Question

我想知道如何从查询集中排除可编辑对象，如果我使用相同的表单创建对象，它仍然有效。

我的表格：

class CountryForm(forms.ModelForm):
    """Form to create or edit Countries."""

    name = forms.CharField()
    flavor = forms.CharField(
    widget=forms.Textarea(attrs={'width': 300, 'height': 100}))
    history = forms.CharField(
        widget=forms.Textarea(attrs={'width': 300, 'height': 100}))
    likes_set = Country.objects.all().exclude(self)
    likes = forms.ModelChoiceField(queryset=likes_set, empty_label="Country it likes"

    class Meta:
        model = Country

Answer 1

您需要在__init__()方法中执行此操作，并在实例化表单时传递instance变量（如果可用）。

class CountryForm(forms.ModelForm):
    """Form to create or edit Countries."""

    name = forms.CharField()
    flavor = forms.CharField(
    widget=forms.Textarea(attrs={'width': 300, 'height': 100}))
    history = forms.CharField(
        widget=forms.Textarea(attrs={'width': 300, 'height': 100}))
    likes = forms.ModelChoiceField(queryset=Country.objects.all(), empty_label="Country it likes"

    class Meta:
        model = Country

    def __init__(self, *args, **kwargs):
        super(CountryForm, self).__init__(*args, **kwargs)
        if 'instance' in kwargs:
            self.fields['likes'].queryset = Country.objects.exclude(kwargs['instance'])

在视图中，您必须创建表单

myform = CountryForm(instance=country_obj)

或

myform = CountryForm(request.POST, instance=country_obj)

django表单创建或编辑排除对象

1 个答案: