mirror of
https://github.com/yiisoft/yii2.git
synced 2025-08-16 15:21:13 +08:00
456 lines
17 KiB
PHP
456 lines
17 KiB
PHP
<?php
|
|
/**
|
|
* @link http://www.yiiframework.com/
|
|
* @copyright Copyright (c) 2008 Yii Software LLC
|
|
* @license http://www.yiiframework.com/license/
|
|
*/
|
|
|
|
namespace yii\db;
|
|
|
|
use yii\base\InvalidConfigException;
|
|
use yii\base\InvalidParamException;
|
|
|
|
/**
|
|
* ActiveRelationTrait implements the common methods and properties for active record relational queries.
|
|
*
|
|
* @author Qiang Xue <qiang.xue@gmail.com>
|
|
* @author Carsten Brandt <mail@cebe.cc>
|
|
* @since 2.0
|
|
*/
|
|
trait ActiveRelationTrait
|
|
{
|
|
/**
|
|
* @var boolean whether this query represents a relation to more than one record.
|
|
* This property is only used in relational context. If true, this relation will
|
|
* populate all query results into AR instances using [[all()]].
|
|
* If false, only the first row of the results will be retrieved using [[one()]].
|
|
*/
|
|
public $multiple;
|
|
/**
|
|
* @var ActiveRecord the primary model of a relational query.
|
|
* This is used only in lazy loading with dynamic query options.
|
|
*/
|
|
public $primaryModel;
|
|
/**
|
|
* @var array the columns of the primary and foreign tables that establish a relation.
|
|
* The array keys must be columns of the table for this relation, and the array values
|
|
* must be the corresponding columns from the primary table.
|
|
* Do not prefix or quote the column names as this will be done automatically by Yii.
|
|
* This property is only used in relational context.
|
|
*/
|
|
public $link;
|
|
/**
|
|
* @var array the query associated with the pivot table. Please call [[via()]]
|
|
* to set this property instead of directly setting it.
|
|
* This property is only used in relational context.
|
|
* @see via()
|
|
*/
|
|
public $via;
|
|
/**
|
|
* @var string the name of the relation that is the inverse of this relation.
|
|
* For example, an order has a customer, which means the inverse of the "customer" relation
|
|
* is the "orders", and the inverse of the "orders" relation is the "customer".
|
|
* If this property is set, the primary record(s) will be referenced through the specified relation.
|
|
* For example, `$customer->orders[0]->customer` and `$customer` will be the same object,
|
|
* and accessing the customer of an order will not trigger new DB query.
|
|
* This property is only used in relational context.
|
|
* @see inverseOf()
|
|
*/
|
|
public $inverseOf;
|
|
|
|
/**
|
|
* Clones internal objects.
|
|
*/
|
|
public function __clone()
|
|
{
|
|
parent::__clone();
|
|
// make a clone of "via" object so that the same query object can be reused multiple times
|
|
if (is_object($this->via)) {
|
|
$this->via = clone $this->via;
|
|
} elseif (is_array($this->via)) {
|
|
$this->via = [$this->via[0], clone $this->via[1]];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Specifies the relation associated with the pivot table.
|
|
*
|
|
* Use this method to specify a pivot record/table when declaring a relation in the [[ActiveRecord]] class:
|
|
*
|
|
* ```php
|
|
* public function getOrders()
|
|
* {
|
|
* return $this->hasOne(Order::className(), ['id' => 'order_id']);
|
|
* }
|
|
*
|
|
* public function getOrderItems()
|
|
* {
|
|
* return $this->hasMany(Item::className(), ['id' => 'item_id'])
|
|
* ->via('orders', ['order_id' => 'id']);
|
|
* }
|
|
* ```
|
|
*
|
|
* @param string $relationName the relation name. This refers to a relation declared in [[primaryModel]].
|
|
* @param callable $callable a PHP callback for customizing the relation associated with the pivot table.
|
|
* Its signature should be `function($query)`, where `$query` is the query to be customized.
|
|
* @return static the relation object itself.
|
|
*/
|
|
public function via($relationName, $callable = null)
|
|
{
|
|
$relation = $this->primaryModel->getRelation($relationName);
|
|
$this->via = [$relationName, $relation];
|
|
if ($callable !== null) {
|
|
call_user_func($callable, $relation);
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Sets the name of the relation that is the inverse of this relation.
