Adding Custom Django Model Validation

Question

I have a Django model with a start and end date range. I want to enforce validation so that no two records have overlapping date ranges. What\'s the simplest way to implemen

Answer 1

I think you should use this: https://docs.djangoproject.com/en/dev/ref/models/instances/#validating-objects

Just define clean() method in your model like this: (example from the docs link)

def clean(self):
    from django.core.exceptions import ValidationError
    # Don't allow draft entries to have a pub_date.
    if self.status == 'draft' and self.pub_date is not None:
        raise ValidationError('Draft entries may not have a publication date.')
    # Set the pub_date for published items if it hasn't been set already.
    if self.status == 'published' and self.pub_date is None:
        self.pub_date = datetime.datetime.now()