Question

我在表单中有一个动态表单。当我实例化表单时，如何从我的视图中传递参数？

类似的东西：

form = DynamicForm("some string argument I'm passing to my form")

这是我的形式：

class DynamicForm(Form):
def __init__(self, *args, **kwargs):
    super(DynamicForm, self).__init__(*args, **kwargs)
    for item in range(5):
        self.fields['test_field_%d' % item] = CharField(max_length=255)

Answer 1

将其添加为关键字参数，假设它名为my_arg。在调用pop()之前，请确保super()关键字arg，因为父类的init方法不接受额外的关键字参数。

class DynamicForm(Form):
  def __init__(self, *args, **kwargs):
    my_arg = kwargs.pop('my_arg')
    super(DynamicForm, self).__init__(*args, **kwargs)
    for item in range(5):
        self.fields['test_field_%d' % item] = CharField(max_length=255)

当你创建表单时，就像这样：

form = DynamicForm(..., my_arg='value')

Answer 2

您还可以通过重写FormMixin的get_form_kwargs（在基于类的视图中提供）来实现此目的。

class CustomDynamicFormView(FormView):  # inherit any view with formmixin...
      form_class = DynamicForm

      def get_form_kwargs(self):
          kwargs = super(CustomDynamicFormView, self).get_form_kwargs()
          kwargs['custom_variable'] = 'my custom variable'
          return kwargs

然后以您的形式

class DynamicForm(forms.Form):
    def __init__(self, *args, *kwargs):
        my_var = kwargs.pop('custom_variable') 
        # remove this b4 calling super otherwise it will complian
        super(DynamicForm, self).__init__(*args, **kwargs)
        # do what you want with my_var

For more information check here

将参数传递给django中的动态表单

2 个答案: