Django-在一个表单中重复一个表单字段n次 [英] Django - Repeating a form field n times in one form

问题描述

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（其中在设计时不知道n），我将如何进行编码（如果可能的话）？

I have a Django form with several fields in it one of which needs to be repeated n times (where n is not known at design time) how would I go about coding this (if it is possible at all)?

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())

我需要类似的东西： -

I need something like :-

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。

Thanks,
Richard.

推荐答案

您可以在表单的 __ init __ 方法中创建重复的字段：

You can create the repeated fields in the __init__ method of your form:

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())

有关动态表单的更多信息，例如此处

More about dynamic forms can be found e.g. here

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

edit: to answer the question in your comment: just give the number of repetitions as an argument to the __init__ method, something like this:

    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())

，然后在您看来（或您创建表格的任何地方）：

and then in your view (or wherever you create the form):

payments_form = PaymentsForm(10)

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