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d0c6cb7700
in this cases it does not make sense to remove duplicates as the result is not on record level anymore. This could be the case after GROUP BY has been applied. fixes #8772
730 lines
26 KiB
PHP
730 lines
26 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\InvalidConfigException;
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/**
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* ActiveQuery represents a DB 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()]] and [[ActiveRecord::findBySql()]].
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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 mainly provides the following methods to retrieve the query results:
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*
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* - [[one()]]: returns a single record populated with the first row of data.
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* - [[all()]]: returns all records based on the query results.
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* - [[count()]]: returns the number of records.
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* - [[sum()]]: returns the sum over the specified column.
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* - [[average()]]: returns the average over the specified column.
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* - [[min()]]: returns the min over the specified column.
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* - [[max()]]: returns the max over the specified column.
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* - [[scalar()]]: returns the value of the first column in the first row of the query result.
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* - [[column()]]: returns the value of the first column in the query result.
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* - [[exists()]]: returns a value indicating whether the query result has data or not.
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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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* - [[indexBy()]]: the name of the column by which the query result should be indexed.
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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 junction table, it may be specified by [[via()]] or [[viaTable()]] method.
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* These 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 and [[onCondition()]] which adds a condition that
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* is to be added to relational query join condition.
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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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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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* @event Event an event that is triggered when the query is initialized via [[init()]].
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*/
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const EVENT_INIT = 'init';
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/**
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* @var string the SQL statement to be executed for retrieving AR records.
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* This is set by [[ActiveRecord::findBySql()]].
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*/
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public $sql;
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/**
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* @var string|array the join condition to be used when this query is used in a relational context.
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* The condition will be used in the ON part when [[ActiveQuery::joinWith()]] is called.
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* Otherwise, the condition will be used in the WHERE part of a query.
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* Please refer to [[Query::where()]] on how to specify this parameter.
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* @see onCondition()
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*/
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public $on;
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/**
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* @var array a list of relations that this query should be joined with
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*/
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public $joinWith;
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/**
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* Constructor.
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* @param string $modelClass the model class associated with this query
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* @param array $config configurations to be applied to the newly created query object
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*/
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public function __construct($modelClass, $config = [])
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{
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$this->modelClass = $modelClass;
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parent::__construct($config);
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}
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/**
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* Initializes the object.
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* This method is called at the end of the constructor. The default implementation will trigger
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* an [[EVENT_INIT]] event. If you override this method, make sure you call the parent implementation at the end
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* to ensure triggering of the event.
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*/
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public function init()
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{
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parent::init();
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$this->trigger(self::EVENT_INIT);
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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 $db the DB connection used to create the DB command.
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* If null, the DB connection returned by [[modelClass]] will be used.
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* @return array|ActiveRecord[] the query results. If the query results in nothing, an empty array will be returned.
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*/
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public function all($db = null)
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{
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return parent::all($db);
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}
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/**
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* @inheritdoc
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*/
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public function prepare($builder)
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{
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// NOTE: because the same ActiveQuery may be used to build different SQL statements
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// (e.g. by ActiveDataProvider, one for count query, the other for row data query,
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// it is important to make sure the same ActiveQuery can be used to build SQL statements
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// multiple times.
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if (!empty($this->joinWith)) {
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$this->buildJoinWith();
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$this->joinWith = null; // clean it up to avoid issue https://github.com/yiisoft/yii2/issues/2687
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}
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if (empty($this->from)) {
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/* @var $modelClass ActiveRecord */
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$modelClass = $this->modelClass;
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$tableName = $modelClass::tableName();
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$this->from = [$tableName];
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}
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if (empty($this->select) && !empty($this->join)) {
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foreach ((array) $this->from as $alias => $table) {
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if (is_string($alias)) {
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$this->select = ["$alias.*"];
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} elseif (is_string($table)) {
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if (preg_match('/^(.*?)\s+({{\w+}}|\w+)$/', $table, $matches)) {
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$alias = $matches[2];
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} else {
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$alias = $table;
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}
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$this->select = ["$alias.*"];
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}
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break;
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}
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}
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if ($this->primaryModel === null) {
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// eager loading
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$query = Query::create($this);
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} else {
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// lazy loading of a relation
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$where = $this->where;
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if ($this->via instanceof self) {
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// via junction table
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$viaModels = $this->via->findJunctionRows([$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 $viaQuery ActiveQuery */
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list($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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$query = Query::create($this);
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$this->where = $where;
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}
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if (!empty($this->on)) {
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$query->andWhere($this->on);
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}
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return $query;
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}
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/**
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* @inheritdoc
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*/
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public function populate($rows)
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{
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if (empty($rows)) {
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return [];
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}
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$models = $this->createModels($rows);
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if (!empty($this->join) && $this->indexBy === null) {
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$models = $this->removeDuplicatedModels($models);
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}
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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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}
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/**
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* Removes duplicated models by checking their primary key values.
