Add support of custom violation_error_code for UniqueTogetherValidator #9714
Description
Will be nice to have an option to pass custom code for ValidationError based on name of UniqueTogether constraint as it's unique or better to use violation_error_code .
Line to fix: Link to the line for fix - here is is hard coded to code='unique'
Example:
class Pet(models.Model):
name = models.CharField(max_length=100)
animal_type = models.CharField(max_length=100)
owner_name = models.CharField(max_length=100)
class Meta:
constraints = [
UniqueConstraint(
fields=["name", "animal_type"],
name="unique_pet",
violation_error_code="unique_pet",
),
UniqueConstraint(
fields=["owner_name", "animal_type"],
name="unique_pet_type",
violation_error_code="unique_pet_type",
),
]
If there are 2 different constraints there is no way to distinguish errors to know which constraint failed as all errors always have code unique and look like:
[{'non_field_errors': [ErrorDetail(string='The fields name, animal_type must make a unique set.', code='unique')]}]
For code name attr of constraint can be used. And error could looks like:
[{'non_field_errors': [ErrorDetail(string='The fields name, animal_type must make a unique set.', code='unique_pet_type')]}]