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FastAPI Best Practices

FastAPI best practices wo proven patterns, conventions, aur guidelines hain jo developers ko…

Overview

FastAPI Best Practices — Quick Facts

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Property: Detail

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Full Name: FastAPI Best Practices

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Category: Software Engineering, API…

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Applies To: FastAPI applications (REST APIs,…

Topic 1

Categories Overview

📚 | Category | Focus Area | Impact | |---|---|---| | Project Structure | Code organization,…

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Project Structure

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Single main.py + separate…

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Acceptable for prototypes aur…

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Router-based organization

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app/routers/users.py,…

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Pydantic Models & Validation

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Request model alag (kya user…

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Response model alag (kya user ko…

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Database model alag (SQLAlchemy)

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Kabhi bhi database model directly…

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Dependency Injection

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Yield dependency se DB session…

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Har request ki apni session honi…

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Session scope = request scope

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Reusable auth dependency banao…

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Error Handling

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Application-specific exceptions…

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Custom exception handler register…

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Generic 500 errors se meaningful…

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Har error response same structure:

Topic 6

Security Best Practices

✨ | Practice | Description | Risk if Ignored | |---|---|---| | JWT with short expiry |…

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Performance Optimization

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I/O-bound operations (DB queries,…

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CPU-bound operations (data…

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Rule: agar async DB driver…

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Database connection pool configure…

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Testing

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Service layer independently test…

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Dependencies mock karo

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Pydantic models validate karo

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TestClient se endpoints test karo

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Common Mistakes

📚 | Mistake | Problem | Solution | |---|---|---| | Business logic in routes | Fat…

Topic 10

Development Workflow

💡 `mermaid flowchart TD Design[Design API Contract] --> Schema[Define Pydantic Schemas]…

Topic 11

Deployment

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Development: uvicorn app.main:app…

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Production: gunicorn app.main:app…

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Workers = 2 × CPU cores + 1…

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Multi-stage build use karo…

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

FastAPI Best Practices ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

FastAPI Best Practices ka 'Full Name' kya hai?

Complete! 🎉

FastAPI Best Practices Complete!

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