Django: How to override unique_together error message?
You can do this since Django 1.7
from django.forms import ModelFormfrom django.core.exceptions import NON_FIELD_ERRORSclass ArticleForm(ModelForm): class Meta: error_messages = { NON_FIELD_ERRORS: { 'unique_together': "%(model_name)s's %(field_labels)s are not unique.", } }
Update 2016/10/20: See jifeng-yin's even nicer answer below for Django >= 1.7
The nicest way to override these error messages might be to override the unique_error_message
method on your model. Django calls this method to get the error message whenever it encounters a uniqueness issue during validation.
You can just handle the specific case you want and let all other cases be handled by Django as usual:
def unique_error_message(self, model_class, unique_check): if model_class == type(self) and unique_check == ('field1', 'field2'): return 'My custom error message' else: return super(Project, self).unique_error_message(model_class, unique_check)
For DRF serializers you can use this
from rest_framework import serializersclass SomeSerializer(serializers.ModelSerializer): class Meta: model = Some validators = [ serializers.UniqueTogetherValidator( queryset=model.objects.all(), fields=('field1', 'field2'), message="Some custom message." ) ]
Here is the original source.