扩展Django的通用视图 [英] Extending Django's Generic Views

问题描述

我正在Django中编写我的第一个应用程序，而且我有一个问题： create_object Generic View;在我的 urls.py 中，我有：

 （r'^新$'，CreateView.as_view（）），
  

问题是当用户提交新的表单，我需要操纵将被保存到数据库的数据（我实际上需要添加 user_id 外键）;没有通用意见我曾经写过：

  form = ClientForm（request.POST）
如果form.is_valid（） ：
 data = form.save（commit = False）
 data.user = request.user 
 data.save（）
 form.save_m2m（）
  

在我的视图（通知 data.user = request.user ）。我已经搜索过Django文档，但是找不到这样做的方式（也许通过扩展 CreateView 类） - 在本书中，只有一个覆盖的例子一个 ListView 类的 get_object 方法来更新 last_accessed_date

解决方案

您可以通过覆盖 get_form 方法来执行此操作：导入CreateView

class CustomCreateView（CreateView）




  def get_form（self，form_class）：
 form = super（CustomCreateView，self）.get_form（form_class）
 form.instance.user = self.request.user 
 return form 
  

编辑：现在我将覆盖 form_valid 根据< a href =https://stackoverflow.com/a / 7148188/400691> Issac Kelly的回答：

  from django.views.generic import CreateView 
 
 class CustomCreateView（CreateView）：
 def form_valid（self，form）：
 form.instance.user = self.request.user 
 return super（CustomCreateView，self）.form_valid （形式）
  




I'm writing my first app in Django, and I have a problem with the create_object Generic View; In my urls.py, I have:

(r'^new$', CreateView.as_view()),

The problem is that when the user submits the "new" form, I need to manipulate the data that will be saved to the database (I actually need to add the user_id foreign key); without Generic Views I used to write:

    form = ClientForm(request.POST)
    if form.is_valid():
        data = form.save(commit=False)
        data.user = request.user
        data.save()
        form.save_m2m()

in my view (notice data.user=request.user). I've searched Django docs but I can't find a way to do this (maybe by extending the CreateView class) - somewere in The Book there is only an example that overrides the get_object method of a ListView class to update a last_accessed_date field.

解决方案

You can do this by overriding the get_form method:

from django.views.generic import CreateView

class CustomCreateView(CreateView):
    def get_form(self, form_class):
        form = super(CustomCreateView, self).get_form(form_class)
        form.instance.user = self.request.user
        return form

EDIT: Nowadays I would override form_valid as per Issac Kelly's answer:

from django.views.generic import CreateView

class CustomCreateView(CreateView):
    def form_valid(self, form):
        form.instance.user = self.request.user
        return super(CustomCreateView, self).form_valid(form)

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