SearchFilter on relation / nested attribute

I’m trying to filter on a relation property, and following the docs I added an annotation on the property:

    /**
     * @Groups({"campaign:get",  "campaign:post"})
     *
     * @ApiFilter(SearchFilter::class, properties={"product.name": "ipartial"})
     *
     * @ORM\ManyToOne(targetEntity="App\Entity\product", inversedBy="campaigns")
     * @ORM\JoinColumn(nullable=false)
     */
    private $product;

Then, acessing the resource at {{url}}/api/campaigns/?product.name=CAM return all resources, including those that do not match the search.

Am I missing anything else in order to enable the filter?

[Lobosque]

@soyuka the problem was appending a slash and getting a 301 redirect:

{{url}}/api/campaigns/?product.name=art ---> do not work
{{url}}/api/campaigns?product.name=art  ----> works

I only figured this out thanks to your tip about using the Hydra serialization. It looks like with the redirect, the dot get translated to an underscore somewhere:

    "hydra:view": {
        "@id": "/api/campaigns?product_name=art",
        "@type": "hydra:PartialCollectionView"
    },

While this is definitely a bug, this is probably not related to Api Platform.

[teohhanhui]

Indeed, it’s how PHP processes the query parameters. There’s nothing we could do about it if the original information is lost.