Files
django-stubs/mypy_django_plugin/transformers/settings.py
2019-07-25 19:22:59 +03:00

48 lines
2.1 KiB
Python

from mypy.nodes import MemberExpr, TypeInfo
from mypy.plugin import AttributeContext, FunctionContext
from mypy.types import Instance, Type as MypyType, TypeType
from mypy_django_plugin.django.context import DjangoContext
from mypy_django_plugin.lib import helpers
def get_user_model_hook(ctx: FunctionContext, django_context: DjangoContext) -> MypyType:
auth_user_model = django_context.settings.AUTH_USER_MODEL
model_cls = django_context.apps_registry.get_model(auth_user_model)
model_cls_fullname = helpers.get_class_fullname(model_cls)
model_info = helpers.lookup_fully_qualified_generic(model_cls_fullname,
helpers.get_typechecker_api(ctx).modules)
assert isinstance(model_info, TypeInfo)
return TypeType(Instance(model_info, []))
def get_type_of_settings_attribute(ctx: AttributeContext, django_context: DjangoContext) -> MypyType:
assert isinstance(ctx.context, MemberExpr)
setting_name = ctx.context.name
if not hasattr(django_context.settings, setting_name):
ctx.api.fail(f"'Settings' object has no attribute {setting_name!r}", ctx.context)
return ctx.default_attr_type
typechecker_api = helpers.get_typechecker_api(ctx)
# first look for the setting in the project settings file, then global settings
settings_module = typechecker_api.modules.get(django_context.django_settings_module)
global_settings_module = typechecker_api.modules.get('django.conf.global_settings')
for module in [settings_module, global_settings_module]:
if module is not None:
sym = module.names.get(setting_name)
if sym is not None and sym.type is not None:
return sym.type
# if by any reason it isn't present there, get type from django settings
value = getattr(django_context.settings, setting_name)
value_fullname = helpers.get_class_fullname(value.__class__)
value_info = helpers.lookup_fully_qualified_typeinfo(typechecker_api, value_fullname)
if value_info is None:
return ctx.default_attr_type
return Instance(value_info, [])