/**
  * Parse an array with fileId and caption into an {{\luya\admin\file\Iterator}} object.
  *
  * @param array $values The array with key 'fileId' like `[['fileId' => 1, 'caption' => 'test']]`.
  * @return \luya\admin\file\Iterator The iterator object from the parsed values or an empty array if empty.
  */
 protected function parseFileIteration(array $values)
 {
     if (empty($values)) {
         return [];
     }
     return (new Query())->where(['in', 'id', ArrayHelper::getColumn($values, 'fileId')])->all();
 }
 private function getExtraAssignData()
 {
     $ids = ArrayHelper::getColumn($this->getContextConfigValue($this->varName, []), 'value');
     $provider = new ActiveDataProvider(['query' => $this->_query->andWhere(['in', 'id', $ids])]);
     return $provider->getModels();
 }
 /**
  * Get an array with all ids for the storage component. Only the image ids for the current
  * model/item id should be returned:
  *
  * ```php
  * return [1,2,3]; // where 1,2,3 are ids of the image from the storage component
  * ```
  *
  * @return array An array where only the images are returned.
  */
 public function flowListImages()
 {
     return ArrayHelper::getColumn((new Query())->select([$this->getConfigValue('imageField')])->from($this->getConfigValue('table'))->where([$this->getConfigValue('itemField') => $this->id])->indexBy($this->getConfigValue('imageField'))->all(), $this->getConfigValue('imageField'));
 }