Question

I use ModelForm to create my form. All works fine except 1 thing - validating the unique field. Code:

class Article(models.Model):
...
title = models.CharField(max_length=255, unique=True, error_messages={ max_length  :  max translation ,
                                                                                                     unique  :  unique translation ,
                                                                                                     required  :  req translation ,})
...

class ArticleForm(ModelForm):
...
title = forms.CharField(max_length=255, min_length=3, error_messages={ required  :  req translation ,
                                                                                              min_length  :  min translation ,
                                                                                              max_length  :  max translation ,
                                                                                              unique  :  unique translation ,})

但是,当我用非贵族头衔挽救我的形式时,我拿不出我的习俗错误,但我却出现违约错误。如何纠正这一错误,我独特的实地错误是如何展示的?

EDIT: I found, I think, very convenient way to do that. Maybe someone will use it:)

def unique_error_message(self, model_class, unique_check):
    if  put_field_name_here  in unique_check and len(unique_check) == 1:
        return  Here goes a custom unique error 

    return super(Article, self).unique_error_message(model_class, unique_check)

Answer 1

没有任何<代码>unique对定制验证信息至关重要。我这样说并不值得我们定制,但是,如果你必须遵循以下做法:

import re
class ArticleForm(ModelForm):
    def clean(self, *args, **kwargs):
       result = super(ArticleForm, self).clean(*args, **kwargs)
       if self.non_field_errors:
           for i,msg in enumerate(self.non_field_errors):
               if re.match("^.+ already exists.$", msg):
                   self.errors["__all__"][i] = custom_msg # Put your own text here
       return result

这种办法依靠的是Django的无证内部人员,但现在应该trick。我再次建议坚持违约。

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