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627 lines
23 KiB
PHP
627 lines
23 KiB
PHP
<?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\db;
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use yii\base\InvalidArgumentException;
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use yii\base\InvalidConfigException;
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/**
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* ActiveRelationTrait implements the common methods and properties for active record relational queries.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @author Carsten Brandt <mail@cebe.cc>
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* @since 2.0
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*
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* @method ActiveRecordInterface one($db = null)
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* @method ActiveRecordInterface[] all($db = null)
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* @property ActiveRecord $modelClass
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*/
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trait ActiveRelationTrait
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{
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/**
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* @var bool whether this query represents a relation to more than one record.
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* This property is only used in relational context. If true, this relation will
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* populate all query results into AR instances using [[Query::all()|all()]].
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* If false, only the first row of the results will be retrieved using [[Query::one()|one()]].
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*/
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public $multiple;
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/**
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* @var ActiveRecord the primary model of a relational query.
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* This is used only in lazy loading with dynamic query options.
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*/
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public $primaryModel;
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/**
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* @var array the columns of the primary and foreign tables that establish a relation.
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* The array keys must be columns of the table for this relation, and the array values
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* must be the corresponding columns from the primary table.
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* Do not prefix or quote the column names as this will be done automatically by Yii.
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* This property is only used in relational context.
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*/
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public $link;
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/**
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* @var array|object the query associated with the junction table. Please call [[via()]]
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* to set this property instead of directly setting it.
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* This property is only used in relational context.
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* @see via()
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*/
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public $via;
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/**
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* @var string the name of the relation that is the inverse of this relation.
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* For example, an order has a customer, which means the inverse of the "customer" relation
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* is the "orders", and the inverse of the "orders" relation is the "customer".
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* If this property is set, the primary record(s) will be referenced through the specified relation.
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* For example, `$customer->orders[0]->customer` and `$customer` will be the same object,
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* and accessing the customer of an order will not trigger new DB query.
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* This property is only used in relational context.
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* @see inverseOf()
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*/
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public $inverseOf;
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private $viaMap;
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/**
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* Clones internal objects.
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*/
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public function __clone()
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{
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parent::__clone();
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// make a clone of "via" object so that the same query object can be reused multiple times
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if (is_object($this->via)) {
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$this->via = clone $this->via;
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} elseif (is_array($this->via)) {
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$this->via = [$this->via[0], clone $this->via[1], $this->via[2]];
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}
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}
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/**
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* Specifies the relation associated with the junction table.
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*
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* Use this method to specify a pivot record/table when declaring a relation in the [[ActiveRecord]] class:
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*
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* ```php
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* class Order extends ActiveRecord
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* {
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* public function getOrderItems() {
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* return $this->hasMany(OrderItem::className(), ['order_id' => 'id']);
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* }
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*
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* public function getItems() {
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* return $this->hasMany(Item::className(), ['id' => 'item_id'])
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* ->via('orderItems');
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* }
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* }
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* ```
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*
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* @param string $relationName the relation name. This refers to a relation declared in [[primaryModel]].
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* @param callable $callable a PHP callback for customizing the relation associated with the junction table.
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* Its signature should be `function($query)`, where `$query` is the query to be customized.
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* @return $this the relation object itself.
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*/
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public function via($relationName, callable $callable = null)
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{
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$relation = $this->primaryModel->getRelation($relationName);
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$callableUsed = $callable !== null;
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$this->via = [$relationName, $relation, $callableUsed];
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if ($callable !== null) {
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call_user_func($callable, $relation);
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}
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return $this;
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}
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/**
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* Sets the name of the relation that is the inverse of this relation.
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* For example, a customer has orders, which means the inverse of the "orders" relation is the "customer".
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* If this property is set, the primary record(s) will be referenced through the specified relation.
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* For example, `$customer->orders[0]->customer` and `$customer` will be the same object,
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* and accessing the customer of an order will not trigger a new DB query.
