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from django.utils.text import capfirst
class YourModel(models.Model):
# fields
def unique_error_message(self, model_class, unique_check):
opts = model_class._meta
model_name = capfirst(opts.verbose_name)
# A unique field
field_name = self._meta.unique_together[0]
field_label = capfirst(opts.get_field(field_name).verbose_name)
# Insert the error into the error dict, very sneaky
return _(u"%(model_name)s with this %(field_label)s already exists.") % {
'model_name': unicode(model_name),
'field_label': unicode(field_label)
}
Source:stackexchange.com