Python FastAPI Development Best Practices Comprehensive guide for building production-ready APIs with FastAPI, async Python, and modern backend development patterns. Project Structure Modular Application Architecture Organize code into logical modules (routers, models, schemas, services) Separate business logic from API logic Example structure: Configuration Management Use Pydantic BaseSettings for environment-based configuration Keep sensitive data in environment variables Implement different configs for development, testing, and production Example: Database Integration SQLAlchemy Async Patterns Use asyncio-compatible database drivers (asyncpg for PostgreSQL) Implement async session management Use select() for queries instead of legacy query() methods Example: Database Models and Relationships Define clear SQLAlchemy models with proper relationships Use appropriate column types and constraints Implement proper indexing for performance Example: Database Migrations Use Alembic for database schema migrations Create meaningful migration messages and version control Test migrations in development before applying to production Example migration workflow: Error Handling and Validation Custom Exception Handling Create custom exception classes for different error types Implement global exception handlers Return consistent error response formats Example: Input Validation Use Pydantic validators for complex validation logic Implement custom validators for business rules Provide clear error messages for validation failures Example: Testing Test Structure Write comprehensive unit tests for all business logic Implement integration tests for API endpoints Use pytest with async support for testing Example: Test Database Management Use separate test databases for isolation Implement database fixtures for test data Clean up test data after each test run Summary Checklist [ ] Use type hints and Pydantic models throughout [ ] Implement async/await for all I/O operations [ ] Structure project with clear separation of concerns [ ] Use dependency injection for shared logic [ ] Implement proper authentication and authorization [ ] Handle errors consistently with custom exceptions [ ] Optimize database queries and implement caching [ ] Write comprehensive tests for all functionality [ ] Use proper security headers and HTTPS [ ] Configure production deployment with Docker [ ] Implement monitoring and logging Follow these practices to build robust, scalable, and maintainable FastAPI applications.

Express Nodejs This document provides comprehensive guidelines for express nodejs development and best practices. Routing & Middleware Route Route definitions and methods Implement proper route definitions and methods Follow best practices for optimal results Route Route parameters and wildcards Implement proper route parameters and wildcards Follow best practices for optimal results Middleware Middleware execution order Implement proper middleware execution order Follow best practices for optimal results Custom Custom middleware development Implement proper custom middleware development Follow best practices for optimal results Third-party Third-party middleware integration Implement proper third-party middleware integration Follow best practices for optimal results Request Handling Body Body parsing (JSON, form data, files) Implement proper body parsing (json, form data, files) Follow best practices for optimal results Query Query string and parameter extraction Implement proper query string and parameter extraction Follow best practices for optimal results Header Header manipulation Implement proper header manipulation Follow best practices for optimal results Cookie Cookie and session management Implement proper cookie and session management Follow best practices for optimal results Request Request validation and sanitization Implement proper request validation and sanitization Follow best practices for optimal results Authentication & Security JWT JWT token authentication Implement proper jwt token authentication Follow best practices for optimal results Session-based Session-based authentication Implement proper session-based authentication Follow best practices for optimal results Password Password hashing and validation Implement proper password hashing and validation Follow best practices for optimal results CORS CORS configuration Implement proper cors configuration Follow best practices for optimal results Security Security middleware (helmet, rate limiting) Implement proper security middleware (helmet, rate limiting) Follow best practices for optimal results Testing Strategies Unit Unit testing with Jest Implement proper unit testing with jest Follow best practices for optimal results Integration Integration testing with Supertest Implement proper integration testing with supertest Follow best practices for optimal results API API endpoint testing Implement proper api endpoint testing Follow best practices for optimal results Mock Mock database operations Implement proper mock database operations Follow best practices for optimal results Test Test environment setup Implement proper test environment setup Follow best practices for optimal results Performance Optimization Response Response compression (gzip) Implement proper response compression (gzip) Follow best practices for optimal results Caching Caching strategies Implement proper caching strategies Follow best practices for optimal results Database Database query optimization Implement proper database query optimization Follow best practices for optimal results Memory Memory leak prevention Implement proper memory leak prevention Follow best practices for optimal results