blocks|key|1303197|text|通常的做法是使用中间件将请求对象存储在线程本地引用中。然后，您可以从应用程序中的任何位置访问它，包括Form.clean()方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1303198|更改Form.clean()方法的签名意味着您拥有了修改后的Django版本，这可能不是您想要的。|1303199|感谢中间件计数看起来像这样：|1303200|import+threading
_thread_locals+=+threading.local()

def+get_current_request():
++++return+getattr(_thread_locals,+'request',+None)

class+ThreadLocals(object):
++++"""
++++Middleware+that+gets+various+objects+from+the
++++request+object+and+saves+them+in+thread+local+storage.
++++"""
++++def+process_request(self,+request):
++++++++_thread_locals.request+=+request|code-block|syntax|javascript|1303201|按照Django+docs中的说明注册此中间件|offset|length|1303202|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.djangoproject.com/en/dev/topics/http/middleware/^0|0|0|0|0|2|B|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|9|@$M|11|N|12|1|13]]|A|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

The usual aproach is to store the request object in a thread-local reference using a middleware. Then you can access this from anywhere in you app, including the Form.clean() method.

Changing the signature of the Form.clean() method means you have you own, modified version of Django, which may not be what you want.

Thank middleware count look something like this:

<pre><code>import threading
_thread_locals = threading.local()

def get_current_request():
 return getattr(_thread_locals, 'request', None)

class ThreadLocals(object):
 """
 Middleware that gets various objects from the
 request object and saves them in thread local storage.
 """
 def process_request(self, request):
 _thread_locals.request = request
</code></pre>

Register this middleware as described in the <a href="http://docs.djangoproject.com/en/dev/topics/http/middleware/" rel="noreferrer">Django docs</a>

blocks|key|1518302|text|您不能总是使用此方法(这可能是不好的做法)，但如果您仅在一个视图中使用表单，则可以将其范围限定在view方法本身内。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1518303|def+my_view(request):

++++class+ResetForm(forms.Form):
++++++++password+=+forms.CharField(required=True,+widget=forms.PasswordInput())

++++++++def+clean_password(self):
++++++++++++data+=+self.cleaned_data['password']
++++++++++++if+not+request.user.check_password(data):
++++++++++++++++raise+forms.ValidationError("The+password+entered+does+not+match+your+account+password.")
++++++++++++return+data

++++if+request.method+==+'POST':
++++++++form+=+ResetForm(request.POST,+request.FILES)
++++++++if+form.is_valid():

++++++++++++return+HttpResponseRedirect("/")
++++else:
++++++++form+=+ResetForm()

++++return+render_to_response(request,+"reset.html")|code-block|syntax|javascript|1518304|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can't always use this method (and its probably bad practice), but if you are only using the form in one view you could scope it inside the view method itself.

<pre><code>def my_view(request):

 class ResetForm(forms.Form):
 password = forms.CharField(required=True, widget=forms.PasswordInput())

 def clean_password(self):
 data = self.cleaned_data['password']
 if not request.user.check_password(data):
 raise forms.ValidationError("The password entered does not match your account password.")
 return data

 if request.method == 'POST':
 form = ResetForm(request.POST, request.FILES)
 if form.is_valid():

 return HttpResponseRedirect("/")
 else:
 form = ResetForm()

 return render_to_response(request, "reset.html")
</code></pre>

blocks|key|1518346|text|我在自定义管理员时遇到了这个特殊的问题。我希望根据特定管理员的凭据来验证某个字段。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1518347|由于我不想修改视图以将请求作为参数传递给表单，下面是我所做的：|1518348|class+MyCustomForm(forms.ModelForm):
++++class+Meta:
++++++++model+=+MyModel

++++def+clean(self):
++++++++#+make+use+of+self.request+here

class+MyModelAdmin(admin.ModelAdmin):
++++form+=+MyCustomForm
++++def+get_form(self,+request,+obj=None,+**kwargs):
++++++++ModelForm+=+super(MyModelAdmin,+self).get_form(request,+obj=obj,+**kwargs)
++++++++def+form_wrapper(*args,+**kwargs):
++++++++++++a+=+ModelForm(*args,+**kwargs)
++++++++++++a.request+=+request
++++++++++++return+a
++++return+form_wrapper|code-block|syntax|javascript|1518349|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I ran into this particular problem when customizing the admin. I wanted a certain field to be validated based on the particular admin's credentials.