|
|
* For example, an order has a customer, which means the inverse of the "customer" relation
|
|
* is the "orders", and the inverse of the "orders" relation is the "customer".
|
|
* If this property is set, the primary record(s) will be referenced through the specified relation.
|
|
* For example, `$customer->orders[0]->customer` and `$customer` will be the same object,
|
|
* and accessing the customer of an order will not trigger a new DB query.
|
|
*
|
|
* Use this method when declaring a relation in the [[ActiveRecord]] class:
|
|
*
|
|
* ```php
|
|
* public function getOrders()
|
|
* {
|
|
* return $this->hasMany(Order::className(), ['customer_id' => 'id'])->inverseOf('customer');
|
|
* }
|
|
* ```
|
|
*
|
|
* @param string $relationName the name of the relation that is the inverse of this relation.
|
|
* @return static the relation object itself.
|
|
*/
|
|
public function inverseOf($relationName)
|
|
{
|
|
$this->inverseOf = $relationName;
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Finds the related records for the specified primary record.
|
|
* This method is invoked when a relation of an ActiveRecord is being accessed in a lazy fashion.
|
|
* @param string $name the relation name
|
|
* @param ActiveRecordInterface|BaseActiveRecord $model the primary model
|
|
* @return mixed the related record(s)
|
|
* @throws InvalidParamException if the relation is invalid
|
|
*/
|
|
public function findFor($name, $model)
|
|
{
|
|
if (method_exists($model, 'get' . $name)) {
|
|
$method = new \ReflectionMethod($model, 'get' . $name);
|
|
$realName = lcfirst(substr($method->getName(), 3));
|
|
if ($realName !== $name) {
|
|
throw new InvalidParamException('Relation names are case sensitive. ' . get_class($model) . " has a relation named \"$realName\" instead of \"$name\".");
|
|
}
|
|
}
|
|
|
|
$related = $this->multiple ? $this->all() : $this->one();
|
|
|
|
if ($this->inverseOf === null || empty($related)) {
|
|
return $related;
|
|
}
|
|
|
|
$inverseRelation = (new $this->modelClass)->getRelation($this->inverseOf);
|
|
|
|
if ($this->multiple) {
|
|
foreach ($related as $i => $relatedModel) {
|
|
if ($relatedModel instanceof ActiveRecordInterface) {
|
|
$relatedModel->populateRelation($this->inverseOf, $inverseRelation->multiple ? [$model] : $model);
|
|
} else {
|
|
$related[$i][$this->inverseOf] = $inverseRelation->multiple ? [$model] : $model;
|
|
}
|
|
}
|
|
} else {
|
|
if ($related instanceof ActiveRecordInterface) {
|
|
$related->populateRelation($this->inverseOf, $inverseRelation->multiple ? [$model] : $model);
|
|
} else {
|
|
$related[$this->inverseOf] = $inverseRelation->multiple ? [$model] : $model;
|
|
}
|
|
}
|
|
|
|
return $related;
|
|
}
|
|
|
|
/**
|
|
* Finds the related records and populates them into the primary models.
|
|
* @param string $name the relation name
|
|
* @param array $primaryModels primary models
|
|
* @return array the related models
|
|
* @throws InvalidConfigException if [[link]] is invalid
|
|
*/
|
|
public function populateRelation($name, &$primaryModels)
|
|
{
|
|
if (!is_array($this->link)) {
|
|
throw new InvalidConfigException('Invalid link: it must be an array of key-value pairs.');
|
|
}
|
|
|
|
if ($this->via instanceof self) {
|
|
// via pivot table
|
|
/** @var ActiveRelationTrait $viaQuery */
|
|
$viaQuery = $this->via;
|
|
$viaModels = $viaQuery->findPivotRows($primaryModels);
|
|
$this->filterByModels($viaModels);
|
|
} elseif (is_array($this->via)) {
|
|
// via relation
|
|
/** @var ActiveRelationTrait $viaQuery */
|
|
list($viaName, $viaQuery) = $this->via;
|
|
$viaQuery->primaryModel = null;
|
|