Cluster Cluster mode for scaling Implement proper cluster mode for scaling Follow best practices for optimal results WebSocket Integration Socket.IO Socket.IO implementation Implement proper socket.io implementation Follow best practices for optimal results Real-time Real-time communication Implement proper real-time communication Follow best practices for optimal results WebSocket WebSocket authentication Implement proper websocket authentication Follow best practices for optimal results Room Room and namespace management Implement proper room and namespace management Follow best practices for optimal results Event-driven Event-driven architecture Implement proper event-driven architecture Follow best practices for optimal results Advanced Features Custom Custom middleware development Implement proper custom middleware development Follow best practices for optimal results Plugin Plugin architecture Implement proper plugin architecture Follow best practices for optimal results Microservices Microservices integration Implement proper microservices integration Follow best practices for optimal results API API gateway patterns Implement proper api gateway patterns Follow best practices for optimal results Event-driven Event-driven programming Implement proper event-driven programming Follow best practices for optimal results Development Tools Nodemon Nodemon for development Implement proper nodemon for development Follow best practices for optimal results Debug Debug module for logging Implement proper debug module for logging Follow best practices for optimal results ESLint ESLint and Prettier setup Implement proper eslint and prettier setup Follow best practices for optimal results Hot Hot reload configuration Implement proper hot reload configuration Follow best practices for optimal results API API testing with Postman Implement proper api testing with postman Follow best practices for optimal results Follow these comprehensive guidelines for successful express nodejs implementation.

Golang Microservices This document provides comprehensive guidelines for golang microservices development and best practices. Go Best Practices Use Use interfaces for dependency injection Implement proper use interfaces for dependency injection Follow best practices for optimal results Error Error handling with explicit error returns Implement proper error handling with explicit error returns Follow best practices for optimal results Context Context for request lifecycle and cancellation Implement proper context for request lifecycle and cancellation Follow best practices for optimal results Graceful Graceful shutdown with signal handling Implement proper graceful shutdown with signal handling Follow best practices for optimal results Structured Structured logging with slog or logrus Implement proper structured logging with slog or logrus Follow best practices for optimal results HTTP API Development Use Use Gin or Echo for HTTP frameworks Implement proper use gin or echo for http frameworks Follow best practices for optimal results REST REST API design principles Implement proper rest api design principles Follow best practices for optimal results Middleware Middleware for authentication and logging Implement proper middleware for authentication and logging Follow best practices for optimal results Request Request validation and sanitization Implement proper request validation and sanitization Follow best practices for optimal results OpenAPI/Swagger OpenAPI/Swagger documentation Implement proper openapi/swagger documentation Follow best practices for optimal results Service Communication Synchronous: Synchronous: HTTP/REST and gRPC Implement proper synchronous: http/rest and grpc Follow best practices for optimal results Asynchronous: Asynchronous: Message queues (NATS, RabbitMQ) Implement proper asynchronous: message queues (nats, rabbitmq) Follow best practices for optimal results Event-driven Event-driven architecture patterns Implement proper event-driven architecture patterns Follow best practices for optimal results Circuit Circuit breaker pattern for resilience Implement proper circuit breaker pattern for resilience Follow best practices for optimal results Retry Retry mechanisms with exponential backoff Implement proper retry mechanisms with exponential backoff Follow best practices for optimal results Observability Structured Structured logging Implement proper structured logging Follow best practices for optimal results Metrics Metrics with Prometheus Implement proper metrics with prometheus Follow best practices for optimal results Distributed Distributed tracing with Jaeger Implement proper distributed tracing with jaeger Follow best practices for optimal results Health Health checks and readiness probes Implement proper health checks and readiness probes Follow best practices for optimal results Error Error monitoring and alerting Implement proper error monitoring and alerting Follow best practices for optimal results Deployment Docker Docker containerization Implement proper docker containerization Follow best practices for optimal results Kubernetes Kubernetes deployment manifests Implement proper kubernetes deployment manifests Follow best practices for optimal results Helm Helm charts for configuration Implement proper helm charts for configuration Follow best practices for optimal results CI/CD CI/CD pipelines Implement proper ci/cd pipelines Follow best practices for optimal results Blue-green Blue-green and canary deployments Implement proper blue-green and canary deployments Follow best practices for optimal results Follow these comprehensive guidelines for successful golang microservices implementation.

