我的一个表格给了我这个错误，我似乎不知道问题出在哪里。在11:24:04 web.1 | Internal Server Error: /dash/location/add

11:24:04 web.1 | Traceback (most recent call last):

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/core/handlers/base.py", line 114, in get_response

11:24:04 web.1 | response = wrapped_callback(request, *callback_args, **callback_kwargs)

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/contrib/auth/decorators.py", line 22, in _wrapped_view

11:24:04 web.1 | return view_func(request, *args, **kwargs)

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/views/generic/base.py", line 69, in view

11:24:04 web.1 | return self.dispatch(request, *args, **kwargs)

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/views/generic/base.py", line 87, in dispatch

11:24:04 web.1 | return handler(request, *args, **kwargs)

11:24:04 web.1 | File "/Users/nir/dashboard/pinpoint/apps/locationmanager/views.py", line 43, in post

11:24:04 web.1 | if form.is_valid():

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/forms/forms.py", line 129, in is_valid

11:24:04 web.1 | return self.is_bound and not bool(self.errors)

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/forms/forms.py", line 121, in errors

11:24:04 web.1 | self.full_clean()

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/forms/forms.py", line 273, in full_clean

11:24:04 web.1 | self._clean_fields()

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/forms/forms.py", line 288, in _clean_fields

11:24:04 web.1 | value = field.clean(value)

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/forms/fields.py", line 148, in clean

11:24:04 web.1 | value = self.to_python(value)

11:24:04 web.1 | File "/Library/Python/2.7/site-packages/django/forms/models.py", line 1136, in to_python

11:24:04 web.1 | except (ValueError, self.queryset.model.DoesNotExist):

11:24:04 web.1 | AttributeError: 'NoneType' object has no attribute 'model'

以下是发生错误的视图：

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特别是在试图验证if form.is_valid():时，问题似乎发生了

如果需要，我可以发布更多信息，但我真的不知道这个错误是什么意思。有人能解释一下吗？在

编辑：

这是表格本身from django import forms

class locationForm(forms.Form):

region_name = forms.ModelChoiceField(queryset=None, label="Region Name")

location_name = forms.CharField()

street_address = forms.CharField()

city = forms.CharField()

zip_code = forms.CharField()