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NestJS Best Practices

NestJS best practices wo recommended patterns, conventions, aur guidelines hain jo NestJS…

Overview

NestJS Best Practices — Quick Facts

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Field: Detail

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Topic: NestJS Best Practices

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Category: Software Engineering / Best…

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Framework: NestJS (Node.js + TypeScript)

Topic 1

Infobox

📚 | Field | Detail | |---|---| | Topic | NestJS Best Practices | | Category | Software…

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Best Practice Categories

💡 | Category | Key Principle | Priority | |---|---|---| | Architecture | Thin controllers,…

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Architecture Best Practices

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Controller sirf request receive…

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Controller me database calls,…

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Controller ka kaam: request parse,…

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Saari business logic services me.…

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Code Organization

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Har feature ek folder me:…

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Shared utilities ek common/ ya…

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Avoid layer-based structure (all…

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Files: kebab-case —…

Topic 5

Validation aur DTOs

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ValidationPipe globally enable…

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DTOs me class-validator decorators…

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class-transformer se data…

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ValidationPipe me whitelist: true…

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Error Handling

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Application-wide exception filter…

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Standard error envelope: {…

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Never expose stack traces ya…

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Business-specific exceptions…

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Security Best Practices

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HTTP security headers…

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NestJS me helmet middleware use…

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Strict CORS configuration. Sirf…

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Wildcard (*) production me avoid.…

Topic 8

Testing Best Practices

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Har service ka unit test.…

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NestJS TestingModule use karo —…

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Business logic thoroughly covered.

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Module level testing. Real…

Topic 9

Performance Best Practices

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Frequently accessed data cache…

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Cache invalidation strategy clear…

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Cache at service level, not…

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Large modules lazy load karo.…

Topic 10

Configuration Management

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Development, staging, production —…

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@nestjs/config with .env files.…

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Never hardcode URLs, credentials,…

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Application startup par config…

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Development Workflow

🎯 `mermaid flowchart TD A[New Feature Request] --> B[Create Feature Module] B --> C[Define…

Topic 12

Anti-Patterns (Avoid These)

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Controller me agar 50 lines ka…

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"Abhi testing me hoon, baad me…

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Database URL, API keys, feature…

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AppModule me sab kuch directly…

Topic 13

Challenges

🔑 1. Discipline Required — Best practices follow karna discipline maangta hai. Shortcuts…

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Benefits

✨ 1. Maintainability — Consistent structure, clean code, clear boundaries — 6 months baad…

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Glossary

🌟 | Term | Meaning | |---|---| | DTO | Data Transfer Object — request/response data shape…

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Disclaimer

🚀 Yeh article Aliens Wiki ke liye likha gaya hai, Hinglish (Roman) me. Yeh informational…

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

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Quick Quiz

Quiz — Question 2

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