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*
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* Use this method when declaring a relation in the [[ActiveRecord]] class, e.g. in Customer model:
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*
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* ```php
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* public function getOrders()
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* {
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* return $this->hasMany(Order::className(), ['customer_id' => 'id'])->inverseOf('customer');
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* }
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* ```
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*
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* This also may be used for Order model, but with caution:
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*
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* ```php
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* public function getCustomer()
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* {
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* return $this->hasOne(Customer::className(), ['id' => 'customer_id'])->inverseOf('orders');
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* }
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* ```
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*
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* in this case result will depend on how order(s) was loaded.
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* Let's suppose customer has several orders. If only one order was loaded:
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*
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* ```php
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* $orders = Order::find()->where(['id' => 1])->all();
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* $customerOrders = $orders[0]->customer->orders;
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* ```
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*
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* variable `$customerOrders` will contain only one order. If orders was loaded like this:
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*
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* ```php
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* $orders = Order::find()->with('customer')->where(['customer_id' => 1])->all();
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* $customerOrders = $orders[0]->customer->orders;
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* ```
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*
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* variable `$customerOrders` will contain all orders of the customer.
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*
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* @param string $relationName the name of the relation that is the inverse of this relation.
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* @return $this the relation object itself.
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*/
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public function inverseOf($relationName)
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{
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$this->inverseOf = $relationName;
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return $this;
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}
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/**
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* Finds the related records for the specified primary record.
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* This method is invoked when a relation of an ActiveRecord is being accessed in a lazy fashion.
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* @param string $name the relation name
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* @param ActiveRecordInterface|BaseActiveRecord $model the primary model
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* @return mixed the related record(s)
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* @throws InvalidArgumentException if the relation is invalid
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*/
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public function findFor($name, $model)
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{
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if (method_exists($model, 'get' . $name)) {
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$method = new \ReflectionMethod($model, 'get' . $name);
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$realName = lcfirst(substr($method->getName(), 3));
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if ($realName !== $name) {
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throw new InvalidArgumentException('Relation names are case sensitive. ' . get_class($model) . " has a relation named \"$realName\" instead of \"$name\".");
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}
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}
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return $this->multiple ? $this->all() : $this->one();
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}
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/**
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* If applicable, populate the query's primary model into the related records' inverse relationship.
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* @param array $result the array of related records as generated by [[populate()]]
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* @since 2.0.9
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*/
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private function addInverseRelations(&$result)
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{
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if ($this->inverseOf === null) {
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return;
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}
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foreach ($result as $i => $relatedModel) {
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if ($relatedModel instanceof ActiveRecordInterface) {
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if (!isset($inverseRelation)) {
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$inverseRelation = $relatedModel->getRelation($this->inverseOf);
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}
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$relatedModel->populateRelation($this->inverseOf, $inverseRelation->multiple ? [$this->primaryModel] : $this->primaryModel);
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} else {
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if (!isset($inverseRelation)) {
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/* @var $modelClass ActiveRecordInterface */
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$modelClass = $this->modelClass;
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$inverseRelation = $modelClass::instance()->getRelation($this->inverseOf);
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}
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$result[$i][$this->inverseOf] = $inverseRelation->multiple ? [$this->primaryModel] : $this->primaryModel;
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}
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}
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}
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/**
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* Finds the related records and populates them into the primary models.