Since I did not want to modify the view to pass the request as an argument to the form, the following is what I did:

<pre><code>class MyCustomForm(forms.ModelForm):
 class Meta:
 model = MyModel

 def clean(self):
 # make use of self.request here

class MyModelAdmin(admin.ModelAdmin):
 form = MyCustomForm
 def get_form(self, request, obj=None, **kwargs):
 ModelForm = super(MyModelAdmin, self).get_form(request, obj=obj, **kwargs)
 def form_wrapper(*args, **kwargs):
 a = ModelForm(*args, **kwargs)
 a.request = request
 return a
 return form_wrapper
</code></pre>

blocks|key|1518367|text|来自cheesebaker@pypi的新鲜奶酪：django-requestprovider|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1518368|entityMap|0|LINK|mutability|MUTABLE|url|http://pypi.python.org/pypi?%253aaction=display&name=django-contrib-requestprovider&version=1.0.1^0|O|M|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

fresh cheese from cheesebaker@pypi: <a href="http://pypi.python.org/pypi?%3aaction=display&amp;name=django-contrib-requestprovider&amp;version=1.0.1" rel="nofollow">django-requestprovider</a>

blocks|key|1303399|text|我对这个问题有另一个答案，根据您的要求，您希望将用户访问到表单的clean方法中。你可以试试这个。View.py|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1303400|person=User.objects.get(id=person_id)
form=MyForm(request.POST,instance=person)|code-block|syntax|javascript|1303401|forms.py|1303402|def+__init__(self,*arg,**kwargs):
++++self.instance=kwargs.get('instance',None)
++++if+kwargs['instance']+is+not+None:
++++++++del+kwargs['instance']
++++super(Myform,+self).__init__(*args,+**kwargs)|1303403|现在，您可以在form.py中以任何干净的方法访问self.instance|1303404|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I have another answer to this question as per your requirement you want to access the user into the clean method of the form.
You can Try this.
View.py

<pre><code>person=User.objects.get(id=person_id)
form=MyForm(request.POST,instance=person)
</code></pre>

forms.py

<pre><code>def __init__(self,*arg,**kwargs):
 self.instance=kwargs.get('instance',None)
 if kwargs['instance'] is not None:
 del kwargs['instance']
 super(Myform, self).__init__(*args, **kwargs)
</code></pre>

Now you can access the self.instance in any clean method in form.py

blocks|key|1518447|text|对于Django管理员，在Django+1.8中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1518448|class+MyModelAdmin(admin.ModelAdmin):
++++...
++++form+=+RedirectForm

++++def+get_form(self,+request,+obj=None,+**kwargs):
++++++++form+=+super(MyModelAdmin,+self).get_form(request,+obj=obj,+**kwargs)
++++++++form.request+=+request
++++++++return+form|code-block|syntax|javascript|1518449|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For Django admin, in Django 1.8

<pre><code>class MyModelAdmin(admin.ModelAdmin):
 ...
 form = RedirectForm

 def get_form(self, request, obj=None, **kwargs):
 form = super(MyModelAdmin, self).get_form(request, obj=obj, **kwargs)
 form.request = request
 return form
</code></pre>

blocks|key|1303482|text|当你想通过像CreateView这样的“准备好的”Django类视图访问它时，有一个小窍门需要知道(=官方的解决方案不能开箱即用)。在您自己的CreateView中，您必须添加如下代码：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1303483|class+MyCreateView(LoginRequiredMixin,+CreateView):
++++form_class+=+MyOwnForm
++++template_name+=+'my_sample_create.html'

++++def+get_form_kwargs(self):
++++++++result+=+super().get_form_kwargs()
++++++++result['request']+=+self.request
++++++++return+result|code-block|syntax|javascript|1303484|简而言之，这就是通过Django的创建/更新视图将request传递给表单的解决方案。|1303485|entityMap^0|6|A|1Z|A|0|0|P|7|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

When you want to access it through "prepared" Django class views like <code>CreateView</code> there's a small trick to know (= the official solution doesn't work out of the box). In your own <code>CreateView</code> you'll have to add code like this: 

<pre><code>class MyCreateView(LoginRequiredMixin, CreateView):
 form_class = MyOwnForm
 template_name = 'my_sample_create.html'

 def get_form_kwargs(self):
 result = super().get_form_kwargs()
 result['request'] = self.request
 return result
</code></pre>

= in short this is the solution to pass <code>request</code> to your form with Django's Create/Update views.

I am trying to request.user for a form's clean method, but how can I access the request object? Can I modify the clean method to allow variables input?

How do I access the request object or any other variable in a form's clean() method?

对象存储

中间件

Django

我正在尝试请求一个表单的干净方法，但是我怎样才能访问request.user对象呢？我可以修改clean方法来允许变量输入吗？

问如何访问请求对象或窗体的clean()方法中的任何其他变量？
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