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1 | <?php |
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2 | /** |
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3 | * @link http://www.yiiframework.com/ |
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4 | * @copyright Copyright (c) 2008 Yii Software LLC |
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5 | * @license http://www.yiiframework.com/license/ |
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6 | */ |
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7 | |||
8 | namespace yii\db; |
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9 | |||
10 | use yii\base\InvalidConfigException; |
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11 | use yii\base\InvalidParamException; |
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12 | |||
13 | /** |
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14 | * ActiveRelationTrait implements the common methods and properties for active record relational queries. |
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15 | * |
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16 | * @author Qiang Xue <[email protected]> |
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17 | * @author Carsten Brandt <[email protected]> |
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18 | * @since 2.0 |
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19 | * |
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20 | * @method ActiveRecordInterface one() |
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21 | * @method ActiveRecordInterface[] all() |
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22 | * @property ActiveRecord $modelClass |
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23 | */ |
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24 | trait ActiveRelationTrait |
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25 | { |
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26 | /** |
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27 | * @var bool whether this query represents a relation to more than one record. |
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28 | * This property is only used in relational context. If true, this relation will |
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29 | * populate all query results into AR instances using [[Query::all()|all()]]. |
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30 | * If false, only the first row of the results will be retrieved using [[Query::one()|one()]]. |
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31 | */ |
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32 | public $multiple; |
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33 | /** |
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34 | * @var ActiveRecord the primary model of a relational query. |
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35 | * This is used only in lazy loading with dynamic query options. |
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36 | */ |
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37 | public $primaryModel; |
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38 | /** |
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39 | * @var array the columns of the primary and foreign tables that establish a relation. |
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40 | * The array keys must be columns of the table for this relation, and the array values |
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41 | * must be the corresponding columns from the primary table. |
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42 | * Do not prefix or quote the column names as this will be done automatically by Yii. |
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43 | * This property is only used in relational context. |
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44 | */ |
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45 | public $link; |
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46 | /** |
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47 | * @var array|object the query associated with the junction table. Please call [[via()]] |
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48 | * to set this property instead of directly setting it. |
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49 | * This property is only used in relational context. |
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50 | * @see via() |
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51 | */ |
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52 | public $via; |
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53 | /** |
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54 | * @var string the name of the relation that is the inverse of this relation. |
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55 | * For example, an order has a customer, which means the inverse of the "customer" relation |
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56 | * is the "orders", and the inverse of the "orders" relation is the "customer". |
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57 | * If this property is set, the primary record(s) will be referenced through the specified relation. |
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58 | * For example, `$customer->orders[0]->customer` and `$customer` will be the same object, |
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59 | * and accessing the customer of an order will not trigger new DB query. |
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60 | * This property is only used in relational context. |
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61 | * @see inverseOf() |
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62 | */ |
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63 | public $inverseOf; |
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64 | |||
65 | |||
66 | /** |
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67 | * Clones internal objects. |
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68 | */ |
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69 | 12 | public function __clone() |
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70 | { |
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71 | 12 | parent::__clone(); |
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72 | // make a clone of "via" object so that the same query object can be reused multiple times |
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73 | 12 | if (is_object($this->via)) { |
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74 | $this->via = clone $this->via; |
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75 | 12 | } elseif (is_array($this->via)) { |
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76 | 6 | $this->via = [$this->via[0], clone $this->via[1]]; |
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77 | } |
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78 | 12 | } |
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79 | |||
80 | /** |
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81 | * Specifies the relation associated with the junction table. |
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82 | * |
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83 | * Use this method to specify a pivot record/table when declaring a relation in the [[ActiveRecord]] class: |
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84 | * |
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85 | * ```php |
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86 | * class Order extends ActiveRecord |
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87 | * { |
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88 | * public function getOrderItems() { |
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89 | * return $this->hasMany(OrderItem::className(), ['order_id' => 'id']); |
