Strawberry GraphQL @ 0.330.2

Released October 3, 2026 at 11:21 PM GMT+00:00

This release fixes types that inherit an interface through a class that isn’t decorated with Strawberry. Strawberry listed the interface more than once for these types, so building the schema failed with errors like Type Fruit can only implement Node once.

This happened, for example, when sharing resolve_nodes between relay.Node types with a base class:

import strawberry
from strawberry import relay
 
 
class DatabaseNode(relay.Node):
    @classmethod
    def resolve_nodes(cls, *, info, node_ids, required=False):
        return [load(cls, node_id) for node_id in node_ids]
 
 
@strawberry.type
class Fruit(DatabaseNode):
    id: relay.NodeID[int]
    name: str

Fruit now implements Node once. The same applies to interfaces that extend another interface through an undecorated class, and the error raised when an input inherits an interface this way now lists the interface once.

A class like DatabaseNode can share methods such as resolve_nodes , but Strawberry ignores fields declared on it. To share fields too, decorate it with @strawberry.interface or @strawberry.type .

This release was contributed by @patrick91 in https://github.com/strawberry-graphql/strawberry/pull/4661