In this article, we show how to make a database table field unique in Django. ... If, for example, if we create a database table of Books and make the title field ... you should have an id tag, which is always unique, because it's a primary key.
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django-how-to-use-unique-constraint
PostgreSQL and SQLite partial indexes for Django models. ... Usage. Set up a PartialIndex and insert it into your model's class-based Meta.indexes list: ... With unique=True , this can be used to create unique constraints for a subset of the rows .... In the above example, the database table for the Car model will have a manufacturer_id column. ... By default, Django uses the primary key of the related object. 939c2ea5af