/**
* Retrieve subordinate coupons
*
* @return \Magento\SalesRule\Model\Coupon[]
*/
public function getCoupons()
{
if ($this->_coupons === null) {
$this->_couponCollection->addRuleToFilter($this);
$this->_coupons = $this->_couponCollection->getItems();
}
return $this->_coupons;
}
/**
* Helper function that adds a FilterGroup to the collection.
*
* @param \Magento\Framework\Api\Search\FilterGroup $filterGroup
* @param Collection $collection
* @return void
*/
protected function addFilterGroupToCollection(\Magento\Framework\Api\Search\FilterGroup $filterGroup, Collection $collection)
{
$fields = [];
$conditions = [];
foreach ($filterGroup->getFilters() as $filter) {
$condition = $filter->getConditionType() ? $filter->getConditionType() : 'eq';
$fields[] = $filter->getField();
$conditions[] = [$condition => $filter->getValue()];
}
if ($fields) {
$collection->addFieldToFilter($fields, $conditions);
}
}