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90 | * } |
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91 | * |
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92 | * public function getItems() { |
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93 | * return $this->hasMany(Item::className(), ['id' => 'item_id']) |
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94 | * ->via('orderItems'); |
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95 | * } |
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96 | * } |
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97 | * ``` |
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98 | * |
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99 | * @param string $relationName the relation name. This refers to a relation declared in [[primaryModel]]. |
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100 | * @param callable $callable a PHP callback for customizing the relation associated with the junction table. |
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101 | * Its signature should be `function($query)`, where `$query` is the query to be customized. |
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102 | * @return $this the relation object itself. |
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103 | */ |
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104 | 66 | public function via($relationName, callable $callable = null) |
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105 | { |
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106 | 66 | $relation = $this->primaryModel->getRelation($relationName); |
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107 | 66 | $this->via = [$relationName, $relation]; |
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108 | 66 | if ($callable !== null) { |
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109 | 45 | call_user_func($callable, $relation); |
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110 | } |
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111 | |||
112 | 66 | return $this; |
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113 | } |
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114 | |||
115 | /** |
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116 | * Sets the name of the relation that is the inverse of this relation. |
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117 | * For example, an order has a customer, which means the inverse of the "customer" relation |
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118 | * is the "orders", and the inverse of the "orders" relation is the "customer". |
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119 | * If this property is set, the primary record(s) will be referenced through the specified relation. |
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120 | * For example, `$customer->orders[0]->customer` and `$customer` will be the same object, |
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121 | * and accessing the customer of an order will not trigger a new DB query. |
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122 | * |
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123 | * Use this method when declaring a relation in the [[ActiveRecord]] class: |
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124 | * |
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125 | * ```php |
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126 | * public function getOrders() |
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127 | * { |
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128 | * return $this->hasMany(Order::className(), ['customer_id' => 'id'])->inverseOf('customer'); |
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129 | * } |
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130 | * ``` |
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131 | * |
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132 | * @param string $relationName the name of the relation that is the inverse of this relation. |
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133 | * @return $this the relation object itself. |
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134 | */ |
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135 | 6 | public function inverseOf($relationName) |
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136 | { |
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137 | 6 | $this->inverseOf = $relationName; |
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138 | 6 | return $this; |
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139 | } |
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140 | |||
141 | /** |
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142 | * Finds the related records for the specified primary record. |
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143 | * This method is invoked when a relation of an ActiveRecord is being accessed in a lazy fashion. |
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144 | * @param string $name the relation name |
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145 | * @param ActiveRecordInterface|BaseActiveRecord $model the primary model |
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146 | * @return mixed the related record(s) |
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147 | * @throws InvalidParamException if the relation is invalid |
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148 | */ |
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149 | 52 | public function findFor($name, $model) |
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150 | { |
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151 | 52 | if (method_exists($model, 'get' . $name)) { |
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152 | 52 | $method = new \ReflectionMethod($model, 'get' . $name); |
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153 | 52 | $realName = lcfirst(substr($method->getName(), 3)); |
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154 | 52 | if ($realName !== $name) { |
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155 | throw new InvalidParamException('Relation names are case sensitive. ' . get_class($model) . " has a relation named \"$realName\" instead of \"$name\"."); |
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156 | } |
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157 | } |
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158 | |||
159 | 52 | return $this->multiple ? $this->all() : $this->one(); |
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160 | } |
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161 | |||
162 | /** |
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163 | * If applicable, populate the query's primary model into the related records' inverse relationship. |
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164 | * @param array $result the array of related records as generated by [[populate()]] |
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165 | * @since 2.0.9 |
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166 | */ |
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167 | 6 | private function addInverseRelations(&$result) |
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168 | { |
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169 | 6 | if ($this->inverseOf === null) { |
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170 | return; |
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171 | } |
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172 | |||
173 | 6 | foreach ($result as $i => $relatedModel) { |
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174 | 6 | if ($relatedModel instanceof ActiveRecordInterface) { |