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* This method is mainly called when a join query is performed, which may cause duplicated rows being returned.
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* @param array $models the models to be checked
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* @throws InvalidConfigException if model primary key is empty
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* @return array the distinctive models
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*/
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private function removeDuplicatedModels($models)
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{
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$hash = [];
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/* @var $class ActiveRecord */
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$class = $this->modelClass;
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$pks = $class::primaryKey();
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if (count($pks) > 1) {
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// composite primary key
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foreach ($models as $i => $model) {
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$key = [];
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foreach ($pks as $pk) {
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if (!isset($model[$pk])) {
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// do not continue if the primary key is not part of the result set
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break 2;
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}
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$key[] = $model[$pk];
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}
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$key = serialize($key);
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if (isset($hash[$key])) {
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unset($models[$i]);
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} else {
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$hash[$key] = true;
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}
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}
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} elseif (empty($pks)) {
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throw new InvalidConfigException("Primary key of '{$class}' can not be empty.");
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} else {
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// single column primary key
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$pk = reset($pks);
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foreach ($models as $i => $model) {
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if (!isset($model[$pk])) {
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// do not continue if the primary key is not part of the result set
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break;
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}
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$key = $model[$pk];
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if (isset($hash[$key])) {
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unset($models[$i]);
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} elseif ($key !== null) {
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$hash[$key] = true;
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}
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}
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}
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return array_values($models);
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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 $db the DB connection used to create the DB command.
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* If null, the DB connection returned by [[modelClass]] will be used.
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* @return ActiveRecord|array|null a single row of query result. Depending on the setting of [[asArray]],
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* the query result may be either an array or an ActiveRecord object. Null will be returned
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* if the query results in nothing.
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*/
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public function one($db = null)
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{
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$row = parent::one($db);
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if ($row !== false) {
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$models = $this->populate([$row]);
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return reset($models) ?: null;
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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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* Creates a DB command that can be used to execute this query.
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* @param Connection $db the DB connection used to create the DB command.
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* If null, the DB connection returned by [[modelClass]] will be used.
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* @return Command the created DB command instance.
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*/
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public function createCommand($db = null)
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{
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/* @var $modelClass ActiveRecord */
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$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->sql === null) {
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list ($sql, $params) = $db->getQueryBuilder()->build($this);
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} else {
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$sql = $this->sql;
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$params = $this->params;
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}
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return $db->createCommand($sql, $params);
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}
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/**
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* @inheritdoc
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*/
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protected function queryScalar($selectExpression, $db)
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{
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if ($this->sql === null) {
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return parent::queryScalar($selectExpression, $db);
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}
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/* @var $modelClass ActiveRecord */
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$modelClass = $this->modelClass;
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if ($db === null) {
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$db = $modelClass::getDb();
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}
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return (new Query)->select([$selectExpression])
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->from(['c' => "({$this->sql})"])
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->params($this->params)
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->createCommand($db)
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->queryScalar();
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}
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/**
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* Joins with the specified relations.
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*
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* This method allows you to reuse existing relation definitions to perform JOIN queries.
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* Based on the definition of the specified relation(s), the method will append one or multiple
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* JOIN statements to the current query.
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*
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* If the `$eagerLoading` parameter is true, the method will also eager loading the specified relations,
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* which is equivalent to calling [[with()]] using the specified relations.
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*
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* Note that because a JOIN query will be performed, you are responsible to disambiguate column names.
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*
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* This method differs from [[with()]] in that it will build up and execute a JOIN SQL statement
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* for the primary table. And when `$eagerLoading` is true, it will call [[with()]] in addition with the specified relations.
