在Django表单中进行验证之前更改表单值 [英] change a form value before validation in Django form

问题描述

我有一个django表单，并在我的view函数上执行此操作：

  search_packages_form = SearchPackagesForm（data = request.POST ）
  

我想覆盖一个称为price的表单字段，该字段已这样清除：

 价格=表格.ChoiceField（选择= PRICE_CHOICES，必填= False，小部件=表格.RadioSelect）
  

我想在调用 search_packages_form.is_valid（）

我想这样做：

  search_packages_form.data ['price'] = NEW_PRICE 
  

但这不起作用。有什么想法吗？

解决方案

可能不是Django方式，而是基于https://stackoverflow.com/a/17304350/2730032 我想在验证之前更改表单值的最简单方法是执行以下操作：

  def search_packages_view（request）：
 if request.method =='POST'
 Updated_request = request.POST.copy（ ）
 Updated_request.update（{'price'：NEW_PRICE}）
 search_packages_form = SearchPackagesForm（updated_request）
 if search_packages_form.is_valid（）：
＃你们都很好
  

这是可行的，但是如果有人有其他更符合Django的方式，或者是否没有：然后解释原因。

I have a django form and on my view function I do this :

search_packages_form = SearchPackagesForm( data = request.POST )

I would like to overwrite a form field called price which is decleared as such :

price = forms.ChoiceField( choices = PRICE_CHOICES, required = False,widget = forms.RadioSelect )

I would like to overwrite the form field before calling search_packages_form.is_valid()

I thought of doing :

search_packages_form.data['price'] = NEW_PRICE

But it does not work. Any ideas ?

解决方案

Probably not the Django way but based on https://stackoverflow.com/a/17304350/2730032 I'm guessing the easiest way to change your form value before validation is to do something like the following:

def search_packages_view(request):
    if request.method == 'POST'
        updated_request = request.POST.copy()
        updated_request.update({'price': NEW_PRICE})
        search_packages_form = SearchPackagesForm(updated_request)
        if search_packages_form.is_valid():
             # You're all good

This works but I'd be interested if anyone has another way that seems more in line with Django, or if there isn't: then an explanation about why.

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