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175 | 6 | if (!isset($inverseRelation)) { |
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176 | 6 | $inverseRelation = $relatedModel->getRelation($this->inverseOf); |
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177 | } |
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178 | 6 | $relatedModel->populateRelation($this->inverseOf, $inverseRelation->multiple ? [$this->primaryModel] : $this->primaryModel); |
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179 | } else { |
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180 | 6 | if (!isset($inverseRelation)) { |
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181 | 6 | $inverseRelation = (new $this->modelClass())->getRelation($this->inverseOf); |
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182 | } |
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183 | 6 | $result[$i][$this->inverseOf] = $inverseRelation->multiple ? [$this->primaryModel] : $this->primaryModel; |
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184 | } |
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185 | } |
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186 | 6 | } |
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187 | |||
188 | /** |
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189 | * Finds the related records and populates them into the primary models. |
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190 | * @param string $name the relation name |
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191 | * @param array $primaryModels primary models |
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192 | * @return array the related models |
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193 | * @throws InvalidConfigException if [[link]] is invalid |
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194 | */ |
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195 | 72 | public function populateRelation($name, &$primaryModels) |
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196 | { |
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197 | 72 | if (!is_array($this->link)) { |
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198 | throw new InvalidConfigException('Invalid link: it must be an array of key-value pairs.'); |
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199 | } |
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200 | |||
201 | 72 | if ($this->via instanceof self) { |
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202 | // via junction table |
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203 | /* @var $viaQuery ActiveRelationTrait */ |
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204 | 9 | $viaQuery = $this->via; |
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205 | 9 | $viaModels = $viaQuery->findJunctionRows($primaryModels); |
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206 | 9 | $this->filterByModels($viaModels); |
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207 | 72 | } elseif (is_array($this->via)) { |
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208 | // via relation |
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209 | /* @var $viaQuery ActiveRelationTrait|ActiveQueryTrait */ |
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210 | 36 | list($viaName, $viaQuery) = $this->via; |
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211 | 36 | if ($viaQuery->asArray === null) { |
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212 | // inherit asArray from primary query |
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213 | 36 | $viaQuery->asArray($this->asArray); |
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214 | } |
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215 | 36 | $viaQuery->primaryModel = null; |
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216 | 36 | $viaModels = $viaQuery->populateRelation($viaName, $primaryModels); |
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217 | 36 | $this->filterByModels($viaModels); |
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218 | } else { |
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219 | 72 | $this->filterByModels($primaryModels); |
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220 | } |
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221 | |||
222 | 72 | if (!$this->multiple && count($primaryModels) === 1) { |
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223 | 21 | $model = $this->one(); |
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224 | 21 | $primaryModel = reset($primaryModels); |
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225 | 21 | if ($primaryModel instanceof ActiveRecordInterface) { |
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226 | 21 | $primaryModel->populateRelation($name, $model); |
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227 | } else { |
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228 | 3 | $primaryModels[key($primaryModels)][$name] = $model; |
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229 | } |
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230 | 21 | if ($this->inverseOf !== null) { |
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231 | 6 | $this->populateInverseRelation($primaryModels, [$model], $name, $this->inverseOf); |
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232 | } |
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233 | |||
234 | 21 | return [$model]; |
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235 | } |
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236 | |||
237 | // https://github.com/yiisoft/yii2/issues/3197 |
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238 | // delay indexing related models after buckets are built |
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239 | 60 | $indexBy = $this->indexBy; |
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240 | 60 | $this->indexBy = null; |
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241 | 60 | $models = $this->all(); |
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242 | |||
243 | 60 | if (isset($viaModels, $viaQuery)) { |
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244 | 36 | $buckets = $this->buildBuckets($models, $this->link, $viaModels, $viaQuery->link); |
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245 | } else { |
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246 | 60 | $buckets = $this->buildBuckets($models, $this->link); |
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247 | } |
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248 | |||
249 | 60 | $this->indexBy = $indexBy; |
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250 | 60 | if ($this->indexBy !== null && $this->multiple) { |
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251 | 15 | $buckets = $this->indexBuckets($buckets, $this->indexBy); |
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252 | } |
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253 | |||
254 | 60 | $link = array_values(isset($viaQuery) ? $viaQuery->link : $this->link); |
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255 | 60 | foreach ($primaryModels as $i => $primaryModel) { |
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256 | 60 | if ($this->multiple && count($link) === 1 && is_array($keys = $primaryModel[reset($link)])) { |
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257 | $value = []; |
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258 | foreach ($keys as $key) { |
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259 | $key = $this->normalizeModelKey($key); |
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260 | if (isset($buckets[$key])) { |
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261 | if ($this->indexBy !== null) { |
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262 | // if indexBy is set, array_merge will cause renumbering of numeric array |