$viaModels = $viaQuery->populateRelation($viaName, $primaryModels);
|
|
$this->filterByModels($viaModels);
|
|
} else {
|
|
$this->filterByModels($primaryModels);
|
|
}
|
|
|
|
if (count($primaryModels) === 1 && !$this->multiple) {
|
|
$model = $this->one();
|
|
foreach ($primaryModels as $i => $primaryModel) {
|
|
if ($primaryModel instanceof ActiveRecordInterface) {
|
|
$primaryModel->populateRelation($name, $model);
|
|
} else {
|
|
$primaryModels[$i][$name] = $model;
|
|
}
|
|
if ($this->inverseOf !== null) {
|
|
$this->populateInverseRelation($primaryModels, [$model], $name, $this->inverseOf);
|
|
}
|
|
}
|
|
|
|
return [$model];
|
|
} else {
|
|
$models = $this->all();
|
|
if (isset($viaModels, $viaQuery)) {
|
|
$buckets = $this->buildBuckets($models, $this->link, $viaModels, $viaQuery->link);
|
|
} else {
|
|
$buckets = $this->buildBuckets($models, $this->link);
|
|
}
|
|
|
|
$link = array_values(isset($viaQuery) ? $viaQuery->link : $this->link);
|
|
foreach ($primaryModels as $i => $primaryModel) {
|
|
$key = $this->getModelKey($primaryModel, $link);
|
|
$value = isset($buckets[$key]) ? $buckets[$key] : ($this->multiple ? [] : null);
|
|
if ($primaryModel instanceof ActiveRecordInterface) {
|
|
$primaryModel->populateRelation($name, $value);
|
|
} else {
|
|
$primaryModels[$i][$name] = $value;
|
|
}
|
|
}
|
|
if ($this->inverseOf !== null) {
|
|
$this->populateInverseRelation($primaryModels, $models, $name, $this->inverseOf);
|
|
}
|
|
|
|
return $models;
|
|
}
|
|
}
|
|
|
|
private function populateInverseRelation(&$primaryModels, $models, $primaryName, $name)
|
|
{
|
|
if (empty($models) || empty($primaryModels)) {
|
|
return;
|
|
}
|
|
$model = reset($models);
|
|
$relation = $model instanceof ActiveRecordInterface ? $model->getRelation($name) : (new $this->modelClass)->getRelation($name);
|
|
|
|
if ($relation->multiple) {
|
|
$buckets = $this->buildBuckets($primaryModels, $relation->link, null, null, false);
|
|
if ($model instanceof ActiveRecordInterface) {
|
|
foreach ($models as $model) {
|
|
$key = $this->getModelKey($model, $relation->link);
|
|
$model->populateRelation($name, isset($buckets[$key]) ? $buckets[$key] : []);
|
|
}
|
|
} else {
|
|
foreach ($primaryModels as $i => $primaryModel) {
|
|
if ($this->multiple) {
|
|
foreach ($primaryModel as $j => $m) {
|
|
$key = $this->getModelKey($m, $relation->link);
|
|
$primaryModels[$i][$j][$name] = isset($buckets[$key]) ? $buckets[$key] : [];
|
|
}
|
|
} elseif (!empty($primaryModel[$primaryName])) {
|
|
$key = $this->getModelKey($primaryModel[$primaryName], $relation->link);
|
|
$primaryModels[$i][$primaryName][$name] = isset($buckets[$key]) ? $buckets[$key] : [];
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if ($this->multiple) {
|
|
foreach ($primaryModels as $i => $primaryModel) {
|
|
foreach ($primaryModel[$primaryName] as $j => $m) {
|
|
if ($m instanceof ActiveRecordInterface) {
|
|
$m->populateRelation($name, $primaryModel);
|
|
} else {
|
|
$primaryModels[$i][$primaryName][$j][$name] = $primaryModel;
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
foreach ($primaryModels as $i => $primaryModel) {
|
|
if ($primaryModels[$i][$primaryName] instanceof ActiveRecordInterface) {
|
|
$primaryModels[$i][$primaryName]->populateRelation($name, $primaryModel);
|
|
} elseif (!empty($primaryModels[$i][$primaryName])) {
|
|
$primaryModels[$i][$primaryName][$name] = $primaryModel;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param array $models
|
|
* @param array $link
|
|
* @param array $viaModels
|
|
* @param array $viaLink
|
|
* @param boolean $checkMultiple
|
|
* @return array
|
|
*/
|
|
