如何将optgroup添加到Django ModelMultipleChoiceField？ [英] How to add optgroups to a django ModelMultipleChoiceField?

问题描述

我有一个带有 ModelMultipleChoiceField 的表格来列出类别。
我想使用 Category.group 字段对类别进行分组。

I have a form with a ModelMultipleChoiceField to list of categories. I would like to group categories using the Category.group field.

我认为通过更改该字段。在init函数中选择 会达到目的

I thought that by changing the field.choices in the init function it will make the trick

class CategoriesField(forms.ModelMultipleChoiceField):
    def __init__(self, queryset, **kwargs):
        super(forms.ModelMultipleChoiceField, self).__init__(queryset, **kwargs)
        self.queryset = queryset.select_related()
        self.to_field_name=None

        group = None
        list = []
        self.choices = []

        for category in queryset:
            if not group:
                group = category.group

            if group != category.group:
                self.choices.append((group.title, list))
                group = category.group
                list = [(category.id, category.name)]
            else:
                list.append((category.id, category.name))
        try:
            self.choices.append((group.title, list))
        except:
            pass

但是 ModelChoiceIterator 仍会删除 self.choices 在 __ init __ 函数中设置的信息。

But the ModelChoiceIterator still erase the self.choices info that are set in the __init__ function.

如何正确执行此操作

推荐答案

实际上它的工作方式就像我刚才解释的那样，但是请不要忘记该部分：

Actually it is working like I just explain but dont forget that part :

class ProfilForm(ModelForm):
    categories  = CategoriesField(queryset=Category.objects.all().order_by('group'), label=_(u'Catégories'))

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