| Total Complexity | 41 | 
| Total Lines | 296 | 
| Duplicated Lines | 0 % | 
| Changes | 0 | ||
Complex classes like PivotTrait often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use PivotTrait, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 16 | trait PivotTrait  | 
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| 17 | { | 
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| 18 | protected $_storage = [];  | 
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| 19 | protected $_storageAttributes = [];  | 
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| 20 | |||
| 21 | /**  | 
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| 22 | * @param string|ActiveRecord $pivotClass  | 
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| 23 | *  | 
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| 24 | * @return mixed  | 
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| 25 | */  | 
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| 26 | public function deletePivots($pivotClass)  | 
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| 27 |     { | 
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| 28 | return $pivotClass::deleteAll([$this->getMainPkField($this, $pivotClass) => $this->getMainPk()]);  | 
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| 29 | }  | 
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| 30 | |||
| 31 | /**  | 
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| 32 | * @param string $pivotClass  | 
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| 33 | *  | 
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| 34 | * @return ActiveRecord[]  | 
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| 35 | */  | 
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| 36 | public function getStoragePivots($pivotClass)  | 
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| 37 |     { | 
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| 38 |         if (isset($this->_storage[$pivotClass])) { | 
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| 39 | return $this->_storage[$pivotClass];  | 
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| 40 |         } else { | 
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| 41 | return [];  | 
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| 42 | }  | 
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| 43 | }  | 
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| 44 | |||
| 45 | /**  | 
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| 46 | * @return array  | 
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| 47 | */  | 
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| 48 | public function getPivotStorage()  | 
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| 49 |     { | 
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| 50 | return $this->_storage;  | 
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| 51 | }  | 
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| 52 | |||
| 53 | /**  | 
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| 54 | * @param ActiveRecord|null $model  | 
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| 55 | * @param string|ActiveRecord $pivotClass  | 
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| 56 | * @return array  | 
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| 57 | */  | 
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| 58 | private function getPivotCondition($model, $pivotClass)  | 
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| 59 |     { | 
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| 60 | $mainPk = $this->getPkField($this, $pivotClass);  | 
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                         | 
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| 61 | $condition = [$mainPk => $this->getMainPk()];  | 
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| 62 |         if (!is_null($model)) { | 
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| 63 | $slavePk = $this->getSlavePkField($model, $pivotClass);  | 
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| 64 | $condition[$slavePk] = $model->getAttribute($model->primaryKey()[0]);  | 
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| 65 | }  | 
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| 66 | return $condition;  | 
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| 67 | }  | 
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| 68 | |||
| 69 | /**  | 
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| 70 | * @param ActiveRecord $model  | 
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| 71 | * @param string|ActiveRecord $pivotClass  | 
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| 72 | * @param array $condition  | 
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| 73 | * @return ActiveRecord|null  | 
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| 74 | */  | 
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| 75 | public function getPivot($model, $pivotClass, $condition = [])  | 
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| 76 |     { | 
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| 77 | return $this->findPivot($model, $pivotClass)->andWhere($condition)->one();  | 
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| 78 | }  | 
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| 79 | |||
| 80 | /**  | 
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| 81 | * @param string|ActiveRecord $pivotClass  | 
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| 82 | * @param array $condition  | 
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| 83 | * @return ActiveRecord[]  | 
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| 84 | */  | 
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| 85 | public function getPivots($pivotClass, $condition = [])  | 
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| 86 |     { | 
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| 87 | return $this->findPivots($pivotClass)->andWhere($condition)->all();  | 
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| 88 | }  | 
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| 89 | |||
| 90 | /**  | 
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| 91 | * @param ActiveRecord $model  | 
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| 92 | * @param string|ActiveRecord $pivotClass  | 
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| 93 | * @return ActiveQuery  | 
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| 94 | */  | 
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| 95 | public function findPivot($model, $pivotClass)  | 
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| 96 |     { | 
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| 97 | return $pivotClass::find()->andWhere($this->getPivotCondition($model, $pivotClass));  | 
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| 98 | }  | 
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| 99 | |||
| 100 | /**  | 
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| 101 | * @param string|ActiveRecord $pivotClass  | 
