标签：python django django-models django-views django-forms
我的一个表格是给我这个错误,我似乎无法弄清楚问题是什么.
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'
这是在以下情况中发生错误的视图：
class AddLocation(View):
template_name = "dash/Addlocation.html"
form = locationForm()
def get(self, request, *args, **kwargs):
user = User.objects.get(username=request.user.username)
self.form.fields['region_name'].queryset = Region.objects.filter(location__manager=user)
return render(request, self.template_name, {'form': self.form})
def post(self, request, *args, **kwargs):
form = locationForm(request.POST)
if form.is_valid():
region_obj, _created = Region.objects.get_or_create(name=form.cleaned_data['region_name'])
form.cleaned_data['region_name'] = region_obj
user = User.objects.get(username=request.user.username)
location = Location(
region_obj,
user,name = form.cleaned_data['name'],
street_address = form.cleaned_data['street_address'],
city = form.cleaned_data['city'],
zip_code = form.cleaned_data['zip_code']
)
location.save()
return redirect(reverse('location_manager'))
else:
form = locationForm(request.POST)
return render(request, self.template_name, {'form': form})
特别是在尝试验证form.is_valid()时是否出现了问题：
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.有人可以对此有所了解吗？
编辑：
这是形式本身
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()
解决方法:
您已明确将region_name的查询集定义为None.那是无效的：你需要一个查询集.您可以在视图的get方法中正确分配查询集,但不能在帖子中分配,因此当在post上验证表单时,它会失败.
您应该在调用super之后覆盖表单的__init__方法并在其中分配查询集,而不是在视图中执行此操作.
标签：python,django,django-models,django-views,django-forms 来源： https://codeday.me/bug/20190825/1714108.html
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。