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263 | foreach ($buckets[$key] as $bucketKey => $bucketValue) { |
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264 | $value[$bucketKey] = $bucketValue; |
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265 | } |
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266 | } else { |
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267 | $value = array_merge($value, $buckets[$key]); |
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268 | } |
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269 | } |
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270 | } |
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271 | } else { |
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272 | 60 | $key = $this->getModelKey($primaryModel, $link); |
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273 | 60 | $value = isset($buckets[$key]) ? $buckets[$key] : ($this->multiple ? [] : null); |
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274 | } |
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275 | 60 | if ($primaryModel instanceof ActiveRecordInterface) { |
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276 | 60 | $primaryModel->populateRelation($name, $value); |
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277 | } else { |
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278 | 60 | $primaryModels[$i][$name] = $value; |
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279 | } |
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280 | } |
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281 | 60 | if ($this->inverseOf !== null) { |
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282 | 3 | $this->populateInverseRelation($primaryModels, $models, $name, $this->inverseOf); |
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283 | } |
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284 | |||
285 | 60 | return $models; |
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286 | } |
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287 | |||
288 | /** |
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289 | * @param ActiveRecordInterface[] $primaryModels primary models |
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290 | * @param ActiveRecordInterface[] $models models |
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291 | * @param string $primaryName the primary relation name |
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292 | * @param string $name the relation name |
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293 | */ |
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294 | 6 | private function populateInverseRelation(&$primaryModels, $models, $primaryName, $name) |
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295 | { |
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296 | 6 | if (empty($models) || empty($primaryModels)) { |
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297 | return; |
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298 | } |
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299 | 6 | $model = reset($models); |
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300 | /* @var $relation ActiveQueryInterface|ActiveQuery */ |
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301 | 6 | $relation = $model instanceof ActiveRecordInterface ? $model->getRelation($name) : (new $this->modelClass())->getRelation($name); |
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302 | |||
303 | 6 | if ($relation->multiple) { |
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304 | 6 | $buckets = $this->buildBuckets($primaryModels, $relation->link, null, null, false); |
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305 | 6 | if ($model instanceof ActiveRecordInterface) { |
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306 | 6 | foreach ($models as $model) { |
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307 | 6 | $key = $this->getModelKey($model, $relation->link); |
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308 | 6 | $model->populateRelation($name, isset($buckets[$key]) ? $buckets[$key] : []); |
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309 | } |
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310 | } else { |
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311 | 3 | foreach ($primaryModels as $i => $primaryModel) { |
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312 | 3 | if ($this->multiple) { |
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313 | foreach ($primaryModel as $j => $m) { |
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314 | $key = $this->getModelKey($m, $relation->link); |
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315 | $primaryModels[$i][$j][$name] = isset($buckets[$key]) ? $buckets[$key] : []; |
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316 | } |
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317 | 3 | } elseif (!empty($primaryModel[$primaryName])) { |
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318 | 3 | $key = $this->getModelKey($primaryModel[$primaryName], $relation->link); |
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319 | 6 | $primaryModels[$i][$primaryName][$name] = isset($buckets[$key]) ? $buckets[$key] : []; |
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320 | } |
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321 | } |
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322 | } |
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323 | } else { |
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324 | 3 | if ($this->multiple) { |
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325 | 3 | foreach ($primaryModels as $i => $primaryModel) { |
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326 | 3 | foreach ($primaryModel[$primaryName] as $j => $m) { |
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327 | 3 | if ($m instanceof ActiveRecordInterface) { |
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328 | 3 | $m->populateRelation($name, $primaryModel); |
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329 | } else { |
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330 | 3 | $primaryModels[$i][$primaryName][$j][$name] = $primaryModel; |
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331 | } |
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332 | } |
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333 | } |
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334 | } else { |
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335 | foreach ($primaryModels as $i => $primaryModel) { |
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336 | if ($primaryModels[$i][$primaryName] instanceof ActiveRecordInterface) { |
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337 | $primaryModels[$i][$primaryName]->populateRelation($name, $primaryModel); |
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338 | } elseif (!empty($primaryModels[$i][$primaryName])) { |
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339 | $primaryModels[$i][$primaryName][$name] = $primaryModel; |
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340 | } |
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341 | } |
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342 | } |
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343 | } |
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344 | 6 | } |
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345 | |||
346 | /** |
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347 | * @param array $models |
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348 | * @param array $link |
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349 | * @param array $viaModels |
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350 | * @param array $viaLink |
