I want to serialize into JSON entity Category with collection of Presentation entities (see below) to use for REST API.
The endpoint will look something like this /api/v1/categories/1
When dataset is small and when Category only has only 5-10 related Presentations then the resulting response is not too large. However when Category starts to have let's say 100 or 200 related Presentations then obviously I do not want to return all of them, but would like to "paginate" the results, eg. when calling endpoint:
/api/v1/categories/1?page=2 - would return only "2nd page"
/api/v1/categories/1/page=3 - would return "3rd page"
or even it can be with offset and limit:
/api/v1/categories/1?offset=20&limit=10
but the problem is: how to make JMS serializer serialize only a slice of the collection?
/**
* @ORM\Entity(repositoryClass="AppBundle\Repository\CategoryRepository")
*/
class Category
{
/**
* @var string
* @ORM\Column(type="string")
* @JMS\Expose()
* @JMS\Groups({"get-category"})
*/
private $title;
// ...
/**
* @var ArrayCollection
* @ORM\ManyToMany(targetEntity="AppBundle\Entity\Presentation", mappedBy="categories", fetch="EXTRA_LAZY")
* @JMS\Groups({"get-category"})
* @JMS\Expose()
*/
private $presentations;
// ...
}
ps. I know that for example if I want to get always first 5 elements of the collection, I can add created @VirtualProperty and slice the doctrine ArrayCollection as shown below. But the problem here is that I cannot pass the offset parameters to this method. As it would be called internally by JMSSerializer somewhere...
/**
* @JMS\VirtualProperty()
*
*/
public function getFirstFivePresentations(){
return $this->presentations->slice(0,5);
}