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* @param string $name the relation name
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* @param array $primaryModels primary models
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* @return array the related models
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* @throws InvalidConfigException if [[link]] is invalid
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*/
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public function populateRelation($name, &$primaryModels)
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{
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if (!is_array($this->link)) {
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throw new InvalidConfigException('Invalid link: it must be an array of key-value pairs.');
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}
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if ($this->via instanceof self) {
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// via junction table
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/* @var $viaQuery ActiveRelationTrait */
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$viaQuery = $this->via;
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$viaModels = $viaQuery->findJunctionRows($primaryModels);
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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 $viaQuery ActiveRelationTrait|ActiveQueryTrait */
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list($viaName, $viaQuery) = $this->via;
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if ($viaQuery->asArray === null) {
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// inherit asArray from primary query
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$viaQuery->asArray($this->asArray);
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}
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$viaQuery->primaryModel = null;
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$viaModels = array_filter($viaQuery->populateRelation($viaName, $primaryModels));
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$this->filterByModels($viaModels);
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} else {
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$this->filterByModels($primaryModels);
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}
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if (!$this->multiple && count($primaryModels) === 1) {
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$model = $this->one();
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$primaryModel = reset($primaryModels);
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if ($primaryModel instanceof ActiveRecordInterface) {
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$primaryModel->populateRelation($name, $model);
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} else {
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$primaryModels[key($primaryModels)][$name] = $model;
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}
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if ($this->inverseOf !== null) {
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$this->populateInverseRelation($primaryModels, [$model], $name, $this->inverseOf);
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}
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return [$model];
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}
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// https://github.com/yiisoft/yii2/issues/3197
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// delay indexing related models after buckets are built
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$indexBy = $this->indexBy;
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$this->indexBy = null;
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$models = $this->all();
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if (isset($viaModels, $viaQuery)) {
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$buckets = $this->buildBuckets($models, $this->link, $viaModels, $viaQuery);
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} else {
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$buckets = $this->buildBuckets($models, $this->link);
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}
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$this->indexBy = $indexBy;
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if ($this->indexBy !== null && $this->multiple) {
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$buckets = $this->indexBuckets($buckets, $this->indexBy);
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}
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$link = array_values($this->link);
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if (isset($viaQuery)) {
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$deepViaQuery = $viaQuery;
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while ($deepViaQuery->via) {
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$deepViaQuery = is_array($deepViaQuery->via) ? $deepViaQuery->via[1] : $deepViaQuery->via;
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};
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$link = array_values($deepViaQuery->link);
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}
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foreach ($primaryModels as $i => $primaryModel) {
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if ($this->multiple && count($link) === 1 && is_array($keys = $primaryModel[reset($link)])) {
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$value = [];
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foreach ($keys as $key) {
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$key = $this->normalizeModelKey($key);
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if (isset($buckets[$key])) {
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if ($this->indexBy !== null) {
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// if indexBy is set, array_merge will cause renumbering of numeric array
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foreach ($buckets[$key] as $bucketKey => $bucketValue) {
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$value[$bucketKey] = $bucketValue;
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}
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} else {
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$value = array_merge($value, $buckets[$key]);
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}
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}
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}
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} else {
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$key = $this->getModelKey($primaryModel, $link);
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$value = isset($buckets[$key]) ? $buckets[$key] : ($this->multiple ? [] : null);
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}
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if ($primaryModel instanceof ActiveRecordInterface) {
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$primaryModel->populateRelation($name, $value);
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} else {
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$primaryModels[$i][$name] = $value;
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}
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}
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if ($this->inverseOf !== null) {
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$this->populateInverseRelation($primaryModels, $models, $name, $this->inverseOf);
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}
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return $models;
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}
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/**
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* @param ActiveRecordInterface[] $primaryModels primary models
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* @param ActiveRecordInterface[] $models models
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* @param string $primaryName the primary relation name
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* @param string $name the relation name
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*/
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private function populateInverseRelation(&$primaryModels, $models, $primaryName, $name)
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{
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if (empty($models) || empty($primaryModels)) {
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return;
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}
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$model = reset($models);
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/* @var $relation ActiveQueryInterface|ActiveQuery */
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if ($model instanceof ActiveRecordInterface) {
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$relation = $model->getRelation($name);
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} else {
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/* @var $modelClass ActiveRecordInterface */
