Make ImageDerivative configurable to return additional properties

[chasinhues]

Resolves #1120

Usage

Use ImageDerivative to extract extra properties from File entities such as filename, uri, filemime, etc. See Drupal's File entity for full list of field_name's that can be used.

Make sure you update your schema definition to include the additional properties you use from ImageDerivative.

Example

    // MySchemaExtension.php

    ...

    $registry->addFieldResolver('MyResolveType', 'images',
      $builder->compose(
        $builder->produce('entity_reference')
          ->map('entity', $builder->fromParent())
          ->map('field', $builder->fromValue('field_images')),
        $builder->map(
          $builder->produce('image_derivative')
            ->map('entity', $builder->fromParent())
            ->map('style', $builder->fromValue('submission_media_carousel'))
            ->map('additional_properties', $builder->fromValue(['filename', 'filemime']))
        )
      )
    );

// my_graphql.graphqls

...

type Image {
  id: Int!
  url: String!
  width: Int
  height: Int
  filename: String!
  filemime: String!
}

[Boby]

tried it I got a :

TypeError: Argument 1 passed to Drupal\graphql\Plugin\GraphQL\DataProducer\Entity\Fields\Image\ImageDerivative::resolve() must implement interface Drupal\file\FileInterface or be null, instance of Drupal\media\Entity\Media given in Drupal\graphql\Plugin\GraphQL\DataProducer\Entity\Fields\Image\ImageDerivative->resolve() (line 91 of modules/contrib/graphql/src/Plugin/GraphQL/DataProducer/Entity/Fields/Image/ImageDerivative.php).

[Berdir]

that information is on the image. seems a bit strange to put it on this level, can't you get that elsewhere?

I actually came here looking for a way to not return image/width as it can be expensive to calculate.