这与我的earlier question有关。
我想拥有一个包含Choice和TextInput小部件的MultiValueField。如果用户从Choice中选择“OTHER”,则应保存TextInput的值。否则,应保存Choice的值。到目前为止,我有以下代码:
custom_choices = [("one","one"),("two","two"),("OTHER","OTHER")]
class MyMultiWidget(forms.MultiWidget):
def __init__(self,*args,**kwargs):
widgets = (
forms.Select(choices=custom_choices),
forms.TextInput(),
)
super(MyMultiWidget, self).__init__(widgets,*args,**kwargs)
def decompress(self, value):
if value:
return value.split("|")
return ['', '']
class MyMultiValueField(forms.MultiValueField):
def __init__(self, *args, **kwargs):
fields = (
forms.CharField(max_length=128,required=True),
forms.CharField(max_length=128,required=False),
)
super(MyMultiValueField, self).__init__(fields, *args, **kwargs)
self.widget = TestMultiWidget()
def compress(self, data_list):
if data_list:
return '|'.join(data_list)
class MyTestField(models.CharField):
def formfield(self, **kwargs):
return super(MyTestField, self).formfield(form_class=MyMultiValueField)
class MyModel(models.Model):
myField = MyTestField()
但是,每当我尝试保存TextInput中不包含值的内容时,我都会收到验证错误“此字段是必需的”。尽管上面有“required = False”kwarg。
我试图在clean函数中添加一些逻辑;如果Choice小部件的值为“OTHER”,则忽略TextInput的小部件:
def clean(self,value):
if value[0]!="OTHER":
value[1]=u''
else:
if not value[1]:
msg = "unspecified value"
raise forms.ValidationError(msg)
elif "|" in value[1]:
msg = "bad value ('|' character is not allowed"
raise forms.ValidationError(msg)
super(TestFormField,self).clean(value)
但这没有效果。
有什么建议吗?
答案 0 :(得分:0)
正确版本的清洁应该是这样的:
def clean(self,value):
if value[0] != "OTHER":
value[1] = u' '
else:
if value[1].strip() == u' ':
msg = "unspecified value"
raise forms.ValidationError(msg)
elif "|" in value[1]:
msg = "bad value ('|' character is not allowed)"
raise forms.ValidationError(msg)
return "|".join(value)