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$modelClass = $this->modelClass;
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$relation = $modelClass::instance()->getRelation($name);
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}
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if ($relation->multiple) {
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$buckets = $this->buildBuckets($primaryModels, $relation->link, null, null, false);
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if ($model instanceof ActiveRecordInterface) {
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foreach ($models as $model) {
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$key = $this->getModelKey($model, $relation->link);
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$model->populateRelation($name, isset($buckets[$key]) ? $buckets[$key] : []);
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}
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} else {
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foreach ($primaryModels as $i => $primaryModel) {
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if ($this->multiple) {
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foreach ($primaryModel as $j => $m) {
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$key = $this->getModelKey($m, $relation->link);
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$primaryModels[$i][$j][$name] = isset($buckets[$key]) ? $buckets[$key] : [];
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}
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} elseif (!empty($primaryModel[$primaryName])) {
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$key = $this->getModelKey($primaryModel[$primaryName], $relation->link);
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$primaryModels[$i][$primaryName][$name] = isset($buckets[$key]) ? $buckets[$key] : [];
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}
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}
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}
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} elseif ($this->multiple) {
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foreach ($primaryModels as $i => $primaryModel) {
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foreach ($primaryModel[$primaryName] as $j => $m) {
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if ($m instanceof ActiveRecordInterface) {
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$m->populateRelation($name, $primaryModel);
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} else {
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$primaryModels[$i][$primaryName][$j][$name] = $primaryModel;
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}
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}
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}
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} else {
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foreach ($primaryModels as $i => $primaryModel) {
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if ($primaryModels[$i][$primaryName] instanceof ActiveRecordInterface) {
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$primaryModels[$i][$primaryName]->populateRelation($name, $primaryModel);
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} elseif (!empty($primaryModels[$i][$primaryName])) {
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$primaryModels[$i][$primaryName][$name] = $primaryModel;
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}
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}
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}
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}
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/**
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* @param array $models
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* @param array $link
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* @param array $viaModels
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* @param null|self $viaQuery
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* @param bool $checkMultiple
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* @return array
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*/
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private function buildBuckets($models, $link, $viaModels = null, $viaQuery = null, $checkMultiple = true)
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{
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if ($viaModels !== null) {
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$map = [];
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$viaLink = $viaQuery->link;
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$viaLinkKeys = array_keys($viaLink);
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$linkValues = array_values($link);
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foreach ($viaModels as $viaModel) {
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$key1 = $this->getModelKey($viaModel, $viaLinkKeys);
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$key2 = $this->getModelKey($viaModel, $linkValues);
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$map[$key2][$key1] = true;
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}
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$viaQuery->viaMap = $map;
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$viaVia = $viaQuery->via;
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while ($viaVia) {
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$viaViaQuery = is_array($viaVia) ? $viaVia[1] : $viaVia;
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$map = $this->mapVia($map, $viaViaQuery->viaMap);
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$viaVia = $viaViaQuery->via;
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};
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}
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$buckets = [];
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$linkKeys = array_keys($link);
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if (isset($map)) {
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foreach ($models as $model) {
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$key = $this->getModelKey($model, $linkKeys);
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if (isset($map[$key])) {
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foreach (array_keys($map[$key]) as $key2) {
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$buckets[$key2][] = $model;
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}
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}
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}
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} else {
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foreach ($models as $model) {
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$key = $this->getModelKey($model, $linkKeys);
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$buckets[$key][] = $model;
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}
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}
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if ($checkMultiple && !$this->multiple) {
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foreach ($buckets as $i => $bucket) {
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$buckets[$i] = reset($bucket);
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}
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}
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return $buckets;
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}
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/**
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* @param array $map
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* @param array $viaMap
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* @return array
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*/
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private function mapVia($map, $viaMap) {
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$resultMap = [];
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foreach ($map as $key => $linkKeys) {
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foreach (array_keys($linkKeys) as $linkKey) {
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$resultMap[$key] = $viaMap[$linkKey];
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}
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}
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return $resultMap;
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}
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/**
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* Indexes buckets by column name.
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*
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* @param array $buckets
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* @param string|callable $indexBy the name of the column by which the query results should be indexed by.
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* This can also be a callable (e.g. anonymous function) that returns the index value based on the given row data.
