python - Django - 以一种形式重复n次表单字段

Question

我有一个包含多个字段的 Django 表单，其中一个字段需要重复 n 次(其中 n 在设计时未知)我将如何编写代码(如果可能的话)？

例如而不是:-

Class PaymentsForm(forms.form):
    invoice = forms.CharField(widget=ValueHiddenInput())
    total = forms.CharField(widget=ValueHiddenInput())
    item_name_1 = forms.CharField(widget=ValueHiddenInput())
    item_name_2 = forms.CharField(widget=ValueHiddenInput())
    .
    .
    .
    item_name_n = forms.CharField(widget=ValueHiddenInput())

我需要这样的东西:-

Class PaymentsForm(forms.form):
    invoice = forms.CharField(widget=ValueHiddenInput())
    total = forms.CharField(widget=ValueHiddenInput())
    item_name[n] = forms.CharField(widget=ValueHiddenInput())

谢谢，
理查德。

Answer 1

您可以在表单的 __init__ 方法中创建重复字段:

class PaymentsForm(forms.Form):
    invoice = forms.CharField(widget=forms.HiddenInput())
    total = forms.CharField(widget=forms.HiddenInput())

    def __init__(self, *args, **kwargs):
        super(PaymentsForm, self).__init__(*args, **kwargs)
        for i in xrange(10):
            self.fields['item_name_%d' % i] = forms.CharField(widget=forms.HiddenInput())

可以找到更多关于动态表单的信息，例如here

编辑:回答您评论中的问题:只需将重复次数作为 __init__ 方法的参数，如下所示:

    def __init__(self, repetitions, *args, **kwargs):
        super(PaymentsForm, self).__init__(*args, **kwargs)
        for i in xrange(repetitions):
            self.fields['item_name_%d' % i] = forms.CharField(widget=forms.HiddenInput())

然后在您的 View 中(或您创建表单的任何地方):

payments_form = PaymentsForm(10)