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351 | * @param bool $checkMultiple |
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352 | * @return array |
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353 | */ |
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354 | 63 | private function buildBuckets($models, $link, $viaModels = null, $viaLink = null, $checkMultiple = true) |
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355 | { |
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356 | 63 | if ($viaModels !== null) { |
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357 | 36 | $map = []; |
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358 | 36 | $viaLinkKeys = array_keys($viaLink); |
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359 | 36 | $linkValues = array_values($link); |
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360 | 36 | foreach ($viaModels as $viaModel) { |
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361 | 36 | $key1 = $this->getModelKey($viaModel, $viaLinkKeys); |
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362 | 36 | $key2 = $this->getModelKey($viaModel, $linkValues); |
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363 | 36 | $map[$key2][$key1] = true; |
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364 | } |
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365 | } |
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366 | |||
367 | 63 | $buckets = []; |
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368 | 63 | $linkKeys = array_keys($link); |
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369 | |||
370 | 63 | if (isset($map)) { |
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371 | 36 | foreach ($models as $model) { |
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372 | 36 | $key = $this->getModelKey($model, $linkKeys); |
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373 | 36 | if (isset($map[$key])) { |
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374 | 36 | foreach (array_keys($map[$key]) as $key2) { |
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375 | 36 | $buckets[$key2][] = $model; |
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376 | } |
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377 | } |
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378 | } |
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379 | } else { |
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380 | 63 | foreach ($models as $model) { |
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381 | 63 | $key = $this->getModelKey($model, $linkKeys); |
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382 | 63 | $buckets[$key][] = $model; |
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383 | } |
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384 | } |
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385 | |||
386 | 63 | if ($checkMultiple && !$this->multiple) { |
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387 | 15 | foreach ($buckets as $i => $bucket) { |
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388 | 15 | $buckets[$i] = reset($bucket); |
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389 | } |
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390 | } |
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391 | |||
392 | 63 | return $buckets; |
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393 | } |
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394 | |||
395 | |||
396 | /** |
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397 | * Indexes buckets by column name. |
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398 | * |
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399 | * @param array $buckets |
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400 | * @param string|callable $indexBy the name of the column by which the query results should be indexed by. |
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401 | * This can also be a callable (e.g. anonymous function) that returns the index value based on the given row data. |
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402 | * @return array |
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403 | */ |
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404 | 15 | private function indexBuckets($buckets, $indexBy) |
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405 | { |
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406 | 15 | $result = []; |
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407 | 15 | foreach ($buckets as $key => $models) { |
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408 | 15 | $result[$key] = []; |
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409 | 15 | foreach ($models as $model) { |
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410 | 15 | $index = is_string($indexBy) ? $model[$indexBy] : call_user_func($indexBy, $model); |
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411 | 15 | $result[$key][$index] = $model; |
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412 | } |
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413 | } |
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414 | |||
415 | 15 | return $result; |
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416 | } |
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417 | |||
418 | /** |
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419 | * @param array $attributes the attributes to prefix |
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420 | * @return array |
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421 | */ |
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422 | 133 | private function prefixKeyColumns($attributes) |
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423 | { |
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424 | 133 | if ($this instanceof ActiveQuery && (!empty($this->join) || !empty($this->joinWith))) { |
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425 | 24 | if (empty($this->from)) { |
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426 | /* @var $modelClass ActiveRecord */ |
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427 | 6 | $modelClass = $this->modelClass; |
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428 | 6 | $alias = $modelClass::tableName(); |
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429 | } else { |
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430 | 24 | foreach ($this->from as $alias => $table) { |
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431 | 24 | if (!is_string($alias)) { |
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432 | 24 | $alias = $table; |
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433 | } |
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434 | 24 | break; |
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435 | } |
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436 | } |
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437 | 24 | if (isset($alias)) { |
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438 | 24 | foreach ($attributes as $i => $attribute) { |
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439 | 24 | $attributes[$i] = "$alias.$attribute"; |
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440 | } |
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441 | } |
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442 | } |
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443 | |||
444 | 133 | return $attributes; |
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445 | } |
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446 | |||
447 | /** |
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448 | * @param array $models |
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449 | */ |
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450 | 133 | private function filterByModels($models) |
