Formset初始选择字段

Question

我有一个表单(工作正常)，我想传递给一个Formset，但是我为ChoiceFields传递的元组没有呈现或者有一个错误：

这是原始表格：

class PO_Form(forms.Form):
    def __init__(self, baseItem_choices, color_choices, material_choices, sizeGroup_choices, *args, **kwargs):
        super(PO_Form, self).__init__(*args, **kwargs)
        self.fields['base_item'].choices = baseItem_choices
        self.fields['color_or_print'].choices = color_choices
        self.fields['material'].choices = material_choices
        self.fields['size_group'].choices = sizeGroup_choices

    base_item = forms.ChoiceField(choices=(), required=True)
    color_or_print = forms.ChoiceField(choices=(), required=True)
    material = forms.ChoiceField(choices=(), required=True)
    size_group = forms.ChoiceField(choices=(), required=True)

此表单ChoiceFields是从我在视图中创建的各种参数列表中填充的：

form = PO_Form(baseItem_choices, color_choices, material_choices, sizeGroup_choices)

我是如何用一套表格来完成这个任务的？我尝试了两种方法: 1：

PO_FormSet = formset_factory(PO_Form(baseItem_choices, color_choices, material_choices, sizeGroup_choices), extra=2)

我知道这个错误：

在内部39中文件"/Library/Python/2.7/site-packages/django/core/handlers/exception.py“。响应=get_response(请求) "/Library/Python/2.7/site-packages/django/core/handlers/base.py“文件在_get_response 187中。响应= self.process_exception_by_middleware(e，请求) "/Library/Python/2.7/site-packages/django/core/handlers/base.py“文件在_get_response 185中。response =wrapped_callback(请求、*callback_args、**callback_kwargs) 在(Personal)/django/projectos/WholeSale/ShowRoom/views.py“115中文件"/Users/carlospceballos/Dropbox (Personal)/django/projectos/WholeSale/ShowRoom/views.py”“。PO_FormSet = formset_factory(PO_Form(baseItem_choices，color_choices，material_choices，sizeGroup_choices)，extra=2) 文件"/Library/Python/2.7/site-packages/django/forms/formsets.py“在formset_factory 449中。返回type(form.name + str('FormSet')，(格式化集，) 异常类型: AttributeError at /showroom/po_populate/3/ Exception值：'PO_Form‘对象没有属性'name’

2:我尝试在视图中设置初始值：

PO_FormSet = formset_factory(PO_Form(), extra=2)
formset = PO_FormSet(initial=[
    {   'base_item': baseItem_choices,
        'color_or_print': color_choices,
        'material': material_choices,
        'size_group': sizeGroup_choices, }
])

如果我不修改PO_Form，就会产生一个错误，该表单包含5个参数，而我只传递1。如果我修改该表单(去掉init)，我不会得到任何错误，但是选择字段是空的。我做错什么了？

Answer 1

您将表单的实例而不是表单类传递给formset_factory方法。可以在实例化窗体集之后设置选项。

forms.py：

class PO_Form(forms.Form):
    base_item = forms.ChoiceField(choices=(), required=True)
    color_or_print = forms.ChoiceField(choices=(), required=True)
    material = forms.ChoiceField(choices=(), required=True)
    size_group = forms.ChoiceField(choices=(), required=True)

views.py：

PO_FormSet = formset_factory(PO_Form)

formset = PO_FormSet()

for form in formset.forms:
    form.fields['base_item'].choices = baseItem_choices
    form.fields['color_or_print'].choices = color_choices
    form.fields['material'].choices = material_choices
    form.fields['size_group'].choices = sizeGroup_choices