2012-05-10 33 views
10

ユーザーがいるdjangoプロジェクトを作成しようとしていて、作成した書籍のタイトルを追加できます。しかし、それぞれの時間は、私はこのエラーを取得します(ない管理者ページ上の)書籍のタイトルを入力し割り当てることはできませんインスタンスにする必要があります。 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)) 

答えて

11

もちろんです。ここでの混乱はどこにあるのか分かりません。 Scripter.titleBookへの外部キーです。したがって、文字列ではなく、実際にBookにする必要があります。

5

まず、これはあなたの質問ではありませんが、私はあなたが何かを逃したと信じています。私が正しく理解していれば、Scriptersに複数の本があることを望みます。今、あなたのモデルでは、彼らは1つの本しか持てません。私はあなたが達成しようとしているかのように正確だ場合は、お使いのモデルではなく、次のようになります。

class Book(models.Model): 
    script_title = models.CharField(max_length=100) 
    scripter = models.ForeignKey(Scripter)#A book "remembers" who wrote it 

    def __unicode__(self): 
    return self.script_title 

class Scripter(models.Model): 
    user = models.OneToOneField(User) 
    name = models.CharField(max_length=30) 
    #Scripter can write multiple books, can't he? So the next line is removed, 
    #replaced by an extra line in Book class 

    # title = models.ForeignKey(Book, null=True, blank=True, default=None) 

次に、あなたがこのようなスクリプターの帳簿アクセスします。あなたの質問については

scripter = Scripter.objects.get(name="joshua") 
books = scripter.book_set.all() #all books written by joshua 

を、現在のフォームで、あなたはこのような何かをする必要があります:

book = Book.objects.get(script_title="some_title") 
scripter.title = book 

しかし、私はあなたではなくやってますので、あなたは、あなたのモデル構造を変更する必要が前に言ったように:

scripter = Scripter.objects.get(name="joshua") 
book = Book.objects.Create(script_title="some title",scripter=scripter) 
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