Golang Web Api This document provides comprehensive guidelines for golang web api development and best practices. Popular Frameworks Gin Gin for high-performance APIs Implement proper gin for high-performance apis Follow best practices for optimal results Echo Echo for minimalist web framework Implement proper echo for minimalist web framework Follow best practices for optimal results Fiber Fiber for Express.js-like experience Implement proper fiber for express.js-like experience Follow best practices for optimal results Chi Chi for lightweight routing Implement proper chi for lightweight routing Follow best practices for optimal results Gorilla Gorilla Mux for flexible routing Implement proper gorilla mux for flexible routing Follow best practices for optimal results Request/Response Handling JSON JSON encoding/decoding with encoding/json Implement proper json encoding/decoding with encoding/json Follow best practices for optimal results Request Request validation with validator package Implement proper request validation with validator package Follow best practices for optimal results Query Query parameter parsing Implement proper query parameter parsing Follow best practices for optimal results Form Form data handling Implement proper form data handling Follow best practices for optimal results File File upload processing Implement proper file upload processing Follow best practices for optimal results Database Integration SQL SQL databases with database/sql Implement proper sql databases with database/sql Follow best practices for optimal results GORM GORM for ORM functionality Implement proper gorm for orm functionality Follow best practices for optimal results Connection Connection pooling and management Implement proper connection pooling and management Follow best practices for optimal results Transaction Transaction handling Implement proper transaction handling Follow best practices for optimal results Migration Migration management Implement proper migration management Follow best practices for optimal results Performance & Optimization HTTP HTTP caching headers Implement proper http caching headers Follow best practices for optimal results Response Response compression Implement proper response compression Follow best practices for optimal results Connection Connection keep-alive Implement proper connection keep-alive Follow best practices for optimal results Load Load balancing considerations Implement proper load balancing considerations Follow best practices for optimal results Profiling Profiling with pprof Implement proper profiling with pprof Follow best practices for optimal results Testing HTTP HTTP handler testing Implement proper http handler testing Follow best practices for optimal results Integration Integration testing with httptest Implement proper integration testing with httptest Follow best practices for optimal results Test Test doubles and mocking Implement proper test doubles and mocking Follow best practices for optimal results Benchmark Benchmark testing Implement proper benchmark testing Follow best practices for optimal results End-to-end End-to-end API testing Implement proper end-to-end api testing Follow best practices for optimal results Summary Checklist [ ] Core principles implemented [ ] Best practices followed [ ] Performance optimized [ ] Security measures in place [ ] Testing strategy implemented [ ] Documentation completed [ ] Monitoring configured [ ] Production deployment ready Follow these comprehensive guidelines for successful golang web api implementation.

