[GraphQL] Custom types, queries and mutations

[alanpoulain]

No description provided.

[soyuka]

Note also that:?

[dunglas]

Great feature! GraphQL support starts to be very convenient.

[dunglas]

Suggested change

	### Custom queries
	### Custom Queries

[dunglas]

Suggested change

	### Custom mutations
	### Custom Mutations

[dunglas]

Suggested change

	Creating custom mutations is like creating the [custom queries](#custom-queries).
	Creating custom mutations is like creating [custom queries](#custom-queries).

[dunglas]

Same here, iterable?

[alanpoulain]

For the context? I think having an array is enough.

[dunglas]

Suggested change

	## Custom types
	## Custom Types

[dunglas]

Suggested change

	## Modify the extracted types
	## Modifying the Extracted Types

[milosa]

I have been trying to add a custom query the way it is described in this PR.
I added this to my Product entity:

 * @ApiResource(graphql={
 *     "collectionQuery"={
 *         "collection_query"=ProductCollectionResolver::class
 *     }
 *     })

resolver:

    /**
     * @param Product[] $collection
     * @param array $context
     * @param ProductRepository $productRepository
     * @return Product[]
     */
    public function __invoke($collection, array $context, ProductRepository $productRepository)
    {
        return $productRepository->findProductsByTagCollection(1);
    }

I expected this to just add an extra query, but what happens is that it completely removes all the default queries and mutations (create, update, delete) related to the Product entity and the inputs and payloads for them.

Maybe I'm doing something wrong?

[alanpoulain]

Yes you need to add them too, like REST custom actions: https://api-platform.com/docs/core/operations/#recommended-method