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*
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* @param string|array $with the relations to be joined. Each array element represents a single relation.
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* The array keys are relation names, and the array values are the corresponding anonymous functions that
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* can be used to modify the relation queries on-the-fly. If a relation query does not need modification,
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* you may use the relation name as the array value. Sub-relations can also be specified (see [[with()]]).
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* For example,
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*
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* ```php
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* // find all orders that contain books, and eager loading "books"
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* Order::find()->joinWith('books', true, 'INNER JOIN')->all();
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* // find all orders, eager loading "books", and sort the orders and books by the book names.
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* Order::find()->joinWith([
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* 'books' => function ($query) {
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* $query->orderBy('item.name');
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* }
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* ])->all();
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* ```
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*
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* @param boolean|array $eagerLoading whether to eager load the relations specified in `$with`.
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* When this is a boolean, it applies to all relations specified in `$with`. Use an array
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* to explicitly list which relations in `$with` need to be eagerly loaded.
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* @param string|array $joinType the join type of the relations specified in `$with`.
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* When this is a string, it applies to all relations specified in `$with`. Use an array
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* in the format of `relationName => joinType` to specify different join types for different relations.
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* @return $this the query object itself
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*/
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public function joinWith($with, $eagerLoading = true, $joinType = 'LEFT JOIN')
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{
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$this->joinWith[] = [(array) $with, $eagerLoading, $joinType];
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return $this;
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}
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private function buildJoinWith()
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{
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$join = $this->join;
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$this->join = [];
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foreach ($this->joinWith as $config) {
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list ($with, $eagerLoading, $joinType) = $config;
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$this->joinWithRelations(new $this->modelClass, $with, $joinType);
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if (is_array($eagerLoading)) {
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foreach ($with as $name => $callback) {
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if (is_integer($name)) {
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if (!in_array($callback, $eagerLoading, true)) {
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unset($with[$name]);
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}
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} elseif (!in_array($name, $eagerLoading, true)) {
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unset($with[$name]);
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}
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}
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} elseif (!$eagerLoading) {
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$with = [];
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}
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$this->with($with);
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}
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// remove duplicated joins added by joinWithRelations that may be added
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// e.g. when joining a relation and a via relation at the same time
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$uniqueJoins = [];
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foreach ($this->join as $j) {
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$uniqueJoins[serialize($j)] = $j;
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}
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$this->join = array_values($uniqueJoins);
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if (!empty($join)) {
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// append explicit join to joinWith()
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// https://github.com/yiisoft/yii2/issues/2880
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$this->join = empty($this->join) ? $join : array_merge($this->join, $join);
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}
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}
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/**
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* Inner joins with the specified relations.
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* This is a shortcut method to [[joinWith()]] with the join type set as "INNER JOIN".
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* Please refer to [[joinWith()]] for detailed usage of this method.
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* @param string|array $with the relations to be joined with
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* @param boolean|array $eagerLoading whether to eager loading the relations
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* @return $this the query object itself
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* @see joinWith()
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*/
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public function innerJoinWith($with, $eagerLoading = true)
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{
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return $this->joinWith($with, $eagerLoading, 'INNER JOIN');
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}
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/**
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* Modifies the current query by adding join fragments based on the given relations.
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* @param ActiveRecord $model the primary model
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* @param array $with the relations to be joined
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* @param string|array $joinType the join type
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*/
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private function joinWithRelations($model, $with, $joinType)
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{
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$relations = [];
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foreach ($with as $name => $callback) {
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if (is_integer($name)) {
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$name = $callback;
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$callback = null;
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}
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$primaryModel = $model;
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$parent = $this;
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$prefix = '';
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while (($pos = strpos($name, '.')) !== false) {
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$childName = substr($name, $pos + 1);
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$name = substr($name, 0, $pos);
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$fullName = $prefix === '' ? $name : "$prefix.$name";
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if (!isset($relations[$fullName])) {
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$relations[$fullName] = $relation = $primaryModel->getRelation($name);
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$this->joinWithRelation($parent, $relation, $this->getJoinType($joinType, $fullName));
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} else {
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$relation = $relations[$fullName];
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}
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$primaryModel = new $relation->modelClass;
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$parent = $relation;
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$prefix = $fullName;
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$name = $childName;
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}
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$fullName = $prefix === '' ? $name : "$prefix.$name";
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if (!isset($relations[$fullName])) {
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$relations[$fullName] = $relation = $primaryModel->getRelation($name);
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if ($callback !== null) {
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call_user_func($callback, $relation);
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}
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if (!empty($relation->joinWith)) {
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$relation->buildJoinWith();
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}
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$this->joinWithRelation($parent, $relation, $this->getJoinType($joinType, $fullName));
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}
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}
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}
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/**
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* Returns the join type based on the given join type parameter and the relation name.
