multiple node type in a list

I have googled around to no avail, is it possible to have a graphene list that has multiple types? I have a model with a property that returns a list of 2 related sets like so:

    @memoized_property
    def assets(self):
        return list(
            chain(self.fileasset_set.all(), self.questionasset_set.all())
        )

how can I describe that properly using graphene? Is it possible to dynamically deduce what kind of Node during runtime? I want to be able to express, for example or something close to:

assets {
  edges {
      node {
             ...FileAsset {
                uploader
             }
            ...QuestionAsset {
                author
            }
      }
   }
}

any way to do this?

[mjtamlyn]

Your field needs to return a union type. These aren’t currently documented as far as I can see, which is a bit odd, I thought they used to be. Anyway, the code looks like this:

class AssetUnion(graphene.types.Union):
    class Meta:
        types = [FileAssetNode, QuestionAssetNode]

class ParentNode(graphene.ObjectType):
    assets = graphene.Field(AssetUnion)
    def resolve_assets(…):
        return chain(self.fileasset_set.all(), self.questionasset_set.all())

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