Django独特的模型字段验证形式

Question

我有一个带有一些独特字段的模型,我正在为它编写一个表单.我找到了一些[validate_unique][1]方法的引用,当你调用它时应该检查字段的唯一性,但我的表单.is_valid()总是返回True.

我的测试用例:

class ServerFormTest( TestCase ):
    def setUp( self ):
        self.server = Server.objects.create( host = "127.0.0.1", name = "localhost" )

    def test_unique_name(self):
        form = ServerForm({
            'name': 'localhost',
            'host': '127.0.0.1'
        })

        self.assertFalse( form.is_valid( ) )

和我的形式:

class ServerForm( forms.ModelForm ):
    class Meta:
        model = Server
        fields = ('name', 'host')

    def clean( self ):
        self.validate_unique()
        return self.cleaned_data

服务器型号:

class Server( models.Model ):
    host = models.GenericIPAddressField( blank = False, null = False, unique = True )
    name = models.CharField( blank = False, null = False, unique = True, max_length = 55 )

Answer 1

validate_unique是一种Model方法.

运行超类clean方法应该考虑给出的模型唯一性检查ModelForm.

class MyModelForm(forms.ModelForm):    
    def clean(self):
        cleaned_data = super(MyModelForm, self).clean()
        # additional cleaning here
        return cleaned_data

django文档中有一个警告,特别是关于覆盖清理ModelForms,它会自动执行几个模型验证步骤.