FastAPI Query Parameters & Optional Filters - Complete Guide (Class 9) | Code With Hafiz

Master API filtering with FastAPI Query Parameters! Learn how to build flexible endpoints like /products?category=books&limit=10 - just like real-world APIs.

📌 In This Lecture:
✅ Query vs Path Parameters - When to use each
✅ Optional Parameters - Set defaults and make fields non-mandatory
✅ Advanced Filtering - Build search, pagination, and sorting
✅ Auto-Generated Docs - How Swagger UI displays your parameters
🛠 Real-World Uses:
E-commerce filters (/products?on_sale=true)
Pagination (/posts?page=2&per_page=20)
Search (/users?name=John)

Why Watch?
✔ Used by 100% of REST APIs
✔ Required skill for backend roles
✔ Makes your APIs more flexible

🔔 Subscribe for Lecture 10: Request Bodies!
Try it: What query params does YouTube use for video searches? 💬
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