private function buildBuckets($models, $link, $viaModels = null, $viaLink = null, $checkMultiple = true)
|
|
{
|
|
if ($viaModels !== null) {
|
|
$map = [];
|
|
$viaLinkKeys = array_keys($viaLink);
|
|
$linkValues = array_values($link);
|
|
foreach ($viaModels as $viaModel) {
|
|
$key1 = $this->getModelKey($viaModel, $viaLinkKeys);
|
|
$key2 = $this->getModelKey($viaModel, $linkValues);
|
|
$map[$key2][$key1] = true;
|
|
}
|
|
}
|
|
|
|
$buckets = [];
|
|
$linkKeys = array_keys($link);
|
|
|
|
if (isset($map)) {
|
|
foreach ($models as $i => $model) {
|
|
$key = $this->getModelKey($model, $linkKeys);
|
|
if (isset($map[$key])) {
|
|
foreach (array_keys($map[$key]) as $key2) {
|
|
if ($this->indexBy !== null) {
|
|
$buckets[$key2][$i] = $model;
|
|
} else {
|
|
$buckets[$key2][] = $model;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
foreach ($models as $i => $model) {
|
|
$key = $this->getModelKey($model, $linkKeys);
|
|
if ($this->indexBy !== null) {
|
|
$buckets[$key][$i] = $model;
|
|
} else {
|
|
$buckets[$key][] = $model;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($checkMultiple && !$this->multiple) {
|
|
foreach ($buckets as $i => $bucket) {
|
|
$buckets[$i] = reset($bucket);
|
|
}
|
|
}
|
|
|
|
return $buckets;
|
|
}
|
|
|
|
private function prefixKeyColumns($attributes)
|
|
{
|
|
if ($this instanceof ActiveQuery && (!empty($this->join) || !empty($this->joinWith))) {
|
|
if (empty($this->from)) {
|
|
/** @var ActiveRecord $modelClass */
|
|
$modelClass = $this->modelClass;
|
|
$alias = $modelClass::tableName();
|
|
} else {
|
|
foreach ($this->from as $alias => $table) {
|
|
if (!is_string($alias)) {
|
|
$alias = $table;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (isset($alias)) {
|
|
foreach ($attributes as $i => $attribute) {
|
|
$attributes[$i] = "$alias.$attribute";
|
|
}
|
|
}
|
|
}
|
|
return $attributes;
|
|
}
|
|
|
|
/**
|
|
* @param array $models
|
|
*/
|
|
private function filterByModels($models)
|
|
{
|
|
$attributes = array_keys($this->link);
|
|
|
|
$attributes = $this->prefixKeyColumns($attributes);
|
|
|
|
$values = [];
|
|
if (count($attributes) === 1) {
|
|
// single key
|
|
$attribute = reset($this->link);
|
|
foreach ($models as $model) {
|
|
if (($value = $model[$attribute]) !== null) {
|
|
$values[] = $value;
|
|
}
|
|
}
|
|
} else {
|
|
// composite keys
|
|
foreach ($models as $model) {
|
|
$v = [];
|
|
foreach ($this->link as $attribute => $link) {
|
|
$v[$attribute] = $model[$link];
|
|
}
|
|
$values[] = $v;
|
|
}
|
|
}
|
|
$this->andWhere(['in', $attributes, array_unique($values, SORT_REGULAR)]);
|
|
}
|
|
|
|
/**
|
|
* @param ActiveRecord|array $model
|
|
* @param array $attributes
|
|
* @return string
|
|
*/
|
|
private function getModelKey($model, $attributes)
|
|
{
|
|
if (count($attributes) > 1) {
|
|
$key = [];
|
|
foreach ($attributes as $attribute) {
|
|
$key[] = $model[$attribute];
|
|
}
|
|
|
|
return serialize($key);
|
|
} else {
|
|
$attribute = reset($attributes);
|
|
$key = $model[$attribute];
|
|
|
|
return is_scalar($key) ? $key : serialize($key);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param array $primaryModels either array of AR instances or arrays
|
|
* @return array
|
|
*/
|
|
private function findPivotRows($primaryModels)
|
|
{
|
|
if (empty($primaryModels)) {
|
|
return [];
|
|
}
|
|
$this->filterByModels($primaryModels);
|
|
/** @var ActiveRecord $primaryModel */
|
|
$primaryModel = reset($primaryModels);
|
|
if (!$primaryModel instanceof ActiveRecordInterface) {
|
|
// when primaryModels are array of arrays (asArray case)
|
|
$primaryModel = new $this->modelClass;
|
|
}
|
|
|
|
return $this->asArray()->all($primaryModel->getDb());
|
|
}
|
|
}
|