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| 102 | * @return ActiveQuery  | 
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| 103 | */  | 
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| 104 | public function findPivots($pivotClass)  | 
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| 105 |     { | 
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| 106 | return $this->findPivot(null, $pivotClass);  | 
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| 107 | }  | 
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| 108 | |||
| 109 | /**  | 
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| 110 | * @param string $pivotClass  | 
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| 111 | */  | 
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| 112 | public function clearStorage($pivotClass)  | 
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| 115 | }  | 
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| 116 | |||
| 117 | /**  | 
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| 118 | * @param ActiveRecord[] $models  | 
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| 119 | * @param string $pivotClass  | 
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| 120 | * @param null $modelClass  | 
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| 121 | */  | 
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| 122 | public function storagePivots($models, $pivotClass, $modelClass = null)  | 
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| 123 |     { | 
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| 124 |         if (!is_array($models)) { | 
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| 125 | $models = [$models];  | 
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| 126 | }  | 
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| 127 |         foreach ($models as $model) { | 
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| 128 | $this->storagePivot($model, $pivotClass, $modelClass);  | 
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| 129 | }  | 
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| 130 | }  | 
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| 131 | |||
| 132 | /**  | 
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| 133 | * @param ActiveRecord $model  | 
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| 134 | * @param ActiveRecord|string $pivotClass  | 
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| 135 | * @param ActiveRecord $modelClass  | 
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| 136 | *  | 
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| 137 | * @param array $pvAttributes  | 
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| 138 | * @throws \Exception  | 
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| 139 | */  | 
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| 140 | public function storagePivot($model, $pivotClass, $modelClass = null, $pvAttributes = [])  | 
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| 141 |     { | 
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| 142 |         if (is_numeric($model) && $modelClass) { | 
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| 143 | $model = $modelClass::findOne($model);  | 
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| 144 |         } elseif (is_array($model)) { | 
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| 145 | $model = \Yii::createObject($model);  | 
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| 146 | }  | 
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| 147 |         if (!($model instanceof Model)) { | 
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| 148 |             throw new \Exception('Cannot determine or model not found'); | 
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| 149 | }  | 
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| 150 | $this->_storage[$pivotClass][] = $model;  | 
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| 151 | $this->_storageAttributes[$pivotClass][spl_object_hash($model)] = $pvAttributes;  | 
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| 152 | }  | 
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| 153 | |||
| 154 | public function getStoragePivotAttribute($model, $pivotClass)  | 
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| 155 |     { | 
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| 156 | return ArrayHelper::getValue($this->_storageAttributes, $pivotClass . '.' . spl_object_hash($model), []);  | 
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| 157 | }  | 
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| 158 | |||
| 159 | /**  | 
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| 160 | * @param bool $clear  | 
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| 161 | */  | 
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| 162 | public function savePivots($clear = false)  | 
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| 163 |     { | 
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| 164 |         foreach ($this->getPivotStorage() as $pivotClass => $items) { | 
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| 165 |             if ($clear) { | 
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| 166 | $this->deletePivots($pivotClass);  | 
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| 167 | }  | 
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| 168 |             foreach ($items as $item) { | 
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| 169 | $this->addPivot($item, $pivotClass);  | 
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| 170 | }  | 
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| 171 | }  | 
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| 172 | }  | 
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| 173 | |||
| 174 | /**  | 
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| 175 | * @param $model  | 
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| 176 | * @param $pivotClass  | 
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| 177 | * @param array $attributes  | 
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| 178 | * @return array|null|ActiveRecord  | 
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| 179 | * @throws \Exception  | 
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| 180 | */  | 
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| 181 | public function addPivot($model, $pivotClass, $attributes = [])  | 
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| 182 |     { | 
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| 183 | /**  | 
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| 184 | * @var ActiveRecord $pv  | 
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| 185 | */  | 
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| 186 | $pv = new $pivotClass;  | 
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| 187 | $attributes = $attributes ? $attributes : $this->getStoragePivotAttribute($model, $pivotClass);  | 
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| 188 | $condition = $this->getPivotCondition($model, $pivotClass);  | 
