Including self-referential fields in InputObjectType subclass

I am trying to create an InputObjectType that has dynamic fields that is meant for complex filtering of fields but that also contains a couple of self-referencing fields to allow boolean operations (AND, OR). Here is a concrete example of what I am trying to do, taken from here:

input FriendlyUserFilter {
  sys: SysFilter
  name: String
  name_not: String
  name_exists: Boolean
  name_contains: String
  # ... more name filters
  age: Number
  age_gt: Number
  age_lt: Number
  # ... more age filters
  AND: [FriendlyUserFilter]
  OR: [FriendlyUserFilter]
}

I am using the technique described here to do so. I’m curious how to implement the AND and OR functionality that includes a reference to the class itself.

[art1415926535]

Hmm… Maybe like this?

class BaseFilter(graphene.InputObjectType):
    @classmethod
    def __init_subclass_with_meta__(cls, *args, **kwargs):
        super().__init_subclass_with_meta__(*args, **kwargs)
        field = graphene.InputField(graphene.List(graphene.NonNull(cls)))
        cls._meta.fields.update({'or': field, 'and': field})

    class Meta:
        abstract = True


class UserFilter(BaseFilter):
    name = graphene.String()

Same result as https://github.com/graphql-python/graphene/issues/1063#issuecomment-527537653 (+NonNull)

[art1415926535]

Hi, do you need something like that?

class UserFilters(graphene.InputObjectType):
    name = graphene.String()
    or_ = graphene.Field(graphene.List(lambda: UserFilters), name='or')
    and_ = graphene.Field(graphene.List(lambda: UserFilters), name='and')


class Query(ObjectType):
    all_users = ConnectionField(
        UserConnection, filters=UserFilters()
    )

Result (graphiql):