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Calculated fields

See original GitHub issue

How do we access calculated fields? In a serializer I would do something like

class ArtworkSerializer(serializers.ModelSerializer):
    url = serializers.URLField(source='get_absolute_url')

    class Meta:
        model = Artwork
        fields = ('id', 'title', 'url')

I assume I need to specify this somehow in class ArtworkNode(DjangoNode): but I’ve been unable to discover how.

Issue Analytics

  • State:closed
  • Created 8 years ago
  • Comments:7 (3 by maintainers)

github_iconTop GitHub Comments

syrusakbarycommented, Feb 2, 2016

Sure. You can do it using arguments.

class Query(graphene.ObjectType):
    artwork = graphene.Field(ArtworkNode, slug=graphene.String())

    def resolve_artwork(self, args, info):
        return Artwork.get_by_slug(args.get('slug', None))

Then you can query it with the following query:

  artwork(slug:"my_slug") {

Hope it helps!

syrusakbarycommented, Feb 2, 2016

Great! However I’m going to add the source option to fields! It makes it much more pleasant to develop!

So you can do something like

class ArtworkNode(DjangoNode):
    url = graphene.String(source='get_absolute_url')

    class Meta:
        model = Artwork
        filter_fields = ['id', 'title']
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