Graphql Apollo This document provides comprehensive guidelines for graphql apollo development and best practices. Schema Design Schema-first Schema-first vs code-first approaches Implement proper schema-first vs code-first approaches Follow best practices for optimal results Type Type relationships and connections Implement proper type relationships and connections Follow best practices for optimal results Pagination Pagination patterns (cursor-based, offset) Implement proper pagination patterns (cursor-based, offset) Follow best practices for optimal results Union Union types for polymorphic data Implement proper union types for polymorphic data Follow best practices for optimal results Directive Directive usage for schema enhancement Implement proper directive usage for schema enhancement Follow best practices for optimal results Apollo Server Server Server setup and configuration Implement proper server setup and configuration Follow best practices for optimal results Middleware Middleware integration Implement proper middleware integration Follow best practices for optimal results Plugin Plugin system utilization Implement proper plugin system utilization Follow best practices for optimal results Schema Schema stitching and federation Implement proper schema stitching and federation Follow best practices for optimal results Subscription Subscription implementation with WebSockets Implement proper subscription implementation with websockets Follow best practices for optimal results Authentication & Authorization JWT JWT token validation Implement proper jwt token validation Follow best practices for optimal results Context-based Context-based authentication Implement proper context-based authentication Follow best practices for optimal results Field-level Field-level authorization Implement proper field-level authorization Follow best practices for optimal results Role-based Role-based access control Implement proper role-based access control Follow best practices for optimal results Schema Schema directive authorization Implement proper schema directive authorization Follow best practices for optimal results Caching Apollo Apollo Client InMemoryCache Implement proper apollo client inmemorycache Follow best practices for optimal results Cache Cache policies and fetch policies Implement proper cache policies and fetch policies Follow best practices for optimal results Cache Cache updates after mutations Implement proper cache updates after mutations Follow best practices for optimal results Optimistic Optimistic updates Implement proper optimistic updates Follow best practices for optimal results Cache Cache persistence Implement proper cache persistence Follow best practices for optimal results Performance Optimization Query Query optimization and analysis Implement proper query optimization and analysis Follow best practices for optimal results DataLoader DataLoader for batch loading Implement proper dataloader for batch loading Follow best practices for optimal results Query Query complexity analysis Implement proper query complexity analysis Follow best practices for optimal results Persisted Persisted queries Implement proper persisted queries Follow best practices for optimal results Automatic Automatic persisted queries (APQ) Implement proper automatic persisted queries (apq) Follow best practices for optimal results Real-time Features Subscription Subscription implementation Implement proper subscription implementation Follow best practices for optimal results WebSocket WebSocket transport Implement proper websocket transport Follow best practices for optimal results Real-time Real-time data synchronization Implement proper real-time data synchronization Follow best practices for optimal results Live Live query alternatives Implement proper live query alternatives Follow best practices for optimal results Push Push notification integration Implement proper push notification integration Follow best practices for optimal results Summary Checklist [ ] Core principles implemented [ ] Best practices followed [ ] Performance optimized [ ] Security measures in place [ ] Testing strategy implemented [ ] Documentation completed [ ] Monitoring configured [ ] Production deployment ready Follow these comprehensive guidelines for successful graphql apollo implementation.

Mongodb Advanced This document provides comprehensive guidelines for mongodb advanced development and best practices. Query Operations Find Find operations with complex criteria Implement proper find operations with complex criteria Follow best practices for optimal results Projection Projection to limit returned fields Implement proper projection to limit returned fields Follow best practices for optimal results Sorting Sorting and limiting results Implement proper sorting and limiting results Follow best practices for optimal results Regular Regular expressions for text matching Implement proper regular expressions for text matching Follow best practices for optimal results Geospatial Geospatial queries for location data Implement proper geospatial queries for location data Follow best practices for optimal results Indexing Strategies Single Single field and compound indexes Implement proper single field and compound indexes Follow best practices for optimal results Text Text indexes for full-text search Implement proper text indexes for full-text search Follow best practices for optimal results Geospatial Geospatial indexes (2d, 2dsphere) Implement proper geospatial indexes (2d, 2dsphere) Follow best practices for optimal results Sparse Sparse and partial indexes Implement proper sparse and partial indexes Follow best practices for optimal results Index Index intersection and optimization Implement proper index intersection and optimization Follow best practices for optimal results Data Modeling Patterns Attribute Attribute pattern for varying schemas Implement proper attribute pattern for varying schemas Follow best practices for optimal results Bucket Bucket pattern for time-series data Implement proper bucket pattern for time-series data Follow best practices for optimal results Subset Subset pattern for large documents Implement proper subset pattern for large documents Follow best practices for optimal results Computed Computed pattern for pre-calculated values Implement proper computed pattern for pre-calculated values Follow best practices for optimal results Tree Tree patterns for hierarchical data Implement proper tree patterns for hierarchical data Follow best practices for optimal results Replication Replica Replica set configuration Implement proper replica set configuration Follow best practices for optimal results Primary Primary and secondary nodes Implement proper primary and secondary nodes Follow best practices for optimal results Read Read preference strategies Implement proper read preference strategies Follow best practices for optimal results Automatic Automatic failover Implement proper automatic failover Follow best practices for optimal results Oplog Oplog monitoring Implement proper oplog monitoring Follow best practices for optimal results Security Authentication Authentication mechanisms Implement proper authentication mechanisms Follow best practices for optimal results Role-based Role-based access control (RBAC) Implement proper role-based access control (rbac) Follow best practices for optimal results Field-level Field-level security Implement proper field-level security Follow best practices for optimal results Encryption Encryption at rest and in transit Implement proper encryption at rest and in transit Follow best practices for optimal results Audit Audit logging Implement proper audit logging Follow best practices for optimal results Development Best Practices Connection Connection management Implement proper connection management Follow best practices for optimal results Error Error handling patterns Implement proper error handling patterns Follow best practices for optimal results Data Data validation strategies Implement proper data validation strategies Follow best practices for optimal results Testing Testing with embedded MongoDB Implement proper testing with embedded mongodb Follow best practices for optimal results Schema Schema evolution patterns Implement proper schema evolution patterns Follow best practices for optimal results Summary Checklist [ ] Core principles implemented [ ] Best practices followed [ ] Performance optimized [ ] Security measures in place [ ] Testing strategy implemented [ ] Documentation completed [ ] Monitoring configured [ ] Production deployment ready Follow these comprehensive guidelines for successful mongodb advanced implementation.

Nodejs Microservices This document provides comprehensive guidelines for nodejs microservices development and best practices. Node.js Backend Development Express.js Express.js framework mastery Implement proper express.js framework mastery Follow best practices for optimal results Fastify Fastify for high performance Implement proper fastify for high performance Follow best practices for optimal results Koa.js Koa.js for modern async handling Implement proper koa.js for modern async handling Follow best practices for optimal results Middleware Middleware patterns and composition Implement proper middleware patterns and composition Follow best practices for optimal results Error Error handling and logging Implement proper error handling and logging Follow best practices for optimal results Database Integration MongoDB MongoDB with Mongoose ODM Implement proper mongodb with mongoose odm Follow best practices for optimal results PostgreSQL PostgreSQL with Sequelize/Prisma Implement proper postgresql with sequelize/prisma Follow best practices for optimal results Redis Redis for caching and sessions Implement proper redis for caching and sessions Follow best practices for optimal results Database Database per service pattern Implement proper database per service pattern Follow best practices for optimal results Connection Connection pooling and optimization Implement proper connection pooling and optimization Follow best practices for optimal results Service Communication HTTP/REST HTTP/REST inter-service calls Implement proper http/rest inter-service calls Follow best practices for optimal results Message Message queues (RabbitMQ, Apache Kafka) Implement proper message queues (rabbitmq, apache kafka) Follow best practices for optimal results Event-driven Event-driven architecture Implement proper event-driven architecture Follow best practices for optimal results Circuit Circuit breaker pattern Implement proper circuit breaker pattern Follow best practices for optimal results Service Service discovery mechanisms Implement proper service discovery mechanisms Follow best practices for optimal results Testing Strategies Unit Unit testing with Jest Implement proper unit testing with jest Follow best practices for optimal results Integration Integration testing with Supertest Implement proper integration testing with supertest Follow best practices for optimal results Contract Contract testing with Pact Implement proper contract testing with pact Follow best practices for optimal results Load Load testing with Artillery Implement proper load testing with artillery Follow best practices for optimal results End-to-end End-to-end testing automation Implement proper end-to-end testing automation Follow best practices for optimal results Security Best Practices Input Input validation and sanitization Implement proper input validation and sanitization Follow best practices for optimal results Helmet.js Helmet.js for security headers Implement proper helmet.js for security headers Follow best practices for optimal results CORS CORS configuration Implement proper cors configuration Follow best practices for optimal results SQL SQL injection prevention Implement proper sql injection prevention Follow best practices for optimal results Secrets Secrets management Implement proper secrets management Follow