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451 | { |
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452 | 133 | $attributes = array_keys($this->link); |
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453 | |||
454 | 133 | $attributes = $this->prefixKeyColumns($attributes); |
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455 | |||
456 | 133 | $values = []; |
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457 | 133 | if (count($attributes) === 1) { |
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458 | // single key |
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459 | 133 | $attribute = reset($this->link); |
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460 | 133 | foreach ($models as $model) { |
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461 | 133 | if (($value = $model[$attribute]) !== null) { |
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462 | 133 | if (is_array($value)) { |
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463 | $values = array_merge($values, $value); |
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464 | } else { |
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465 | 133 | $values[] = $value; |
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466 | } |
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467 | } |
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468 | } |
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469 | 133 | if (empty($values)) { |
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470 | 133 | $this->emulateExecution(); |
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471 | } |
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472 | } else { |
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473 | // composite keys |
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474 | |||
475 | // ensure keys of $this->link are prefixed the same way as $attributes |
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476 | 3 | $prefixedLink = array_combine( |
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477 | 3 | $attributes, |
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478 | 3 | array_values($this->link) |
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479 | ); |
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480 | 3 | foreach ($models as $model) { |
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481 | 3 | $v = []; |
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482 | 3 | foreach ($prefixedLink as $attribute => $link) { |
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483 | 3 | $v[$attribute] = $model[$link]; |
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484 | } |
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485 | 3 | $values[] = $v; |
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486 | 3 | if (empty($v)) { |
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487 | 3 | $this->emulateExecution(); |
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488 | } |
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489 | } |
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490 | } |
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491 | 133 | $this->andWhere(['in', $attributes, array_unique($values, SORT_REGULAR)]); |
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492 | 133 | } |
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493 | |||
494 | /** |
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495 | * @param ActiveRecordInterface|array $model |
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496 | * @param array $attributes |
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497 | * @return string |
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498 | */ |
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499 | 63 | private function getModelKey($model, $attributes) |
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500 | { |
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501 | 63 | $key = []; |
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502 | 63 | foreach ($attributes as $attribute) { |
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503 | 63 | $key[] = $this->normalizeModelKey($model[$attribute]); |
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504 | } |
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505 | 63 | if (count($key) > 1) { |
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506 | return serialize($key); |
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507 | } |
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508 | 63 | $key = reset($key); |
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509 | 63 | return is_scalar($key) ? $key : serialize($key); |
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510 | } |
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511 | |||
512 | /** |
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513 | * @param mixed $value raw key value. |
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514 | * @return string normalized key value. |
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515 | */ |
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516 | 63 | private function normalizeModelKey($value) |
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517 | { |
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518 | 63 | if (is_object($value) && method_exists($value, '__toString')) { |
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519 | // ensure matching to special objects, which are convertable to string, for cross-DBMS relations, for example: `|MongoId` |
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520 | $value = $value->__toString(); |
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521 | } |
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522 | |||
523 | 63 | return $value; |
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524 | } |
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525 | |||
526 | /** |
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527 | * @param array $primaryModels either array of AR instances or arrays |
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528 | * @return array |
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529 | */ |
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530 | 21 | private function findJunctionRows($primaryModels) |
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531 | { |
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532 | 21 | if (empty($primaryModels)) { |
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533 | return []; |
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534 | } |
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535 | 21 | $this->filterByModels($primaryModels); |
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536 | /* @var $primaryModel ActiveRecord */ |
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537 | 21 | $primaryModel = reset($primaryModels); |
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538 | 21 | if (!$primaryModel instanceof ActiveRecordInterface) { |
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539 | // when primaryModels are array of arrays (asArray case) |
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540 | $primaryModel = $this->modelClass; |
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541 | } |
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542 | |||
543 | 21 | return $this->asArray()->all($primaryModel::getDb()); |
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544 | } |
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545 | } |
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546 |
If you access a property on an interface, you most likely code against a concrete implementation of the interface.
Available Fixes
Adding an additional type check:
Changing the type hint: