form无法自定错误信息

class YourForm(ModelForm):

def __init__(self, *args, **kwargs):
super(YourForm, self).__init__(*args, **kwargs)
self.error_message = 'whatever you want'

def clean_somefield(slef):
if not check_somefield_valid(): //do your check in here
raise formValidateError(self.error_message)
return self

@jokaye

好像还是不行

版本信息：django1.3.1 ,python2.7.1

以下是代码：

class TopicForm(forms.Form):

title=forms.CharField(max_length=50,label='标题')
content=forms.CharField(max_length=300,widget=forms.Textarea(),label='内容')

def __init__(self, *args, **kwargs):
super(TopicForm, self).__init__(*args, **kwargs)
self.error_message = u'不超过300字'

def clean_title(self):
title = self.cleaned_data['title']
if len(title) > 50:
raise forms.ValidationError(u'不超过50字')
return title

def clean_content(self):
content = self.cleaned_data['content']
if len(content) > 300:
raise forms.ValidationError(self.error_message)
return content