Django编辑表单查询集的查询+当前选中的选项如何获取？

Question

我的表单.py在

class CreateVesselForm(forms.ModelForm):
class Meta:
    model = Vessel
    exclude = ['active']

# Filtering Choices
def __init__(self, *args, **kwargs):
    super(CreateVesselForm, self).__init__(*args, **kwargs)
    # Filtering just Free Slots
    self.fields['slot'].queryset = Slot.objects.filter(is_free=True)
    # Filtering just Free Storages
    self.fields['storage'].queryset = Storage.objects.filter(is_free=True)

Slot字段是ForeignKey，而Storage字段是manytomy字段。在

在我的视图.py，当我保存此表单时，我将“is_free”的状态更改为False。但是，当编辑此项（容器）时（从表单实例获取它）之前已经选择的选项不再出现在表单字段中，因为我的查询集只是按status=True进行筛选。在

对我来说，最完美的形式是：

对于ForeignKey

当前所选项目“容器.槽" + 插槽对象.filter（是否免费=真的）？在

多次

当前所选项目“容器.储存" + 存储.objects.filter（是否免费=真的）？在

有没有办法完成它？在

Answer 1

你可以这样做：

class CreateVesselForm(forms.ModelForm):

    class Meta:
        model = Vessel
        exclude = ['active']

    # Filtering Choices
    def __init__(self, *args, **kwargs):
        super(CreateVesselForm, self).__init__(*args, **kwargs)
        if kwargs['instance']:
            self.fields['storage'].queryset = kwargs['instance'].storage.all()|Storage.objects.filter(is_free=True)
            self.fields['slot'].queryset = Slot.objects.filter(pk=kwargs['instance'].slot.pk)|Slot.objects.filter(is_free=True)