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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db;
/**
* ActiveQueryTrait implements the common methods and properties for active record query classes.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @author Carsten Brandt <mail@cebe.cc>
* @since 2.0
*/
trait ActiveQueryTrait
{
/**
* @var string the name of the ActiveRecord class.
*/
public $modelClass;
/**
* @var array a list of relations that this query should be performed with
*/
public $with;
/**
* @var bool whether to return each record as an array. If false (default), an object
* of [[modelClass]] will be created to represent each record.
*/
public $asArray;
/**
* Sets the [[asArray]] property.
* @param bool $value whether to return the query results in terms of arrays instead of Active Records.
* @return $this the query object itself
*/
public function asArray($value = true)
{
$this->asArray = $value;
return $this;
}
/**
* Specifies the relations with which this query should be performed.
*
* The parameters to this method can be either one or multiple strings, or a single array
* of relation names and the optional callbacks to customize the relations.
*
* A relation name can refer to a relation defined in [[modelClass]]
* or a sub-relation that stands for a relation of a related record.
* For example, `orders.address` means the `address` relation defined
* in the model class corresponding to the `orders` relation.
*
* The following are some usage examples:
*
* ```php
* // find customers together with their orders and country
* Customer::find()->with('orders', 'country')->all();
* // find customers together with their orders and the orders' shipping address
* Customer::find()->with('orders.address')->all();
* // find customers together with their country and orders of status 1
* Customer::find()->with([
* 'orders' => function (\yii\db\ActiveQuery $query) {
* $query->andWhere('status = 1');
* },
* 'country',
* ])->all();
* ```
*
* You can call `with()` multiple times. Each call will add relations to the existing ones.
* For example, the following two statements are equivalent:
*
* ```php
* Customer::find()->with('orders', 'country')->all();
* Customer::find()->with('orders')->with('country')->all();
* ```
*
* @return $this the query object itself
*/
public function with()
{
$with = func_get_args();
if (isset($with[0]) && is_array($with[0])) {
// the parameter is given as an array
$with = $with[0];
}
if (empty($this->with)) {
$this->with = $with;
} elseif (!empty($with)) {
foreach ($with as $name => $value) {
if (is_int($name)) {
// repeating relation is fine as normalizeRelations() handle it well
$this->with[] = $value;
} else {
$this->with[$name] = $value;
}
}
}
return $this;
}
/**
* Converts found rows into model instances.
* @param array $rows
* @return array|ActiveRecord[]
* @since 2.0.11
*/
protected function createModels($rows)
{
if ($this->asArray) {
return $rows;
} else {
$models = [];
/* @var $class ActiveRecord */
$class = $this->modelClass;
foreach ($rows as $row) {
$model = $class::instantiate($row);
$modelClass = get_class($model);
$modelClass::populateRecord($model, $row);
$models[] = $model;
}
return $models;
}
}
/**
* Finds records corresponding to one or multiple relations and populates them into the primary models.
* @param array $with a list of relations that this query should be performed with. Please
* refer to [[with()]] for details about specifying this parameter.
* @param array|ActiveRecord[] $models the primary models (can be either AR instances or arrays)
*/
public function findWith($with, &$models)
{
$primaryModel = reset($models);
if (!$primaryModel instanceof ActiveRecordInterface) {
/* @var $modelClass ActiveRecordInterface */
$modelClass = $this->modelClass;
$primaryModel = $modelClass::instance();
}
$relations = $this->normalizeRelations($primaryModel, $with);
/* @var $relation ActiveQuery */
foreach ($relations as $name => $relation) {
if ($relation->asArray === null) {
// inherit asArray from primary query
$relation->asArray($this->asArray);
}
$relation->populateRelation($name, $models);
}
}
/**
* @param ActiveRecord $model
* @param array $with
* @return ActiveQueryInterface[]
*/
private function normalizeRelations($model, $with)
{
$relations = [];
foreach ($with as $name => $callback) {
if (is_int($name)) {
$name = $callback;
$callback = null;
}
if (($pos = strpos($name, '.')) !== false) {
// with sub-relations
$childName = substr($name, $pos + 1);
$name = substr($name, 0, $pos);
} else {
$childName = null;
}
if (!isset($relations[$name])) {
$relation = $model->getRelation($name);
$relation->primaryModel = null;
$relations[$name] = $relation;
} else {
$relation = $relations[$name];
}
if (isset($childName)) {
$relation->with[$childName] = $callback;
} elseif ($callback !== null) {
call_user_func($callback, $relation);
}
}
return $relations;
}
}