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* @return array
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*/
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private function indexBuckets($buckets, $indexBy)
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{
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$result = [];
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foreach ($buckets as $key => $models) {
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$result[$key] = [];
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foreach ($models as $model) {
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$index = is_string($indexBy) ? $model[$indexBy] : call_user_func($indexBy, $model);
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$result[$key][$index] = $model;
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}
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}
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return $result;
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}
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/**
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* @param array $attributes the attributes to prefix
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* @return array
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*/
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private function prefixKeyColumns($attributes)
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{
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if ($this instanceof ActiveQuery && (!empty($this->join) || !empty($this->joinWith))) {
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if (empty($this->from)) {
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/* @var $modelClass ActiveRecord */
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$modelClass = $this->modelClass;
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$alias = $modelClass::tableName();
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} else {
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foreach ($this->from as $alias => $table) {
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if (!is_string($alias)) {
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$alias = $table;
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}
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break;
|
|
}
|
|
}
|
|
if (isset($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) {
|
|
if (is_array($value)) {
|
|
$values = array_merge($values, $value);
|
|
} elseif ($value instanceof ArrayExpression && $value->getDimension() === 1) {
|
|
$values = array_merge($values, $value->getValue());
|
|
} else {
|
|
$values[] = $value;
|
|
}
|
|
}
|
|
}
|
|
if (empty($values)) {
|
|
$this->emulateExecution();
|
|
}
|
|
} else {
|
|
// composite keys
|
|
|
|
// ensure keys of $this->link are prefixed the same way as $attributes
|
|
$prefixedLink = array_combine($attributes, $this->link);
|
|
foreach ($models as $model) {
|
|
$v = [];
|
|
foreach ($prefixedLink as $attribute => $link) {
|
|
$v[$attribute] = $model[$link];
|
|
}
|
|
$values[] = $v;
|
|
if (empty($v)) {
|
|
$this->emulateExecution();
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!empty($values)) {
|
|
$scalarValues = [];
|
|
$nonScalarValues = [];
|
|
foreach ($values as $value) {
|
|
if (is_scalar($value)) {
|
|
$scalarValues[] = $value;
|
|
} else {
|
|
$nonScalarValues[] = $value;
|
|
}
|
|
}
|
|
|
|
$scalarValues = array_unique($scalarValues);
|
|
$values = array_merge($scalarValues, $nonScalarValues);
|
|
}
|
|
|
|
$this->andWhere(['in', $attributes, $values]);
|
|
}
|
|
|
|
/**
|
|
* @param ActiveRecordInterface|array $model
|
|
* @param array $attributes
|
|
* @return string
|
|
*/
|
|
private function getModelKey($model, $attributes)
|
|
{
|
|
$key = [];
|
|
foreach ($attributes as $attribute) {
|
|
$key[] = $this->normalizeModelKey($model[$attribute]);
|
|
}
|
|
if (count($key) > 1) {
|
|
return serialize($key);
|
|
}
|
|
return reset($key);
|
|
}
|
|
|
|
/**
|
|
* @param mixed $value raw key value. Since 2.0.40 non-string values must be convertable to string (like special
|
|
* objects for cross-DBMS relations, for example: `|MongoId`).
|
|
* @return string normalized key value.
|
|
*/
|
|
private function normalizeModelKey($value)
|
|
{
|
|
try {
|
|
return (string)$value;
|
|
} catch (\Exception $e) {
|
|
throw new InvalidConfigException('Value must be convertable to string.');
|
|
} catch (\Throwable $e) {
|
|
throw new InvalidConfigException('Value must be convertable to string.');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param array $primaryModels either array of AR instances or arrays
|
|
* @return array
|
|
*/
|
|
private function findJunctionRows($primaryModels)
|
|
{
|
|
if (empty($primaryModels)) {
|
|
return [];
|
|
}
|
|
$this->filterByModels($primaryModels);
|
|
/* @var $primaryModel ActiveRecord */
|
|
$primaryModel = reset($primaryModels);
|
|
if (!$primaryModel instanceof ActiveRecordInterface) {
|
|
// when primaryModels are array of arrays (asArray case)
|
|
$primaryModel = $this->modelClass;
|
|
}
|
|
|
|
return $this->asArray()->all($primaryModel::getDb());
|
|
}
|
|
}
|