Featured
An N+1 query runs one query for a list and one more for every row. Use select_related for foreign keys, prefetch_related for many-to-many and reverse relations, annotate counts in the database, and pin the query count in a test.
Engineering
Field options, the three layers of validation, writable nested serializers, and how to keep list responses fast.
Engineering
Authentication, permissions and throttling are three separate layers in DRF. How to set up each one, with JWT and object-level permissions.
Engineering
Choosing between page number, limit/offset and cursor pagination, and adding filters, search and ordering without slowing the database down.
Engineering
A practical pytest setup for DRF: fixtures, factories, permission tests, query counts and a CI job that runs against PostgreSQL.