Django-get_context_data缺少1个必需的位置参数：“ form”

如何解决Django-get_context_data缺少1个必需的位置参数：“ form”

我正在尝试将inlineformset添加到Django Blog项目。我收到了帖子，我想通过基于类的视图将多个图像添加到帖子中。但是，当我尝试获取get_context_data时，出现此错误：

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)

有人知道为什么我会收到这种错误吗？谢谢。

解决方法

您应该删除form参数。无论如何，get_context_data中永远不会使用该表单：

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

     def get_context_data(self,*args,**kwargs):
         context = super().get_context_data(*args,**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()
          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)