I am using forms.ModelChoiceField to have the choice loaded from a specific model entries:
我正在使用forms.ModelChoiceField来从特定的模型条目加载选项：
from order.models import Region
class CheckoutForm(forms.Form):
area = forms.ModelChoiceField(queryset=Region.objects.all(),label=("Area"))
The problem I am facing is that when importing the class name from the app. I get the error:
我面临的问题是从应用程序导入类名时。我收到错误：
ImportError: cannot import name Region
ImportError：无法导入名称Region
Please not that from order.models import Region is working when testing it independently in the shell.
请不要从order.models导入区域在shell中独立测试时工作。
Any Idea what is causing so?
是什么原因引起的？
Traceback (most recent call last):
File "/home/salma/venv/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 92, in inner_run
self.validate(display_num_errors=True)
File "/home/salma/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 280, in validate
num_errors = get_validation_errors(s, app)
File "/home/salma/venv/local/lib/python2.7/site-packages/django/core/management/validation.py", line 35, in get_validation_errors
for (app_name, error) in get_app_errors().items():
File "/home/salma/venv/local/lib/python2.7/site-packages/django/db/models/loading.py", line 166, in get_app_errors
self._populate()
File "/home/salma/venv/local/lib/python2.7/site-packages/django/db/models/loading.py", line 75, in _populate
self.load_app(app_name)
File "/home/salma/venv/local/lib/python2.7/site-packages/django/db/models/loading.py", line 96, in load_app
models = import_module('.models', app_name)
File "/home/salma/venv/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
__import__(name)
File "/home/salma/Projects/Morabiz/Saludable/saludable_django/landing/models.py", line 2, in <module>
from order.models import Dish
File "/home/salma/Projects/Morabiz/Saludable/saludable_django/order/models.py", line 4, in <module>
from order.forms import RegistrationFormNoUserName
File "/home/salma/Projects/Morabiz/Saludable/saludable_django/order/forms.py", line 7, in <module>
from order.models import Region
ImportError: cannot import name Region
1 个解决方案
#1
12
As I mentioned in the comments, you have a circular dependency between your forms and models files. You'll either need to refactor to remove the circularity, or if you really can't do that you'll have to move one of the imports into the function where it's used.
正如我在评论中提到的，表单和模型文件之间存在循环依赖关系。你要么需要重构来删除循环，要么你真的不能这样做，你必须将其中一个导入移动到使用它的函数中。
#1
12
As I mentioned in the comments, you have a circular dependency between your forms and models files. You'll either need to refactor to remove the circularity, or if you really can't do that you'll have to move one of the imports into the function where it's used.
正如我在评论中提到的，表单和模型文件之间存在循环依赖关系。你要么需要重构来删除循环，要么你真的不能这样做，你必须将其中一个导入移动到使用它的函数中。