Django中的消息(从1.2更新到1.4)

Question

我最近从1.2更新到Django 1.4.

在转换过程中,不推荐使用set_messages,现在消息API已更改为add_message.基于此页面,我应该使用以下格式:

messages.add_message(request, messages.INFO, 'Hello world.')

但是,我收到了错误global name 'request' is not defined.谁知道为什么？

这是我的代码(以粗体显示问题的行)

class InviteFriendForm(UserForm):

to_user = forms.CharField(widget=forms.HiddenInput)
message = forms.CharField(label="Message", required=False, widget=forms.Textarea(attrs = {'cols': '20', 'rows': '5'}))

    def clean_to_user(self):
        to_username = self.cleaned_data["to_user"]
        try:
            User.objects.get(username=to_username)
        except User.DoesNotExist:
            raise forms.ValidationError(u"Unknown user.")

        return self.cleaned_data["to_user"]

    def clean(self):
        to_user = User.objects.get(username=self.cleaned_data["to_user"])
        previous_invitations_to = FriendshipInvitation.objects.invitations(to_user=to_user, from_user=self.user)
        if previous_invitations_to.count() > 0:
            raise forms.ValidationError(u"Already requested friendship with %s" % to_user.username)
        # check inverse
        previous_invitations_from = FriendshipInvitation.objects.invitations(to_user=self.user, from_user=to_user)
        if previous_invitations_from.count() > 0:
            raise forms.ValidationError(u"%s has already requested friendship with you" % to_user.username)
        return self.cleaned_data

    def save(self):
        to_user = User.objects.get(username=self.cleaned_data["to_user"])
        message = self.cleaned_data["message"]
        invitation = FriendshipInvitation(from_user=self.user, to_user=to_user, message=message, status="2")
        invitation.save()
        if notification:
            notification.send([to_user], "friends_invite", {"invitation": invitation})
            notification.send([self.user], "friends_invite_sent", {"invitation": invitation})
            **messages.add_message(request, messages.SUCCESS, "Friendship requested with %s" % to_user.username)**
        return invitation

追溯:

Traceback:
File "/Users/nb/Desktop/myenv2/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/Users/nb/Desktop/nutstore/apps/profiles/views.py" in profile
  125.                     invite_form.save()
File "/Users/nb/Desktop/nutstore/apps/friends/forms.py" in save
  81.             messages.add_message(request, messages.SUCCESS, "Friendship requested with %s" % to_user.username)

Exception Type: NameError at /profiles/profile/test/
Exception Value: global name 'request' is not defined

Answer 1

Django表单无权访问当前请求.这是减少组件之间耦合的有意设计决策,但是以便利为代价.

因此,您得到一个NameError因为范围中没有请求变量.如果你想在内部使用请求save(),你需要在某个时候传递它,例如

class InviteFriendForm(forms.Form):
    def save(self, request):
        # ...

# view
form.save(request)