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* @param string|array $joinType the given join type(s)
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* @param string $name relation name
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* @return string the real join type
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*/
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private function getJoinType($joinType, $name)
|
|
{
|
|
if (is_array($joinType) && isset($joinType[$name])) {
|
|
return $joinType[$name];
|
|
} else {
|
|
return is_string($joinType) ? $joinType : 'INNER JOIN';
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the table name and the table alias for [[modelClass]].
|
|
* @param ActiveQuery $query
|
|
* @return array the table name and the table alias.
|
|
*/
|
|
private function getQueryTableName($query)
|
|
{
|
|
if (empty($query->from)) {
|
|
/* @var $modelClass ActiveRecord */
|
|
$modelClass = $query->modelClass;
|
|
$tableName = $modelClass::tableName();
|
|
} else {
|
|
$tableName = '';
|
|
foreach ($query->from as $alias => $tableName) {
|
|
if (is_string($alias)) {
|
|
return [$tableName, $alias];
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (preg_match('/^(.*?)\s+({{\w+}}|\w+)$/', $tableName, $matches)) {
|
|
$alias = $matches[2];
|
|
} else {
|
|
$alias = $tableName;
|
|
}
|
|
|
|
return [$tableName, $alias];
|
|
}
|
|
|
|
/**
|
|
* Joins a parent query with a child query.
|
|
* The current query object will be modified accordingly.
|
|
* @param ActiveQuery $parent
|
|
* @param ActiveQuery $child
|
|
* @param string $joinType
|
|
*/
|
|
private function joinWithRelation($parent, $child, $joinType)
|
|
{
|
|
$via = $child->via;
|
|
$child->via = null;
|
|
if ($via instanceof ActiveQuery) {
|
|
// via table
|
|
$this->joinWithRelation($parent, $via, $joinType);
|
|
$this->joinWithRelation($via, $child, $joinType);
|
|
return;
|
|
} elseif (is_array($via)) {
|
|
// via relation
|
|
$this->joinWithRelation($parent, $via[1], $joinType);
|
|
$this->joinWithRelation($via[1], $child, $joinType);
|
|
return;
|
|
}
|
|
|
|
list ($parentTable, $parentAlias) = $this->getQueryTableName($parent);
|
|
list ($childTable, $childAlias) = $this->getQueryTableName($child);
|
|
|
|
if (!empty($child->link)) {
|
|
|
|
if (strpos($parentAlias, '{{') === false) {
|
|
$parentAlias = '{{' . $parentAlias . '}}';
|
|
}
|
|
if (strpos($childAlias, '{{') === false) {
|
|
$childAlias = '{{' . $childAlias . '}}';
|
|
}
|
|
|
|
$on = [];
|
|
foreach ($child->link as $childColumn => $parentColumn) {
|
|
$on[] = "$parentAlias.[[$parentColumn]] = $childAlias.[[$childColumn]]";
|
|
}
|
|
$on = implode(' AND ', $on);
|
|
if (!empty($child->on)) {
|
|
$on = ['and', $on, $child->on];
|
|
}
|
|
} else {
|
|
$on = $child->on;
|
|
}
|
|
$this->join($joinType, empty($child->from) ? $childTable : $child->from, $on);
|
|
|
|
if (!empty($child->where)) {
|
|
$this->andWhere($child->where);
|
|
}
|
|
if (!empty($child->having)) {
|
|
$this->andHaving($child->having);
|
|
}
|
|
if (!empty($child->orderBy)) {
|
|
$this->addOrderBy($child->orderBy);
|
|
}
|
|
if (!empty($child->groupBy)) {
|
|
$this->addGroupBy($child->groupBy);
|
|
}
|
|
if (!empty($child->params)) {
|
|
$this->addParams($child->params);
|
|
}
|
|
if (!empty($child->join)) {
|
|
foreach ($child->join as $join) {
|
|
$this->join[] = $join;
|
|
}
|
|
}
|
|
if (!empty($child->union)) {
|
|
foreach ($child->union as $union) {
|
|
$this->union[] = $union;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the ON condition for a relational query.
