Django必须是“用户”实例

Question

我得到必须是用户实例错误消息。

TRACEBACK

Traceback: 
File "/Library/Python/2.6/site-packages/django/core/handlers/base.py" in get_response 
    92.     response = callback(request, *callback_args, **callback_kwargs) 
File "/Users/ApPeL/Sites/Django/omu2/../omu2/friends/views.py" in add 
    13.   if form.is_valid(): 
File "/Library/Python/2.6/site-packages/django/forms/forms.py" in is_valid 
    120.   return self.is_bound and not bool(self.errors) 
File "/Library/Python/2.6/site-packages/django/forms/forms.py" in _get_errors 
    111.    self.full_clean() 
File "/Library/Python/2.6/site-packages/django/forms/forms.py" in full_clean 
    234.    value = field.widget.value_from_datadict(self.data, self.files, self.add_prefix(name)) 
File "/Library/Python/2.6/site-packages/django/forms/widgets.py" in value_from_datadict 
    170.   return data.get(name, None) 

Exception Type: AttributeError at /friends/add/ 
Exception Value: 'User' object has no attribute 'get' 

views.py

from friends.forms import InviteFriendForm, UserForm 
from django.shortcuts import render_to_response 
from django.template import RequestContext 
from django.http import Http404, HttpResponseRedirect 
from django.contrib.auth.models import User 

def add(request, template_name='friends/add.html'): 
    if request.method == 'POST': 
     from_user = request.user 
     user = request.user 

     form = InviteFriendForm(UserForm, from_user, user) 
     if form.is_valid(): 
      form.save() 
      return HttpResponseRedirect('/') 

    else: 
     form = InviteFriendForm(UserForm) 

    context = { 'form':form, } 

    return render_to_response(template_name, context, 
     context_instance=RequestContext(request)) 

forms.py

class UserForm(forms.Form): 

    def __init__(self, user=None, *args, **kwargs): 
     self.user = user 
     super(UserForm, self).__init__(*args, **kwargs) 


if EmailAddress: 
    class JoinRequestForm(forms.Form): 

     email = forms.EmailField(label="Email", required=True, widget=forms.TextInput(attrs={'size':'30'})) 
     message = forms.CharField(label="Message", required=False, widget=forms.Textarea(attrs = {'cols': '30', 'rows': '5'})) 

     def clean_email(self): 
      # @@@ this assumes email-confirmation is being used 
      self.existing_users = EmailAddress.objects.get_users_for(self.cleaned_data["email"]) 
      if self.existing_users: 
       raise forms.ValidationError(u"Someone with that email address is already here.") 
      return self.cleaned_data["email"] 

     def save(self, user): 
      join_request = JoinInvitation.objects.send_invitation(user, self.cleaned_data["email"], self.cleaned_data["message"]) 
      user.message_set.create(message="Invitation to join sent to %s" % join_request.contact.email) 
      return join_request 


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}) 
     self.user.message_set.create(message="Friendship requested with %s" % to_user.username) # @@@ make link like notification 
     return invitation 

Answer 1

请试试这个

def add(request, user_id,template_name='friends/add.html'): 
    if request.method == 'POST': 
     user = get_object_or_404(User, pk=user_id) 

     form = InviteFriendForm(request.user, request.POST) 
     if form.is_valid(): 
      form.save() 
      return HttpResponseRedirect('/') 

    else: 
     form = InviteFriendForm() 

    context = { 'form':form, } 

    return render_to_response(template_name, 
context, 
context_instance=RequestContext(request))text_instance=RequestContext(request)) 

request.user是发送者。发件人在表格中打电话。你不需要声明来自。

Answer 2

在您的来电：

form = InviteFriendForm(UserForm, from_user, user) 

首先，UserForm参数是错误的 - 第一个参数预计是发布数据（request.POST）。

二，您的InviteFriendForm类没有定义构造函数（__init__方法）。所以参数不会传递给父类UserForm。定义一个__init__方法或使用关键字参数，例如user=from_user。