Typorithm learning path
Django REST Framework: practical APIs
Build and test a scoped API through serializers, current list errors, partial updates, model writes, generic views, routers, token revocation, object permissions, session CSRF, combined filters, pagination, query budgets, transactions, quotas, content negotiation, OpenAPI and a capstone. 18 topics with six substantive sections, small tasks and two hints. On a computer, type the example and reconstruct its decisions from memory; the app offers reading and reasoning questions. Real execution uses the owned in-memory lab, verified with Python 3.13, Django 6.1.3 and DRF 3.18.3.
Study with a practical destination
Use the linked lessons in order, complete the lab and explain the decisions without the reference. Select the path and depth that match your role.
Django REST Framework: a scoped and tested API
Before starting: Python foundations, Django basics and HTTP. Type on the computer; use the app for reading and reasoning. Actual framework execution uses the isolated lab.
Build and explain: Build an owned API with explicit value contracts, object authority, CSRF, query scope, atomic writes and observable tests.
- 1. A DRF request is more than a Django request
- 2. Serializer fields define the accepted value contract
- 3. Validate relationships and preserve list error locations
- 4. Partial input and read-only fields have separate meanings
- 5. ModelSerializer does not replace a writable-field policy
- 6. Generic views need a scoped queryset
- 7. Routers distinguish collection and detail actions
- 8. Token parsing must lead to verified identity and revocation
- 9. Scope lists and check individual object access
- 10. Test cookie sessions with CSRF enforcement enabled
- 11. Combine validated filters, search and allowed ordering
- 12. Page the selected scope and name its count honestly
- 13. Measure related-object loading during serialization
- 14. A multi-step write needs an atomic storage boundary
- 15. Test a usage quota with an owned clock and cache
- 16. Negotiate representations and keep failures explicit
- 17. Validate OpenAPI and the actual response together
- 18. Capstone: a scoped, bounded technical-role API
Review evidence: Type the focused example, repair a missing decision and reconstruct it without the reference. Then change one small policy in the working computer-lab baseline and run the acceptance cases. Reading or typing progress is not professional certification.
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Module 1 · 1 lessons
A DRF request is more than a Django request
Follow parsing, dispatch and rendering through an owned API request.
Module 2 · 1 lessons
Serializer fields define the accepted value contract
Separate missing, null, blank, coercion and public representation.
Module 3 · 1 lessons
Validate relationships and preserve list error locations
Check cross-field invariants and current many=True error behavior.
Module 4 · 1 lessons
Partial input and read-only fields have separate meanings
Validate only submitted patch fields while preserving server-controlled state.
Module 5 · 1 lessons
ModelSerializer does not replace a writable-field policy
Persist a validated owned row and assign ownership on the server.
Module 6 · 1 lessons
Generic views need a scoped queryset
Let the framework handle list responses without leaking another owner collection.
Module 7 · 1 lessons
Routers distinguish collection and detail actions
Register a scoped read-only viewset and test its generated routes.
Module 8 · 1 lessons
Token parsing must lead to verified identity and revocation
Exercise DRF token authentication against owned users and the patched proxy deletion path.
Module 9 · 1 lessons
Scope lists and check individual object access
Keep collection visibility, identity and object permissions distinct.
Module 10 · 1 lessons
Test cookie sessions with CSRF enforcement enabled
Use the real session middleware and token instead of bypassing the browser security boundary.
Module 11 · 1 lessons
Combine validated filters, search and allowed ordering
Apply query features to the already scoped collection.
Module 12 · 1 lessons
Page the selected scope and name its count honestly
Bound limit/offset requests without turning page length into collection size.
Module 13 · 1 lessons
Measure related-object loading during serialization
Use select_related deliberately and verify the whole rendered collection query budget.
Module 14 · 1 lessons
A multi-step write needs an atomic storage boundary
Validate first, catch integrity failures outside atomic, and observe rollback.
Module 15 · 1 lessons
Test a usage quota with an owned clock and cache
Verify allow, deny and recovery without sleeps or promises of a security perimeter.
Module 16 · 1 lessons
Negotiate representations and keep failures explicit
Test supported media, malformed encodings and method dispatch on the patched framework.
Module 17 · 1 lessons
Validate OpenAPI and the actual response together
Use the recommended schema tool without mistaking documentation for runtime enforcement.
Module 18 · 1 lessons
Capstone: a scoped, bounded technical-role API
Join authenticated selection, public fields, validated creation and atomic conflict handling.