UserProfile.location“必须是”位置“实例

Question

我在理解表单和模型表单之间的关系时仍遇到一些问题。 我收到一个错误： UserProfile.location”必须是“位置”实例。

我已经在models.py中将模型中的位置设置为blank = True，null = True并且required = False。 我现在不知道该怎么做。

我该如何解决这个问题？

from django.db import models 
from django.contrib.auth.models import User 

class Location(models.Model): 
    location = models.CharField(max_length=32) 
    #county = models.CharField(max_length=32) 
    #province = models.CharField(max_length=32) 

class UserProfile(models.Model): 
    user = models.OneToOneField(User, unique=True, primary_key=True) 
    location = models.ForeignKey("Location", null=True, blank=True) 

    website = models.URLField("Site", null=True, blank=True) 
    accepted_rules = models.BooleanField(default=False) 
    accepted_rules_date = models.DateTimeField(auto_now_add=True) 

    #points_count = models.IntegerField(default=0, null=True, blank=True) 
    #posts_count = models.IntegerField(default=0, null=True, blank=True) 
    #comments_count = models.IntegerField(default=0, null=True, blank=True) 

形式：

from django import forms 
from django.forms import Form 
from django.forms.models import ModelForm 
from accounts.models import UserProfile, Location 
from django.contrib.auth.models import User 


class UserCreationForm(forms.Form): 

    username = forms.CharField(max_length=32) 
    password = forms.CharField(widget=forms.PasswordInput()) 
    email = forms.EmailField() 
    #password_repeat = forms.CharField(widget=forms.PasswordInput(render_value=False)) 

    def clean_username(self): 

     try: 
      # iexact = case-insensitive match/important for validation 
      User.objects.get(username__iexact=self.cleaned_data['username']) 
      print "User does already exist" 
    except User.DoesNotExist: 
     return self.cleaned_data['username'] 
    else: 
     raise forms.ValidationError("User already exists") 



def clean_email(self): 

    if User.objects.filter(email__iexact=self.cleaned_data['email']): 
     print u'Adres email jest już używany.' 
     raise forms.ValidationError('Adres email jest już używany.') 
    else: 
     return self.cleaned_data['email'] 

def save(self): 
    user = User.objects.create(username = self.cleaned_data['username'], email = self.cleaned_data['email'],) 

    user.set_password(self.cleaned_data['password']) 
    return user 


class UserProfileForm(ModelForm): 
    website = forms.URLField(label="website", required=False) 
    location = forms.ChoiceField(required=False) 

    class Meta: 
     model = UserProfile 
     include = ['website', 'location'] 
     exclude = ('user', 'type', 'accepted_rules') 

查看

contrib.auth.models import User 
from django.template.response import TemplateResponse 
from django.views.decorators.csrf import csrf_protect 
from django.core.context_processors import csrf 
from django.forms.models import inlineformset_factory 
from django.http import HttpResponseRedirect 

from accounts.forms import UserCreationForm, UserProfileForm 



def index(request): 
    return TemplateResponse(request, "base.html") 

@csrf_protect 
def register(request): 
    form = UserCreationForm() 
    user_profile = UserProfileForm() 

    if request.method == "POST": 

     form = UserCreationForm(prefix='user', data=request.POST or None) 
     user_profile = UserProfileForm(prefix='profile', data= request.POST or None) 

     if form.is_valid() and user_profile.is_valid(): 
      user = form.save() 
      profile = user_profile.save(commit=False) 
      profile.user = user 
      profile.save() 


      return HttpResponseRedirect("/") 

    return TemplateResponse(request, 'accounts/register.html', { 
          'form':form, 
          'user_profile':user_profile , 
          } 
          ) 

Answer 1

的问题是在这里。

class UserProfileForm(ModelForm): 
    website = forms.URLField(label="website", required=False) 
    location = forms.ChoiceField(required=False) 

    class Meta: 
     model = UserProfile 
     include = ['website', 'location'] 
     exclude = ('user', 'type', 'accepted_rules') 

ModelForm将为您的表单生成所需的字段。你不需要手动定义它们。所以你应该使用这样的东西。

class UserProfileForm(ModelForm): 
    class Meta: 
     model = UserProfile 
     include = ['website', 'location'] 
     exclude = ('user', 'type', 'accepted_rules') 

另一件事。没有include选项，我想你想用fields。但是，您不必同时使用fields和exclude，通常您需要使用其中一个。在你的情况下，exclude就足够了。最终结果：

class UserProfileForm(ModelForm): 
    class Meta: 
     model = UserProfile 
     exclude = ('user', 'type', 'accepted_rules')