本文介绍了在保存前将数据添加到ModelForm对象的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

说我有一个这样的表单:



forms.py



$ _ code> class CreateASomethingForm(ModelForm):
class Meta:
model = Something
fields = ['field2','field3','field4' ]

我希望表单有这三个字段。然而,我的某些类也有 field1 。我的问题是 - 如果我不使用 ModelForm 来收集数据,我如何将数据添加到 field1 中。我试着做这样的事情,但是它不起作用,我不确定正确的方法来解决这个问题:



views.py

  def create_something_view(request):
if(request.method =='POST'):
#根据POST数据创建表单的对象
obj = CreateASomething(request.POST)
#**将数据添加到空白字段1 **(抛出错误)
obj [' field1'] = request.user
#...验证,保存,然后重定向

我收到的错误是:

  TypeError:'CreateAClassForm'对象不支持项目分配

在Django中,在保存之前,将数据分配给 ModelForm 对象的正确方法是什么? ?

解决方案
  form = CreateASomething(request.POST)
如果表单。 is_valid():
obj = form.save(commit = False)
obj.field1 = request.user
obj.save()


Say I have a form that looks like this:

forms.py

class CreateASomethingForm(ModelForm):
    class Meta:
        model = Something
        fields = ['field2', 'field3', 'field4']

I want the form to have these three fields. However my Somethingclass also has field1. My question is - how do I add data to field1, if I am not using the ModelForm to collect the data. I tried doing something like this, but it isn't working and I am unsure on the proper way to solve this:

views.py

def create_something_view(request):
    if (request.method == 'POST'):
        # Create an object of the form based on POST data
        obj = CreateASomething(request.POST)
        # ** Add data into the blank field1 ** (Throwing an error)
        obj['field1'] = request.user
        # ... validate, save, then redirect

The error I receive is:

TypeError: 'CreateAClassForm' object does not support item assignment

In Django, what is the proper way to assign data to a ModelForm object before saving?

解决方案
form = CreateASomething(request.POST)
if form.is_valid():
    obj = form.save(commit=False)
    obj.field1 = request.user
    obj.save()

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09-13 00:46