django，mypy：查詢集，選擇。 錯誤：不兼容的類型

Question

我們有：

在模型.py

class Language(models.IntegerChoices):
    en = 1
    ru = 2

class Translation(models.Model):
    language_id = models.PositiveIntegerField(choices=Language.choices)
    mnemonic = models.CharField(max_length=255)
    translation = models.CharField(max_length=255)

1. 在 serializers.py 中

    66    def get_translations(self, obj):
    67        language: int = self.initial_data.get('language') or settings.SERVER['current_language_id']
    68        common_public = Translation.objects.filter(language_id=language).exclude(mnemonic__startswith='dictionary')

當我通過 mypy 檢查它時：

resources/serializers.py:67：錯誤：賦值中的類型不兼容（表達式的類型為“Union [Any, object]”，變量的類型為“int”）

2. 如果在 serializers.py

    66    def get_translations(self, obj):
    67        language: Union[Any, object] = self.initial_data.get('language') or settings.SERVER['current_language_id']
    68        common_public = Translation.objects.filter(language_id=language).exclude(mnemonic__startswith='dictionary')

通過 mypy 檢查它：

資源/serializers.py:68：錯誤：查找'language_id'的類型不兼容：（得到“Union [Any，object]”，預期“Union [str，int]”）

3)

66    def get_translations(self, obj):
67        language: Union[str, int] = self.initial_data.get('language') or settings.SERVER['current_language_id']
68        common_public = Translation.objects.filter(language_id=language).exclude(mnemonic__startswith='dictionary')

核實：

resources/serializers.py:67：錯誤：賦值中的類型不兼容（表達式的類型為“Union[Any, object]”，變量的類型為“Union[str, int]”）

怎么了？

mypy.ini：

[mypy]
python_version = 3.8
mypy_path = ./stubs

check_untyped_defs = True
disallow_any_generics = True
disallow_untyped_calls = True
disallow_untyped_decorators = True
ignore_errors = False
ignore_missing_imports = True
implicit_reexport = False
strict_optional = True
strict_equality = True
no_implicit_optional = True
warn_unused_ignores = True
warn_redundant_casts = True
warn_unused_configs = True
warn_unreachable = True
warn_no_return = True
plugins = mypy_django_plugin.main

[mypy.plugins.django-stubs]
django_settings_module = server.settings

[mypy-*.migrations.*]
ignore_errors = True

Answer 1

錯誤在settings.SERVER['current_language_id']

正確的路：

getattr(settings.SERVER, 'current_language_id')

現在 mypy 沒事過去了