DuplicatedTypeName Exception after Upgrade

[truesang]

After upgrading from v0.70.1 to the latest v0.73.1, I'm getting DuplicatedTypeName exception during Django startup:

strawberry.exceptions.duplicated_type_name.DuplicatedTypeName: Type StrFilterLookup is defined multiple times in the schema

Describe the Bug

I don't believe I have any custom StrFilterLookups in the project. It looks like the v0.71.0 is the first version I'd get this exceptions.

System Information

• Operating system: Debian
• Python version: 3.13.9

Additional Context

Traceback (most recent call last):
  File "/usr/local/lib/python3.13/threading.py", line 1043, in _bootstrap_inner
    self.run()
    ~~~~~~~~^^
  File "/usr/local/lib/python3.13/threading.py", line 994, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/utils/autoreload.py", line 64, in wrapper
    fn(*args, **kwargs)
    ~~^^^^^^^^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/core/management/commands/runserver.py", line 134, in inner_run
    self.check(**check_kwargs)
    ~~~~~~~~~~^^^^^^^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/core/management/base.py", line 496, in check
    all_issues = checks.run_checks(
        app_configs=app_configs,
    ...<2 lines>...
        databases=databases,
    )
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/core/checks/registry.py", line 89, in run_checks
    new_errors = check(app_configs=app_configs, databases=databases)
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/core/checks/urls.py", line 16, in check_url_config
    return check_resolver(resolver)
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/core/checks/urls.py", line 26, in check_resolver
    return check_method()
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/urls/resolvers.py", line 531, in check
    for pattern in self.url_patterns:
                   ^^^^^^^^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/utils/functional.py", line 47, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
                                         ~~~~~~~~~^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/urls/resolvers.py", line 718, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
                       ^^^^^^^^^^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/utils/functional.py", line 47, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
                                         ~~~~~~~~~^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/django/urls/resolvers.py", line 711, in urlconf_module
    return import_module(self.urlconf_name)
  File "/usr/local/lib/python3.13/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1027, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/home/apps/app1/app/urls.py", line 26, in <module>
    from .schema import PrivateGraphQLView, schema
  File "/home/apps/app1/app/schema.py", line 19, in <module>
    schema = strawberry.Schema(
        query=Query,
        types=additional_types,
        extensions=[DjangoOptimizerExtension],
    )
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/strawberry/schema/schema.py", line 351, in __init__
    raise error.__cause__ from None
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/graphql/type/definition.py", line 1495, in fields
    fields = resolve_thunk(self._fields)
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/graphql/type/definition.py", line 318, in resolve_thunk
    return thunk() if callable(thunk) else thunk
           ~~~~~^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/strawberry/schema/schema_converter.py", line 531, in <lambda>
    fields=lambda: self.get_graphql_input_fields(type_definition),
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/strawberry/schema/schema_converter.py", line 488, in get_graphql_input_fields
    return _get_thunk_mapping(
        type_definition=type_definition,
    ...<2 lines>...
        get_fields=self.get_fields,
    )
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/strawberry/schema/schema_converter.py", line 143, in _get_thunk_mapping
    thunk_mapping[name_converter(field)] = field_converter(
                                           ~~~~~~~~~~~~~~~^
        field,
        ^^^^^^
        type_definition=type_definition,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/strawberry/schema/schema_converter.py", line 453, in from_input_field
    self.from_maybe_optional(
    ~~~~~~~~~~~~~~~~~~~~~~~~^
        field.resolve_type(type_definition=type_definition)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ),
    ^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/strawberry/schema/schema_converter.py", line 866, in from_maybe_optional
    return self.from_type(type_.of_type)
           ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/strawberry/schema/schema_converter.py", line 882, in from_type
    return self.from_input_object(type_)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/strawberry/schema/schema_converter.py", line 503, in from_input_object
    self.validate_same_type_definition(type_name, type_definition, cached_type)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/apps/app1/.venv/lib/python3.13/site-packages/strawberry/schema/schema_converter.py", line 1040, in validate_same_type_definition
    raise DuplicatedTypeName(first_origin, second_origin, name)
strawberry.exceptions.duplicated_type_name.DuplicatedTypeName: Type StrFilterLookup is defined multiple times in the schema

[MaehMaeh]

I have the same problem. I use the following configuration:
Windows 10
Python 3.14.0
Django 5.2.10
Strawberry 0.289.0
Strawberry-Django 0.73.1