best practices for optimal results Message Patterns Publish-subscribe Publish-subscribe messaging Implement proper publish-subscribe messaging Follow best practices for optimal results Request-reply Request-reply patterns Implement proper request-reply patterns Follow best practices for optimal results Event Event sourcing implementation Implement proper event sourcing implementation Follow best practices for optimal results Saga Saga pattern for transactions Implement proper saga pattern for transactions Follow best practices for optimal results Dead Dead letter queue handling Implement proper dead letter queue handling Follow best practices for optimal results Error Handling Global Global error handling middleware Implement proper global error handling middleware Follow best practices for optimal results Graceful Graceful error responses Implement proper graceful error responses Follow best practices for optimal results Circuit Circuit breaker implementation Implement proper circuit breaker implementation Follow best practices for optimal results Retry Retry mechanisms with exponential backoff Implement proper retry mechanisms with exponential backoff Follow best practices for optimal results Fallback Fallback strategies Implement proper fallback strategies Follow best practices for optimal results Production Readiness Process Process management with PM2 Implement proper process management with pm2 Follow best practices for optimal results Cluster Cluster mode for scalability Implement proper cluster mode for scalability Follow best practices for optimal results Memory Memory and CPU monitoring Implement proper memory and cpu monitoring Follow best practices for optimal results Log Log aggregation Implement proper log aggregation Follow best practices for optimal results Incident Incident response procedures Implement proper incident response procedures Follow best practices for optimal results Follow these comprehensive guidelines for successful nodejs microservices implementation.

Postgresql Advanced This document provides comprehensive guidelines for postgresql advanced development and best practices. Advanced SQL Window Window functions for analytical queries Implement proper window functions for analytical queries Follow best practices for optimal results Common Common Table Expressions (CTEs) Implement proper common table expressions (ctes) Follow best practices for optimal results Recursive Recursive queries Implement proper recursive queries Follow best practices for optimal results JSONB JSONB operations and indexing Implement proper jsonb operations and indexing Follow best practices for optimal results Full-text Full-text search capabilities Implement proper full-text search capabilities Follow best practices for optimal results Performance Optimization Query Query plan analysis with EXPLAIN Implement proper query plan analysis with explain Follow best practices for optimal results Index Index usage and optimization Implement proper index usage and optimization Follow best practices for optimal results Table Table partitioning strategies Implement proper table partitioning strategies Follow best practices for optimal results Connection Connection pooling with PgBouncer Implement proper connection pooling with pgbouncer Follow best practices for optimal results Query Query optimization techniques Implement proper query optimization techniques Follow best practices for optimal results Data Types & Features JSONB JSONB for semi-structured data Implement proper jsonb for semi-structured data Follow best practices for optimal results Arrays Arrays for list data Implement proper arrays for list data Follow best practices for optimal results UUID UUID for unique identifiers Implement proper uuid for unique identifiers Follow best practices for optimal results Geometric Geometric types for spatial data Implement proper geometric types for spatial data Follow best practices for optimal results Custom Custom enumerated types Implement proper custom enumerated types Follow best practices for optimal results Backup & Recovery pg_dump pg_dump for logical backups Implement proper pg_dump for logical backups Follow best practices for optimal results Continuous Continuous archiving with WAL Implement proper continuous archiving with wal Follow best practices for optimal results Point-in-time Point-in-time recovery (PITR) Implement proper point-in-time recovery (pitr) Follow best practices for optimal results Streaming Streaming replication setup Implement proper streaming replication setup Follow best practices for optimal results Backup Backup verification strategies Implement proper backup verification strategies Follow best practices for optimal results High Availability Master-slave Master-slave replication Implement proper master-slave replication Follow best practices for optimal results Streaming Streaming replication Implement proper streaming replication Follow best practices for optimal results Logical Logical replication Implement proper logical replication Follow best practices for optimal results Connection Connection failover Implement proper connection failover Follow best practices for optimal results Load Load balancing strategies Implement proper load balancing strategies Follow best practices for optimal results Advanced Features Materialized Materialized views for performance Implement proper materialized views for performance Follow best practices for optimal results Foreign Foreign data wrappers (FDW) Implement proper foreign data wrappers (fdw) Follow best practices for optimal results Table Table inheritance Implement proper table inheritance Follow best practices for optimal results Exclusion Exclusion constraints Implement proper exclusion constraints Follow best practices for optimal results Extensions Extensions and custom types Implement proper extensions and custom types Follow best practices for optimal results Follow these comprehensive guidelines for successful postgresql advanced implementation.

