Question

django文档涵盖cleaning and validating FIELDS that depend on each other，但我找不到任何涵盖相互依赖的形式的内容。

我有一个HTML表单，其中包含标准django表单和django表单集。正确验证表单集中的每个表单完全是基于主表单中的值的条件（例如，选中主表单上的框，以及表单集中每个表单上的特定字段< / em>突然变得必需）。

我的直觉是“简单地”将整个主窗体传递给formset验证调用，如下所示：

def my_view(request): MyFormSet = formset_factory(MyForm, extra=2, can_order=True) if request.method == 'POST': form = MainForm(request.POST) formset = MyFormSet(request.POST) if form.is_valid() and formset.is_valid(form): # <-- ?!?! # The formset is now validated based on the form

但是，为了做到这一点，我相信我必须覆盖formset is_valid()以及基础表单is_valid()和clean()方法。所以，它很快就变得非常混乱。

有更好的方法吗？

Answer 1

我曾经调查了这样的事情，本教程http://yergler.net/blog/2009/09/27/nested-formsets-with-django/非常有帮助。

另一种方法是：

def my_view(request):
MyFormSet = formset_factory(MyForm, extra=2, can_order=True)

if request.method == 'POST':
    form = MainForm(request.POST)
    formset = MyFormSet(request.POST, other_form = form)

    if form.is_valid() and formset.is_valid(): # <-- ?!?!
        # The formset is now validated based on the form

然后

class MyFormSet(...):

   def __init__(self, *args, **kwargs):
       if kwargs.has_key('other_form'):
           self.myformforlater = kwargs.pop('other_form')
       Super(MyFormSet, self).__init__(*args, **kwargs)

这样您只需覆盖init方法，并且可以从任何验证步骤访问外部表单。

Answer 2

这是我最终得到的代码，使用了Ted的答案（django 1.3）：

class BaseMyFormSet(BaseFormSet):
    main_form = None

    def __init__(self, *args, **kwargs):
        # Save the main form until validation
        if kwargs.has_key('main_form'):
            self.main_form = kwargs.pop('main_form')

        super(BaseMyFormSet, self).__init__(*args, **kwargs)

    def clean(self):
        if any(self.errors):
            # Don't bother validating the formset unless each 
            # form is valid on its own
            return

        checkbox = self.main_form.cleaned_data['my_checkbox']

        if checkbox:
            for form in self.forms:
                # Do some extra validation


def my_view(request):
    MyFormSet = formset_factory(MyForm, extra=2, can_order=True,
        formset=BaseMyFormSet)

    if request.method == 'POST':
        form = MainForm(request.POST)
        formset = MyFormSet(request.POST, main_form=form)

        if form.is_valid() and formset.is_valid():
            # The formset is now validated based on the form

Django：清理和验证相互依赖的FORMS

2 个答案: