customer::find()->with('orders')->asArray()->all(); |
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* ``` |
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* |
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* Relational query |
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* ---------------- |
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* |
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* In relational context ActiveQuery represents a relation between two Active Record classes. |
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* |
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* Relational ActiveQuery instances are usually created by calling [[ActiveRecord::hasOne()]] and |
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* [[ActiveRecord::hasMany()]]. An Active Record class declares a relation by defining |
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* a getter method which calls one of the above methods and returns the created ActiveQuery object. |
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* |
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* A relation is specified by [[link]] which represents the association between columns |
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* of different tables; and the multiplicity of the relation is indicated by [[multiple]]. |
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* |
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* If a relation involves a pivot table, it may be specified by [[via()]]. |
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* This methods may only be called in a relational context. Same is true for [[inverseOf()]], which |
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* marks a relation as inverse of another relation. |
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* |
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* @property Collection $collection Collection instance. This property is read-only. |
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* |
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* @author Paul Klimov <klimov.paul@gmail.com> |
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* @since 2.0 |
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*/ |
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class ActiveQuery extends Query implements ActiveQueryInterface |
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{ |
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use ActiveQueryTrait; |
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use ActiveRelationTrait; |
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/** |
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* @inheritdoc |
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*/ |
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protected function buildCursor($db = null) |
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{ |
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if ($this->primaryModel !== null) { |
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// lazy loading |
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if ($this->via instanceof self) { |
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// via pivot collection |
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$viaModels = $this->via->findPivotRows([$this->primaryModel]); |
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$this->filterByModels($viaModels); |
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} elseif (is_array($this->via)) { |
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// via relation |
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/** @var ActiveQuery $viaQuery */ |
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list($viaName, $viaQuery) = $this->via; |
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if ($viaQuery->multiple) { |
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$viaModels = $viaQuery->all(); |
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$this->primaryModel->populateRelation($viaName, $viaModels); |
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} else { |
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$model = $viaQuery->one(); |
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$this->primaryModel->populateRelation($viaName, $model); |
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$viaModels = $model === null ? [] : [$model]; |
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} |
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$this->filterByModels($viaModels); |
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} else { |
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$this->filterByModels([$this->primaryModel]); |
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} |
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} |
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return parent::buildCursor($db); |
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} |
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/** |
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* Executes query and returns all results as an array. |
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* @param Connection $db the Mongo connection used to execute the query. |
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* If null, the Mongo connection returned by [[modelClass]] will be used. |
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* @return array the query results. If the query results in nothing, an empty array will be returned. |
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*/ |
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public function all($db = null) |
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{ |
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$cursor = $this->buildCursor($db); |
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$rows = $this->fetchRows($cursor); |
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if (!empty($rows)) { |
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$models = $this->createModels($rows); |
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if (!empty($this->with)) { |
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$this->findWith($this->with, $models); |
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} |
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if (!$this->asArray) { |
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foreach($models as $model) { |
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$model->afterFind(); |
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} |
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} |
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return $models; |
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} else { |
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return []; |
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} |
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} |
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/** |
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* Executes query and returns a single row of result. |
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* @param Connection $db the Mongo connection used to execute the query. |
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* If null, the Mongo connection returned by [[modelClass]] will be used. |
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* @return ActiveRecord|array|null a single row of query result. Depending on the setting of [[asArray]], |
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* the query result may be either an array or an ActiveRecord object. Null will be returned |
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* if the query results in nothing. |
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*/ |
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public function one($db = null) |
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{ |
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$row = parent::one($db); |
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if ($row !== false) { |
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if ($this->asArray) { |
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$model = $row; |
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} else { |
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/** @var ActiveRecord $class */ |
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$class = $this->modelClass; |
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$model = $class::instantiate($row); |
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$class::populateRecord($model, $row); |
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} |
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if (!empty($this->with)) { |
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$models = [$model]; |
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$this->findWith($this->with, $models); |
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$model = $models[0]; |
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} |
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if (!$this->asArray) { |
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$model->afterFind(); |
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} |
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return $model; |
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} else { |
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return null; |
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} |
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} |
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/** |
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* Returns the Mongo collection for this query. |
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* @param Connection $db Mongo connection. |
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* @return Collection collection instance. |
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*/ |
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public function getCollection($db = null) |
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{ |
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/** @var ActiveRecord $modelClass */ |
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$modelClass = $this->modelClass; |
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if ($db === null) { |
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$db = $modelClass::getDb(); |
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} |
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if ($this->from === null) { |
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$this->from = $modelClass::collectionName(); |
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} |
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return $db->getCollection($this->from); |
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} |
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} |