Ruby Rails This document provides comprehensive guidelines for ruby rails development and best practices. Models & Active Record Active Active Record pattern for data modeling Implement proper active record pattern for data modeling Follow best practices for optimal results Model Model associations (has_many, belongs_to, has_one) Implement proper model associations (has_many, belongs_to, has_one) Follow best practices for optimal results Validations Validations for data integrity Implement proper validations for data integrity Follow best practices for optimal results Callbacks Callbacks for lifecycle events Implement proper callbacks for lifecycle events Follow best practices for optimal results Scopes Scopes for reusable query methods Implement proper scopes for reusable query methods Follow best practices for optimal results Views & Templates ERB ERB templating engine Implement proper erb templating engine Follow best practices for optimal results Partials Partials for code reuse Implement proper partials for code reuse Follow best practices for optimal results Helpers Helpers for view logic Implement proper helpers for view logic Follow best practices for optimal results Layouts Layouts and content_for Implement proper layouts and content_for Follow best practices for optimal results Asset Asset pipeline for CSS/JS management Implement proper asset pipeline for css/js management Follow best practices for optimal results Database Management Active Active Record migrations Implement proper active record migrations Follow best practices for optimal results Database Database schema management Implement proper database schema management Follow best practices for optimal results Seeds Seeds for initial data Implement proper seeds for initial data Follow best practices for optimal results Database Database indexes and constraints Implement proper database indexes and constraints Follow best practices for optimal results Query Query optimization techniques Implement proper query optimization techniques Follow best practices for optimal results Authentication & Authorization Devise Devise for user authentication Implement proper devise for user authentication Follow best practices for optimal results CanCanCan CanCanCan for authorization Implement proper cancancan for authorization Follow best practices for optimal results Pundit Pundit for policy-based authorization Implement proper pundit for policy-based authorization Follow best practices for optimal results Session Session management Implement proper session management Follow best practices for optimal results Password Password security best practices Implement proper password security best practices Follow best practices for optimal results Performance Optimization Query Query optimization and N+1 prevention Implement proper query optimization and n+1 prevention Follow best practices for optimal results Caching Caching strategies (fragment, page, action) Implement proper caching strategies (fragment, page, action) Follow best practices for optimal results Background Background jobs with Sidekiq Implement proper background jobs with sidekiq Follow best practices for optimal results Database Database connection pooling Implement proper database connection pooling Follow best practices for optimal results Asset Asset optimization and CDN usage Implement proper asset optimization and cdn usage Follow best practices for optimal results Deployment Production Production environment configuration Implement proper production environment configuration Follow best practices for optimal results Asset Asset precompilation Implement proper asset precompilation Follow best practices for optimal results Database Database migrations in production Implement proper database migrations in production Follow best practices for optimal results Environment Environment variables and secrets Implement proper environment variables and secrets Follow best practices for optimal results Monitoring Monitoring and logging Implement proper monitoring and logging Follow best practices for optimal results Summary Checklist [ ] Core principles implemented [ ] Best practices followed [ ] Performance optimized [ ] Security measures in place [ ] Testing strategy implemented [ ] Documentation completed [ ] Monitoring configured [ ] Production deployment ready Follow these comprehensive guidelines for successful ruby rails implementation.