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| 189 |         if ($find = (new ActiveQuery($pivotClass))->andWhere($condition)->one()) { | 
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| 190 |             if ($attributes) { | 
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| 191 | $find->setAttributes($attributes, false);  | 
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| 192 | $find->save();  | 
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| 193 | }  | 
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| 194 | return $find;  | 
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| 195 |         } else { | 
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| 196 | $pv->setAttributes(array_merge($condition, $attributes), false);  | 
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| 197 | $pv->save();  | 
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| 198 | return $pv;  | 
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| 199 | }  | 
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| 200 | }  | 
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| 201 | |||
| 202 | /**  | 
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| 203 | * @param ActiveRecord $model  | 
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| 204 | * @param string|ActiveRecord $pivotClass  | 
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| 205 | * @return mixed  | 
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| 206 | */  | 
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| 207 | public function deletePivot($model, $pivotClass)  | 
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| 208 |     { | 
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| 209 | return $pivotClass::deleteAll([  | 
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| 210 | $this->getMainPkField($this, $pivotClass) => $this->getMainPk(),  | 
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| 211 |             $this->getSlavePkField($model, $pivotClass) => $model->{$model->primaryKey()[0]} | 
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| 212 | ]);  | 
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| 213 | }  | 
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| 214 | |||
| 215 | |||
| 216 | /**  | 
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| 217 | * @return mixed  | 
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| 218 | */  | 
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| 219 | protected function getMainPk()  | 
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| 220 |     { | 
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| 221 | /**  | 
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| 222 | * @var ActiveRecord $this  | 
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| 223 | */  | 
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| 224 |         return $this->{$this->primaryKey()[0]}; | 
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| 225 | }  | 
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| 226 | |||
| 227 | /**  | 
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| 228 | * @param $model  | 
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| 229 | * @param string|ActiveRecord $pivotClass  | 
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| 230 | * @return string  | 
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| 231 | */  | 
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| 232 | protected function getMainPkField($model, $pivotClass)  | 
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| 233 |     { | 
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| 234 | /**  | 
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| 235 | * @var ActiveRecord $this  | 
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| 236 | */  | 
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| 237 | return $this->getPkField($model, $pivotClass);  | 
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| 238 | }  | 
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| 239 | |||
| 240 | /**  | 
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| 241 | * @param $model  | 
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| 242 | * @param string|ActiveRecord $pivotClass  | 
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| 243 | * @return string  | 
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| 244 | */  | 
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| 245 | protected function getSlavePkField($model, $pivotClass)  | 
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| 246 |     { | 
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| 247 | return $this->getPkField($model, $pivotClass, true);  | 
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| 248 | }  | 
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| 249 | |||
| 250 | /**  | 
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| 251 | * @param ActiveRecord $model  | 
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| 252 | * @param ActiveRecord|string $pivotClass  | 
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| 253 | * @param bool $slave  | 
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| 254 | * @return int|null|string  | 
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| 255 | */  | 
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| 256 | private function getPkField($model, $pivotClass, $slave = false)  | 
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| 266 | }  | 
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| 267 | }  | 
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| 268 | |||
| 269 | /**  | 
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| 270 | * @param ActiveRecord $model  | 
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| 271 | * @param ActiveRecord|string $pivotClass  | 
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| 272 | * @return string  | 
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| 273 | */  | 
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| 274 | private function getPkFieldByModel($model, $pivotClass)  | 
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| 295 | }  | 
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| 296 | |||
| 297 | /**  | 
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| 298 | * @param $array  | 
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| 299 | * @return array  | 
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| 300 | */  | 
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| 301 | private static function formFkKeys($array)  | 
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| 302 |     { | 
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| 303 | $result = [];  | 
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| 304 |         foreach ($array as $key => $data) { | 
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| 305 | $result[$key] = [  | 
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| 306 | 'table' => ArrayHelper::remove($data, 0),  | 
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| 312 | }  | 
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| 313 | }  |