Traceback (most recent call last):
  File "[PYTHON_PATH]\Python\Python314\Lib\multiprocessing\process.py", line 320, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "[PYTHON_PATH]\Python\Python314\Lib\multiprocessing\process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "[APP_PATH]\venv\Lib\site-packages\uvicorn\_subprocess.py", line 80, in subprocess_started
    target(sockets=sockets)
    ~~~~~~^^^^^^^^^^^^^^^^^
  File "[APP_PATH]\venv\Lib\site-packages\uvicorn\server.py", line 67, in run
    return asyncio_run(self.serve(sockets=sockets), loop_factory=self.config.get_loop_factory())
  File "[PYTHON_PATH]\Python\Python314\Lib\asyncio\runners.py", line 204, in run
    return runner.run(main)
           ~~~~~~~~~~^^^^^^
  File "[PYTHON_PATH]\Python\Python314\Lib\asyncio\runners.py", line 127, in run
    return self._loop.run_until_complete(task)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
  File "[PYTHON_PATH]\Python\Python314\Lib\asyncio\base_events.py", line 719, in run_until_complete
    return future.result()
           ~~~~~~~~~~~~~^^
  File "[APP_PATH]\venv\Lib\site-packages\uvicorn\server.py", line 71, in serve
    await self._serve(sockets)
  File "[APP_PATH]\venv\Lib\site-packages\uvicorn\server.py", line 78, in _serve
    config.load()
    ~~~~~~~~~~~^^
  File "[APP_PATH]\venv\Lib\site-packages\uvicorn\config.py", line 439, in load
    self.loaded_app = import_from_string(self.app)
                      ~~~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "[APP_PATH]\venv\Lib\site-packages\uvicorn\importer.py", line 19, in import_from_string
    module = importlib.import_module(module_str)
  File "[PYTHON_PATH]\Python\Python314\Lib\importlib\__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1398, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1342, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 938, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 762, in exec_module
  File "<frozen importlib._bootstrap>", line 491, in _call_with_frames_removed
  File "[APP_PATH]\pois\asgi.py", line 18, in <module>
    from pois.schema import schema
  File "[APP_PATH]\pois\schema.py", line 26, in <module>
    schema = strawberry.Schema(
        query=Queries,
    ...<4 lines>...
        ],
    )
  File "[APP_PATH]\venv\Lib\site-packages\strawberry\schema\schema.py", line 351, in __init__
    raise error.__cause__ from None
  File "[APP_PATH]\venv\Lib\site-packages\graphql\type\definition.py", line 1495, in fields
    fields = resolve_thunk(self._fields)
  File "[APP_PATH]\venv\Lib\site-packages\graphql\type\definition.py", line 318, in resolve_thunk
    return thunk() if callable(thunk) else thunk
           ~~~~~^^
  File "[APP_PATH]\venv\Lib\site-packages\strawberry\schema\schema_converter.py", line 531, in <lambda>
    fields=lambda: self.get_graphql_input_fields(type_definition),
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "[APP_PATH]\venv\Lib\site-packages\strawberry\schema\schema_converter.py", line 488, in get_graphql_input_fields
    return _get_thunk_mapping(
        type_definition=type_definition,
    ...<2 lines>...
        get_fields=self.get_fields,
    )
  File "[APP_PATH]\venv\Lib\site-packages\strawberry\schema\schema_converter.py", line 143, in _get_thunk_mapping
    thunk_mapping[name_converter(field)] = field_converter(
                                           ~~~~~~~~~~~~~~~^
        field,
        ^^^^^^
        type_definition=type_definition,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "[APP_PATH]\venv\Lib\site-packages\strawberry\schema\schema_converter.py", line 453, in from_input_field
    self.from_maybe_optional(
    ~~~~~~~~~~~~~~~~~~~~~~~~^
        field.resolve_type(type_definition=type_definition)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ),
    ^
  File "[APP_PATH]\venv\Lib\site-packages\strawberry\schema\schema_converter.py", line 866, in from_maybe_optional
    return self.from_type(type_.of_type)
           ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "[APP_PATH]\venv\Lib\site-packages\strawberry\schema\schema_converter.py", line 882, in from_type
    return self.from_input_object(type_)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^
  File "[APP_PATH]\venv\Lib\site-packages\strawberry\schema\schema_converter.py", line 503, in from_input_object
    self.validate_same_type_definition(type_name, type_definition, cached_type)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "[APP_PATH]\venv\Lib\site-packages\strawberry\schema\schema_converter.py", line 1040, in validate_same_type_definition
    raise DuplicatedTypeName(first_origin, second_origin, name)
strawberry.exceptions.duplicated_type_name.DuplicatedTypeName: Type StrFilterLookup is defined multiple times in the schema

[bellini666]

Question: Are you using USE_DEPRECATED_FILTERS = True in your settings?

I have a hint that this is caused by mixing old filters with the new ones. Could you confirm? Or, if that's not the case, any way to provide a minimum reproduction?

[MaehMaeh]

What I can say for now is that I don't use USE_DEPRECATED_FILTERS = True.
Actually, I shouldn't be using old filters anymore. I already replaced them some time ago. How would I recognize the old filter?
A minimal example is difficult, as I don't have time for it at the moment.

[truesang]

@bellini666, I don't use deprecated filters. In an attempt to prepare a minimum reproduction, I found the issue and a workaround.

I have a filter class to filter on several derived fields supplied by Django's annotate() in the custom query:

from strawberry_django import DateFilterLookup, FilterLookup

@strawberry_django.filter_type(Req)
class RequestToProcessFilter:
    position: FilterLookup[str] | None
    team_name: FilterLookup[str] | None
    process_by_date: DateFilterLookup[date] | None

In 0.73.1, this results in the exception on FilterLookup. DateFilterLookup works fine. I don't believe this was a documented way; I had to look through the source codes to figure out a way.

I was able to get past the error by using StrFilterLookup:

from strawberry_django import DateFilterLookup
from strawberry_django.fields.filter_types import StrFilterLookup

@strawberry_django.filter_type(Req)
class RequestToProcessFilter:
    position: StrFilterLookup[str] | None
    team_name: StrFilterLookup[str] | None
    process_by_date: DateFilterLookup[date] | None

I don't remember why I chose not to use StrFilterLookup in the first place. I think I had issues getting it to work but it works now. It could also be that because it couldn't be imported directly from strawberry_django.

I'm open for any suggestions to handle this in a better way.

[MaehMaeh]

The problem was that I used strawberry_django.FilterLookup[str] instead of strawberry_django.fields.filter_types.StrFilterLookup[str].

Thanks to @truesang for the tip.

Is there a reason why StrFilterLookup is not defined in strawberry_django? In my opinion, the issue can be marked as completed.

[truesang]

@bellini666 appreciate for the fix!