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我一直试图创建一个有用户的django项目，这些用户可以添加他们创建的书籍的标题。但每次我进入一个书名（而不是管理页面上）我得到这个错误无法指定必须是实例。 Django
Cannot assign "u'Hello Wold'": "Scripter.title" must be a "Book" instance.
models.py
from django.db import models
from django.contrib.auth.models import User
class Book(models.Model):
script_title = models.CharField(max_length=100)
def __unicode__(self):
return self.script_title
class Scripter(models.Model):
user = models.OneToOneField(User)
name = models.CharField(max_length=30)
title = models.ForeignKey(Book, null=True, blank=True, default=None)
def __unicode__(self):
return self.name
forms.py
from django import forms
from django.contrib.auth.models import User
from django.forms import ModelForm
from scripters.models import Scripter#, Book
class RegistrationForm(ModelForm):
username = forms.CharField(label=(u'User Name'))
email = forms.EmailField(label=(u'Email Address'))
password = forms.CharField(label=(u'Password'), widget=forms.PasswordInput(render_value=False))
password1 = forms.CharField(label=(u'Verify Password'), widget=forms.PasswordInput(render_value=False))
class Meta:
model = Scripter
exclude = ('user','title')
def clean_username(self):
username = self.cleaned_data['username']
try:
User.objects.get(username=username)
except User.DoesNotExist:
return username
raise forms.ValidationError("User Name has been taken!")
def clean(self):
if self.cleaned_data['password'] != self.cleaned_data['password1']:
raise forms.ValidationError("The passwords did not match")
else:
return self.cleaned_data
class LoginForm(forms.Form):
username = forms.CharField(label=(u'Username'))
password = forms.CharField(label=(u'Password'), widget=forms.PasswordInput(render_value=False))
class CreateScript(ModelForm):
title = forms.CharField(label=(u'Script Title'))
class Meta:
model = Scripter
exclude = ('user','name',)
def clean_title(self):
title = self.cleaned_data['title']
return title
views.py
from django.http import HttpResponseRedirect
from django.contrib.auth.models import User
from django.contrib.auth.decorators import login_required
from django.shortcuts import render_to_response
from django.template import RequestContext
from scripters.forms import RegistrationForm, LoginForm, CreateScript
from scripters.models import Scripter, Book
from django.contrib.auth import authenticate, login, logout
def ScripterRegistration(request):
if request.user.is_authenticated():
return HttpResponseRedirect('/profile/')
if request.method =='POST':
form = RegistrationForm(request.POST)
if form.is_valid():
user = User.objects.create_user(username=form.cleaned_data['username'],
email = form.cleaned_data['email'],
password = form.cleaned_data['password']
)
user.save()
scripter = Scripter(user=user, name=form.cleaned_data['name'])
scripter.save()
return HttpResponseRedirect('/profile/')
else:
return render_to_response('index.html', {'form': form}, context_instance=RequestContext(request))
else:
form = RegistrationForm()
context = {'form': form}
return render_to_response('index.html', context, context_instance=RequestContext(request))
@login_required
def Profile(request):
if not request.user.is_authenticated():
return HttpResponseRedirect('/login/')
Scripter = request.user.get_profile()
context = {'Scripter': Scripter, 'Book': Book}
return render_to_response('profile.html', context, context_instance=RequestContext(request))
def LoginRequest(request):
if request.user.is_authenticated():
return HttpResponseRedirect('/profile/')
if request.method == 'POST':
submit = LoginForm(request.POST)
if submit.is_valid():
username = submit.cleaned_data['username']
password = submit.cleaned_data['password']
scripter = authenticate(username=username, password=password)
if scripter is not None:
login(request, scripter)
return HttpResponseRedirect('/profile/')
else:
return HttpResponseRedirect('/login/')
else:
submit = LoginForm()
context = {'submit': submit}
return render_to_response('login.html',context, context_instance=RequestContext(request))
def LogoutRequest(request):
logout(request)
return HttpResponseRedirect('/login/')
@login_required
def NewScript(request):
if not request.user.is_authenticated():
return HttpResponseRedirect('/login/')
if request.method =='POST':
title_form = CreateScript(request.POST)
if title_form.is_valid():
new_script = Book.objects.get_or_create(
script_title = title_form.cleaned_data['title']
)
new_script.save()
script = Book(script_title=title_form.cleaned_data['title'])
script.save()
return HttpResponseRedirect('/edit/')
else:
return render_to_response('NewScript.html', {'title_form': title_form}, context_instance=RequestContext(request))
else:
title_form = CreateScript()
context = {'title_form': title_form}
return render_to_response('NewScript.html', context, context_instance=RequestContext(request))