Django

Question

我正在尝试将 inlineformset 添加到 Django 博客项目。我得到 post，我想通过基于 Class 的视图将多个图像添加到 post。但是当我尝试 get_context_data 时，我收到此错误：

get_context_data() 缺少 1 个必需的位置参数：'form'

Models.py:

class Post(models.Model):
    title = models.CharField(max_length=100)
    content = RichTextField(blank=True, null=True)

class PostImage(models.Model):
    post = models.ForeignKey(Post, default=None, on_delete=models.CASCADE)
    image = models.ImageField(upload_to='gallery/')
    description = models.CharField(max_length=300, blank=True)

Forms.py

class CreatePostForm(forms.ModelForm):
     class Meta:
         model = Post
         fields = ['title' , 'content' ]

PostImageFormSet = inlineformset_factory(Post, PostImage, fields=['image', 'description'], exclude=['post'] , max_num=30, extra=3)

Views.py

class PostCreateView(LoginRequiredMixin, CreateView):

     form_class = CreatePostForm
     template_name = 'blog/post_form.html'

     def get_context_data(self, form):
         context = super(PostCreateView. self).get_context_data(**kwargs)
         if self.request.POST:
             context['post_images'] = PostImageFormSet(self.request.POST)
         else:
             context['post_images'] = PostImageFormSet()
         return context

      def form_valid(self, form):
          context = self.get_context_data(form=form)
          formset = context['post_images']
          form.instance.author = self.request.user
          if formset.is_valid():
              response = super().form_valid(form)
              formset.instance = self.object
              formset.save()
              return response
          else:
              return super().form_invalid(form)

知道为什么我会收到这种错误吗？谢谢。

Answer 1

您应该删除 form 参数。 get_context_data 中从未使用过该表格：

class PostCreateView(LoginRequiredMixin, CreateView):
     form_class = CreatePostForm
     template_name = 'blog/post_form.html'

     def get_context_data(self<b>, *args, **kwargs</b>):
         context = super().get_context_data(<b>*args, **kwargs</b>)
         if self.request.POST:
             context['post_images'] = PostImageFormSet(self.request.POST)
         else:
             context['post_images'] = PostImageFormSet()
         return context

      def form_valid(self, form):
          context = self.<b>get_context_data()</b>
          formset = context['post_images']
          form.instance.author = self.request.user
          if formset.is_valid():
              response = super().form_valid(form)
              formset.instance = self.object
              formset.save()
              return response
          else:
              return super().form_invalid(form)

Django - get_context_data() 缺少 1 个必需的位置参数：'form'

Django - get_context_data() missing 1 required positional argument: 'form'

python

inline-formset