PHP 클래스 Symfony\Bundle\DoctrineBundle\Form\ValueTransformer\CollectionToStringTransformer
Use-Cases for this transformer include: List of Tag-Names, List Of Group/User-Names or the like.
This transformer only makes sense if you know the list of related collections to be small and
that they have a unique identifier field that is of meaning to the user (Tag Names) and is
enforced to be unique in the storage.
This transformer can cause the following SQL operations to happen in the case of an ORM collection:
1. Initialize the whole collection using one SELECT query
2. For each removed element issue an UPDATE or DELETE stmt (depending on one-to-many or many-to-many)
3. For each inserted element issue an INSERT or UPDATE stmt (depending on one-to-many or many-to-many)
4. Extra updates if necessary by the ORM.
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프로젝트 열기: pmjones/php-framework-benchmarks
공개 메소드들
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설명 |
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reverseTransform ( string $value, Doctrine\Common\Collections\Collection $collection ) |
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transform ( Doctrine\Common\Collections\Collection $value ) : string |
Transform a Doctrine Collection into a string of identifies with a separator. |
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