如何使用 CreateView 将用户对象传递给模型窗体

Question

NOT NULL 约束失败：blog_post.author_id

您好，我是 django 的新手，无法修复此错误。

我正在构建一个博客应用程序，我希望作者是当前用户。
我知道我没有正确地将用户对象传递给表单，但是 none 我找到的解决方案对我有用。

提前致谢！

models.py

class User(auth.models.User,auth.models.PermissionsMixin):
    def __str__(self):
        return '@{}'.format(self.username)


class Post(models.Model):
    author = models.OneToOneField(User, on_delete=models.CASCADE)
    title = models.CharField(max_length=200)
    text = models.TextField()

def get_absolute_url(self):
    return reverse('post_detail',kwargs={'pk':self.pk})

forms.py

class UserForm(UserCreationForm):
    class Meta:
        fields = ('username', 'email', 'password1', 'password2')
        model = get_user_model()

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)


 class PostForm(forms.ModelForm):
     class Meta:
         model = Post
         fields = ('title', 'text',)

views.py

class SignUpView(CreateView):
    form_class = UserForm
    success_url = reverse_lazy('login')
    template_name = 'registration/signup.html'

class PostCreateView(LoginRequiredMixin, CreateView):
    login_url = '/login/'
    redirect_field_name = 'blog/post_detail.html'

    form_class = PostForm
    model = Post

Answer 1

你的代码很好，只是你没有传递用户对象来更新作者字段。

我认为在您的 PostCreateView 中，您可以这样做：

class PostCreateView(LoginRequiredMixin, CreateView):
     login_url = '/login/'
     redirect_field_name = 'blog/post_detail.html'
     form_class = PostForm
     model = Post

     def valid_form(self,form, **kwargs):
         form.instance.author = self.request.user
         super(PosetCreateView, self).get_context_data(kwargs)

         return HttpResponse('/')

Answer 2

我找到了一个适用于我的案例的解决方案，并且与@Silas 的非常相似。

views.py

class PostCreateView(LoginRequiredMixin, CreateView):
    login_url = '/login/'
    redirect_field_name = 'blog/post_detail.html'
    form_class = PostForm
    model = Post

    def form_valid(self, form):
        self.object = form.save(commit=False)
        self.object.author = self.request.user
        self.object.save()
        return super().form_valid(form)

models.py

class Post(models.Model):
author = models.ForeignKey('auth.User', on_delete=models.CASCADE)
...

如何使用 CreateView 将用户对象传递给模型窗体

How to pass user object to a Modelform using CreateView

django

modelform

django-class-based-views