How can I modify an existing field?

[simplenotezy]

Whenever I query an image from Advanced Custom Fields, I'd like to be able to add some custom logic. I've went through documentation but can't spot anything related to this.

So currently I can do image { altText } but what if I wanted to extend so I could do a custom query, e.g. image { somethingCustom }? Ideally I define this one place, and it would take effect everywhere I need the "image"/"media" object.

[simplenotezy]

Hmm - it was easier than I thought:

        register_graphql_field('MediaItem', 'custom', [
            'type' => 'Json',
            'description' => __('Some description'),
            'resolve' => function ($fields) {
                return [
                    'hi'
                ];
            }
        ]);