我正在开发一个基于django rest框架的django api项目。我有4个模型:
class Module(models.Model):
name = models.CharField(null=False, max_length=50, verbose_name='название')
description = models.TextField(null=False, verbose_name='описание')
image = models.ImageField(null=False, upload_to="image/module", verbose_name='картинка модуля')
first_level = models.ForeignKey('plotbackend.Level', null=False, db_column='first_level_id', on_delete=models.PROTECT, related_name='+', verbose_name='первый уровень')
def __str__(self):
return self.name
class Meta:
db_table = 'module'
verbose_name = "модуль"
verbose_name_plural = 'модули'
class Level(PolymorphicModel):
name = models.CharField(null=True, blank=True, max_length=25, verbose_name="название")
description = models.TextField(null=True, blank=True, verbose_name="описание")
module = models.ForeignKey(Module, null=True, blank=True, verbose_name='модуль', db_column='module_id', on_delete=models.CASCADE, related_name='levels')
next_level = models.ForeignKey('self', null=True, blank=True, verbose_name='следующий уровень', db_column='next_level_id', on_delete=models.SET_NULL)
def __str__(self):
return f'{self.name}'
class Meta:
db_table = 'level'
verbose_name = "уровень"
verbose_name_plural = 'уровни'
class Puzzle(Level):
time = models.PositiveIntegerField(null=False)
class Test(Level):
time = models.IntegerField(null=True, blank=True, verbose_name='время на прохождение теста')
class Meta:
db_table = 'test'
verbose_name = "тест"
verbose_name_plural = "тесты"
和Admin模型:
from django.contrib import admin
from polymorphic.admin import StackedPolymorphicInline, PolymorphicInlineSupportMixin, PolymorphicChildModelAdmin, PolymorphicParentModelAdmin
from .models import *
# Register your models here.
@admin.register(Test)
class TestAdmin(PolymorphicChildModelAdmin):
base_model = Test
@admin.register(Puzzle)
class PuzzleAdmin(PolymorphicChildModelAdmin):
base_model = Puzzle
@admin.register(Level)
class LevelAdmin(PolymorphicParentModelAdmin):
base_model = Level
child_models = (Test, Puzzle, )
class LevelInline(StackedPolymorphicInline):
class TestInline(StackedPolymorphicInline.Child):
model = Test
class PuzzleInline(StackedPolymorphicInline.Child):
model = Puzzle
model = Level
child_inlines = (
TestInline,
PuzzleInline,
)
@admin.register(Module)
class ModuleAdmin(admin.ModelAdmin, PolymorphicInlineSupportMixin):
inlines = (LevelInline,)
PolymorphicModelAdmin对我来说很好，但StackedPolymorphicInline抛出这个异常。回溯
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/admin/plotbackend/module/1/change/
Django Version: 4.0.5
Python Version: 3.9.7
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'plotbackend.apps.PlotbackendConfig',
'rest_framework',
'polymorphic']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Traceback (most recent call last):
File "D:PyCharm Projectsplotlibsite-packagesdjangocorehandlersexception.py", line 55, in inner
response = get_response(request)
File "D:PyCharm Projectsplotlibsite-packagesdjangocorehandlersbase.py", line 197, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "D:PyCharm Projectsplotlibsite-packagesdjangocontribadminoptions.py", line 683, in wrapper
return self.admin_site.admin_view(view)(*args, **kwargs)
File "D:PyCharm Projectsplotlibsite-packagesdjangoutilsdecorators.py", line 133, in _wrapped_view
response = view_func(request, *args, **kwargs)
File "D:PyCharm Projectsplotlibsite-packagesdjangoviewsdecoratorscache.py", line 62, in _wrapped_view_func
response = view_func(request, *args, **kwargs)
File "D:PyCharm Projectsplotlibsite-packagesdjangocontribadminsites.py", line 242, in inner
return view(request, *args, **kwargs)
File "D:PyCharm Projectsplotlibsite-packagesdjangocontribadminoptions.py", line 1888, in change_view
return self.changeform_view(request, object_id, form_url, extra_context)
File "D:PyCharm Projectsplotlibsite-packagesdjangoutilsdecorators.py", line 46, in _wrapper
return bound_method(*args, **kwargs)
File "D:PyCharm Projectsplotlibsite-packagesdjangoutilsdecorators.py", line 133, in _wrapped_view
response = view_func(request, *args, **kwargs)
File "D:PyCharm Projectsplotlibsite-packagesdjangocontribadminoptions.py", line 1745, in changeform_view
return self._changeform_view(request, object_id, form_url, extra_context)
File "D:PyCharm Projectsplotlibsite-packagesdjangocontribadminoptions.py", line 1843, in _changeform_view
media = media + inline_formset.media
File "D:PyCharm Projectsplotlibsite-packagesdjangocontribadminhelpers.py", line 443, in media
for fs in self:
File "D:PyCharm Projectsplotlibsite-packagesdjangocontribadminhelpers.py", line 366, in __iter__
self.formset.empty_form,
File "D:PyCharm Projectsplotlibsite-packagespolymorphicformsetsmodels.py", line 292, in empty_form
raise RuntimeError(
Exception Type: RuntimeError at /admin/plotbackend/module/1/change/
Exception Value: 'empty_form' is not used in polymorphic formsets, use 'empty_forms' instead.
如果我评论内联在ModuleAdmin项目工作没有任何异常。我试图在网上找到解决这个问题的方法，但一无所获。如何解决这个问题?
我自己解决了这个问题。
我刚从 更改了modulleadmin@admin.register(Module)
class ModuleAdmin(admin.ModelAdmin, PolymorphicInlineSupportMixin):
inlines = (LevelInline,)
@admin.register(Module)
class ModuleAdmin(PolymorphicInlineSupportMixin, admin.ModelAdmin):
inlines = (LevelInline,)
也就是说，我只是改变了继承的顺序