|
|
* The condition will be used in the ON part when [[ActiveQuery::joinWith()]] is called.
|
|
* Otherwise, the condition will be used in the WHERE part of a query.
|
|
*
|
|
* Use this method to specify additional conditions when declaring a relation in the [[ActiveRecord]] class:
|
|
*
|
|
* ```php
|
|
* public function getActiveUsers()
|
|
* {
|
|
* return $this->hasMany(User::className(), ['id' => 'user_id'])->onCondition(['active' => true]);
|
|
* }
|
|
* ```
|
|
*
|
|
* @param string|array $condition the ON condition. Please refer to [[Query::where()]] on how to specify this parameter.
|
|
* @param array $params the parameters (name => value) to be bound to the query.
|
|
* @return $this the query object itself
|
|
*/
|
|
public function onCondition($condition, $params = [])
|
|
{
|
|
$this->on = $condition;
|
|
$this->addParams($params);
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Adds an additional ON condition to the existing one.
|
|
* The new condition and the existing one will be joined using the 'AND' operator.
|
|
* @param string|array $condition the new ON condition. Please refer to [[where()]]
|
|
* on how to specify this parameter.
|
|
* @param array $params the parameters (name => value) to be bound to the query.
|
|
* @return $this the query object itself
|
|
* @see onCondition()
|
|
* @see orOnCondition()
|
|
*/
|
|
public function andOnCondition($condition, $params = [])
|
|
{
|
|
if ($this->on === null) {
|
|
$this->on = $condition;
|
|
} else {
|
|
$this->on = ['and', $this->on, $condition];
|
|
}
|
|
$this->addParams($params);
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Adds an additional ON condition to the existing one.
|
|
* The new condition and the existing one will be joined using the 'OR' operator.
|
|
* @param string|array $condition the new ON condition. Please refer to [[where()]]
|
|
* on how to specify this parameter.
|
|
* @param array $params the parameters (name => value) to be bound to the query.
|
|
* @return $this the query object itself
|
|
* @see onCondition()
|
|
* @see andOnCondition()
|
|
*/
|
|
public function orOnCondition($condition, $params = [])
|
|
{
|
|
if ($this->on === null) {
|
|
$this->on = $condition;
|
|
} else {
|
|
$this->on = ['or', $this->on, $condition];
|
|
}
|
|
$this->addParams($params);
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Specifies the junction table for a relational query.
|
|
*
|
|
* Use this method to specify a junction table when declaring a relation in the [[ActiveRecord]] class:
|
|
*
|
|
* ```php
|
|
* public function getItems()
|
|
* {
|
|
* return $this->hasMany(Item::className(), ['id' => 'item_id'])
|
|
* ->viaTable('order_item', ['order_id' => 'id']);
|
|
* }
|
|
* ```
|
|
*
|
|
* @param string $tableName the name of the junction table.
|
|
* @param array $link the link between the junction table and the table associated with [[primaryModel]].
|
|
* The keys of the array represent the columns in the junction table, and the values represent the columns
|
|
* in the [[primaryModel]] table.
|
|
* @param callable $callable a PHP callback for customizing the relation associated with the junction table.
|
|
* Its signature should be `function($query)`, where `$query` is the query to be customized.
|
|
* @return $this the query object itself
|
|
* @see via()
|
|
*/
|
|
public function viaTable($tableName, $link, callable $callable = null)
|
|
{
|
|
$relation = new ActiveQuery(get_class($this->primaryModel), [
|
|
'from' => [$tableName],
|
|
'link' => $link,
|
|
'multiple' => true,
|
|
'asArray' => true,
|
|
]);
|
|
$this->via = $relation;
|
|
if ($callable !== null) {
|
|
call_user_func($callable, $relation);
|
|
}
|
|
|
|
return $this;
|
|
}
|
|
}
|