在Django表单中验证之前更改表单值

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

我有一个django表单，在我的视图函数中我这样做：

search_packages_form = SearchPackagesForm( data = request.POST )

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

我想覆盖一个名为price的表单字段，该字段被删除：

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()

我想在调用search_packages_form.is_valid（）之前覆盖表单字段

I thought of doing :

我想到了：

search_packages_form.data['price'] = NEW_PRICE

But it does not work. Any ideas ?

但它不起作用。有任何想法吗？

2 个解决方案

#1

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

可能不是Django方式，但基于https://*.com/a/17304350/2730032我猜测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(request.POST)
        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.

这有效，但我感兴趣的是，如果有人有另一种方式似乎更符合Django，或者如果没有：那么解释为什么。

#2

-1

form.is_valid() runs through your form's (and model's in case of a ModelForm) clean method's, returning True or False

form.is_valid（）运行你的表单（和ModelForm的模型）clean方法，返回True或False

If you plan on changing form data you can do it within the general clean method or at field level, e.g.

如果您计划更改表单数据，可以在常规清理方法或字段级别执行此操作，例如

class YourForm(DerivingClass):
    # regular stuff

    def clean_<ATTR>(self):
        # here
        return self.cleaned_data

    def clean(self):
        # or here
        return super(YourForm, self).clean()

#1