Django 中基于类的通用视图的问题

发布于 2024-11-16 12:31:55 字数 907 浏览 3 评论 0原文

我正在尝试使用基于 Django 类的通用视图编写 CRUD 应用程序。以下是我编写的用于在数据库中创建新用户的代码。

  from django.views.generic import CreateView
  from django.contrib.auth.decorators import login_required
  from django.contrib import messages

  class UserCreateView(CreateView):
  """ 
  Display and accept a new user to be created in db
  """
    form_class = ProfileForm
    template_name = 'userdb/profile_form.html'
    success_url = '/organization/users/'

    def post(self, request, *args, **kwargs):
      messages.success(request, "Success", extra_tags='msg')
      return super(UserCreateView, self).post(request, *args, **kwargs)

    @method_decorator(login_required)
    def dispatch(self, *args, **kwargs):
      return super(UserCreateView, self).dispatch(*args, **kwargs)

请注意，要添加向用户显示的成功消息，我必须扩展 post 函数。我知道这不是一个好方法，因为当调用此函数时，无法确定提交的表单是否包含有效数据。所以我的问题是，是否有推荐的方法将 Django 消息传递框架与基于类的通用视图相结合？

原文

I'm trying to write a CRUD application using Djangos class based generic views. Following is the code i wrote to create a new user in the db.

  from django.views.generic import CreateView
  from django.contrib.auth.decorators import login_required
  from django.contrib import messages

  class UserCreateView(CreateView):
  """ 
  Display and accept a new user to be created in db
  """
    form_class = ProfileForm
    template_name = 'userdb/profile_form.html'
    success_url = '/organization/users/'

    def post(self, request, *args, **kwargs):
      messages.success(request, "Success", extra_tags='msg')
      return super(UserCreateView, self).post(request, *args, **kwargs)

    @method_decorator(login_required)
    def dispatch(self, *args, **kwargs):
      return super(UserCreateView, self).dispatch(*args, **kwargs)

Note that to add a success message to be displayed to the user I've had to extend the post function. I know this is not a good way to do this as, when this function gets called it's not decided whether the submitted form contains valid data. So my question is, Is there recommended way of combining Djangos messaging framework with class based generic views?

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旧情别恋 2024-11-23 12:31:55

答案取决于您具体希望使用消息传递框架做什么。如果需要为每个 get 请求调用它，那么您自然需要将其放入 get 方法中（重点是没有合适的位置来放置此代码）。

不管怎样，听起来你正在寻找一个只有在表单有效时才会触发的地方。

CreateView 使用 ModelFormMixin 实现了 form_valid 方法，该方法仅在成功保存表单时触发。完美的！

def form_valid(self, form):
    messages.success(self.request, "Success", extra_tags='msg')
    return super(UserCreateView, self).form_valid(form)  
    # ModelFormMixin will now save
    # FormMixin will now redirect to success_url()
    # override above behavior if you need to do something with the object

The answer depends on what specifically you're looking to do with the messaging framework. If it needs to be called for every get request you'd naturally need to put it in the get method (point being there's no one right place to put this code).

Anyways, it sounds like you're looking for a place that's only triggered when the form is valid.

CreateView uses the ModelFormMixin which implements a form_valid method which is only fired upon successful form saving. Perfect!

def form_valid(self, form):
    messages.success(self.request, "Success", extra_tags='msg')
    return super(UserCreateView, self).form_valid(form)  
    # ModelFormMixin will now save
    # FormMixin will now redirect to success_url()
    # override above behavior if you need to do something with the object

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