使用django 1.2 GAE进行表单验证

class AForm(djangoforms.ModelForm):

  def clean_name(self):
      value = self.data[\'name\']

      if not value:
        raise ValidationError(\"No name.\")
        return self.data[\'name\']

  def clean_email(self):
      pass

ValidationError(_(\"No name.\"))

from django import forms
from django.utils.translation import ugettext_lazy as _

class AForm(forms.ModelForm):

    def clean_name(self):
        # Get the value from the cleaned data.
        value = self.cleaned_data[\'name\']

        # Check it exists.
        if not value:
            raise forms.ValidationError(_(\"No name.\"))

        # Return the (now validated) value.
        return self.data[\'name\']