Django ModelForm 覆盖 __init__ [英] Django ModelForm overriding __init__

问题描述

我正在尝试使用当前用户所属的 Django 组填充 ModelForm 的选择列表.

I'm trying to populate a Select list of a ModelForm, with the Django groups the current users belongs to.

没有出现错误，但我只得到一个空的选择列表.

No errors arise, but I get only an empty Select list.

这是我的代码:

class ArchiveForm(forms.ModelForm):

    class Meta:
        model = Archive
        fields = ['tags', 'version', 'sharegp']
        localized_fields = None
        labels = {'tags': 'Related Keywords'}


    sharegp = forms.ChoiceField(label='Share with groups')

    def __init__(self, user, *args, **kwargs):

        #import pudb;pudb.set_trace()
        self.user = user
        super(ArchiveForm, self).__init__(*args, **kwargs)
        self.fields['sharegp'].queryset = Group.objects.filter(user=self.user)
        self.fields['sharegp'].widget.choices = self.fields['sharegp'].choices

请注意，如果我在 __init__ 方法的第一行中启用调试器，并沿着函数向前推进，则该行:

Note that if I enable the debugger in the first line of the __init__ method, and step forward all along the function, the line:

    self.fields['sharegp'].queryset

给出包含该用户组的正确列表，但不会传递到实际表单.

Gives the correct list containing the groups for that user, but that is not passed to the actual form.

我会错过什么?谢谢！

推荐答案

这就是我最终解决这个问题的方法:

This is how I ended up solving this:

我错误地选择了字段类型:正确的是 ModelChoiceField:

I was wrongly choosing the type of the field: The correct one is ModelChoiceField:

class ArchiveForm(forms.ModelForm):

    class Meta:
        model = Archive
        fields = ['tags', 'version', 'sharegp']
        localized_fields = None
        labels = {'tags': 'Related Keywords'}

    user = None
    usergroups = None
    sharegp = forms.ModelChoiceField(label='Share with groups', queryset=usergroups)

    def __init__(self, user, *args, **kwargs):

        self.user = user
        self.usergroups = Group.objects.filter(user=self.user)
        super(ArchiveForm, self).__init__(*args, **kwargs)
        self.fields['sharegp'].queryset = self.usergroups

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