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<?php |
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namespace betadog\yii1; |
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/** |
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* Класс для автоматического отслеживания и порядка сортировки элементов |
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* |
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* TIP: отслежтваемую колонку не надо добавлять в rules() |
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* |
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* Usage: |
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* |
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<pre> |
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public function behaviors() |
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{ |
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return [ |
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'orderingAttribute' => [ |
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'class' => 'betadog\\yii1\\OrderingValueBehavior', |
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// колонка по которой осуществляется сортировка |
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'columnName' => 'ordering', |
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// на какое место ставится новый элемент |
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'position' => \betadog\yii1\OrderingValueBehavior::POSITION_END |
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], |
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]; |
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} |
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</pre> |
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*/ |
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class OrderingValueBehavior extends \CActiveRecordBehavior |
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{ |
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const POSITION_START = 0; |
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const POSITION_END = 1; |
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/** @var string */ |
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public $columnName; |
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/** @var int */ |
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public $position = self::POSITION_START; |
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public function attach($owner) |
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{ |
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$validator = \CValidator::createValidator('numerical', $owner, $this->columnName, [ |
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'integerOnly' => true, |
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'allowEmpty' => false, |
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]); |
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$owner->validatorList->add($validator); |
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parent::attach($owner); |
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} |
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public function beforeValidate($event) |
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{ |
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/** @var \CActiveRecord $owner */ |
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$owner = $this->getOwner(); |
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if ($owner->getIsNewRecord()) { |
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$fieldName = \Yii::app()->db->quoteColumnName($this->columnName); |
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$position = \Yii::app()->db->createCommand() |
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->select("MAX($fieldName)") |
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->from($owner->tableName()) |
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->queryScalar(); |
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$owner->{$this->columnName} = $position + 1; |
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} |
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} |
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public function afterSave($event) |
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{ |
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/** @var \CActiveRecord $owner */ |
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$owner = $this->getOwner(); |
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/** |
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* self::POSITION_END set in validator |
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*/ |
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if ($owner->getIsNewRecord() && self::POSITION_START == $this->position) { |
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$fieldName = \Yii::app()->db->quoteColumnName($this->columnName); |
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$minPosition = \Yii::app()->db->createCommand() |
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->select("MIN($fieldName)") |
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->from($owner->tableName()) |
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->queryScalar(); |
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\Yii::app()->db->createCommand()->update($owner->tableName(), [$this->columnName => new \CDbExpression("{$fieldName} + 1")]); |
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\Yii::app()->db->createCommand()->update($owner->tableName(), [$this->columnName => $minPosition], 'id = :id', [':id' => $owner->id]); |
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} |
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} |
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} |
betadog /
yii1-reusable-components
