Bump ariadne-codegen version

infrahub_sdk/ctl/graphql.py

@@ -16,7 +16,19 @@
 )
 from ariadne_codegen.settings import ClientSettings, CommentsStrategy
 from ariadne_codegen.utils import ast_to_str
-from graphql import DefinitionNode, GraphQLSchema, NoUnusedFragmentsRule, parse, specified_rules, validate
+from graphql import (
+    DefinitionNode,
+    GraphQLField,
+    GraphQLInterfaceType,
+    GraphQLNonNull,
+    GraphQLObjectType,
+    GraphQLSchema,
+    GraphQLString,
+    NoUnusedFragmentsRule,
+    parse,
+    specified_rules,
+    validate,
+)
 from rich.console import Console
 
 from ..async_typer import AsyncTyper
@@ -40,6 +52,24 @@
 ]
 
 
+def inject_typename_into_schema(schema: GraphQLSchema) -> None:
+    """Inject __typename as an explicit field on each object type in the schema.
+
+    ariadne-codegen adds __typename automatically when generating types for abstract-typed
+    (interface/union) fields, then tries to resolve __typename via schema.type_map.fields.
+    The lookup fails because __typename is a built-in meta-field, not a schema-defined field.
+    The ariadne-codegen fallback incorrectly creates a new GraphQLScalarType("String"), which
+    raises TypeError because "String" is a reserved built-in type.
+
+    Injecting __typename with the existing GraphQLString scalar fixes the lookup so codegen
+    can generate typed Pydantic models for queries that traverse interface-typed relationships.
+    """
+    typename_field = GraphQLField(GraphQLNonNull(GraphQLString))
+    for type_def in schema.type_map.values():
+        if isinstance(type_def, (GraphQLObjectType, GraphQLInterfaceType)) and "__typename" not in type_def.fields:
+            type_def.fields["__typename"] = typename_field
+
+
 def find_gql_files(query_path: Path) -> list[Path]:
     """
     Find all files with .gql extension in the specified directory.
@@ -133,6 +163,7 @@ async def generate_return_types(
     if not schema.exists():
         raise FileNotFoundError(f"GraphQL Schema file not found: {schema}")
     graphql_schema = get_graphql_schema_from_path(schema_path=str(schema))
+    inject_typename_into_schema(graphql_schema)
 
     # Initialize the plugin manager
     plugin_manager = PluginManager(