Rust Web Actix This document provides comprehensive guidelines for rust web actix development and best practices. Request Handling Route Route definitions with macros Implement proper route definitions with macros Follow best practices for optimal results Path Path parameters extraction Implement proper path parameters extraction Follow best practices for optimal results Query Query parameters parsing Implement proper query parameters parsing Follow best practices for optimal results JSON JSON payload handling with serde Implement proper json payload handling with serde Follow best practices for optimal results Form Form data processing Implement proper form data processing Follow best practices for optimal results Middleware & Services Authentication Authentication middleware Implement proper authentication middleware Follow best practices for optimal results CORS CORS handling Implement proper cors handling Follow best practices for optimal results Logging Logging with env_logger Implement proper logging with env_logger Follow best practices for optimal results Rate Rate limiting Implement proper rate limiting Follow best practices for optimal results Request/response Request/response transformation Implement proper request/response transformation Follow best practices for optimal results Authentication & Security JWT JWT token handling Implement proper jwt token handling Follow best practices for optimal results Session Session management Implement proper session management Follow best practices for optimal results Password Password hashing with argon2 Implement proper password hashing with argon2 Follow best practices for optimal results CSRF CSRF protection Implement proper csrf protection Follow best practices for optimal results Input Input validation and sanitization Implement proper input validation and sanitization Follow best practices for optimal results Testing Unit Unit testing handlers Implement proper unit testing handlers Follow best practices for optimal results Integration Integration testing with test server Implement proper integration testing with test server Follow best practices for optimal results Mock Mock services Implement proper mock services Follow best practices for optimal results Load Load testing Implement proper load testing Follow best practices for optimal results End-to-end End-to-end testing Implement proper end-to-end testing Follow best practices for optimal results Deployment Docker Docker containerization Implement proper docker containerization Follow best practices for optimal results Binary Binary optimization Implement proper binary optimization Follow best practices for optimal results Static Static file serving Implement proper static file serving Follow best practices for optimal results Reverse Reverse proxy configuration Implement proper reverse proxy configuration Follow best practices for optimal results Monitoring Monitoring and health checks Implement proper monitoring and health checks Follow best practices for optimal results API Development RESTful RESTful API design Implement proper restful api design Follow best practices for optimal results OpenAPI OpenAPI documentation Implement proper openapi documentation Follow best practices for optimal results API API versioning Implement proper api versioning Follow best practices for optimal results Content Content negotiation Implement proper content negotiation Follow best practices for optimal results Rate Rate limiting and throttling Implement proper rate limiting and throttling Follow best practices for optimal results Follow these comprehensive guidelines for successful rust web actix implementation.

Django REST Framework Best Practices Comprehensive guide for building robust, scalable REST APIs with Django REST Framework (DRF) and advanced Django patterns. Authentication and Permissions Authentication Strategy Implementation Configure multiple authentication backends Implement JWT authentication with refresh tokens Handle authentication errors gracefully Example authentication setup: Custom Permission Classes Create reusable permission classes Implement object-level permissions Handle complex permission logic Example permission implementations: Rate Limiting and Throttling Implement different throttle rates for different user types Create custom throttle classes Handle throttle exceeded scenarios Example throttling configuration: API Design and Documentation Versioning Strategy Implement API versioning Handle backward compatibility Provide clear migration paths Example versioning implementation: API Documentation with Swagger/OpenAPI Auto-generate API documentation Add detailed endpoint descriptions Include example requests and responses Example documentation setup: Production Deployment Security and Production Settings Configure proper security settings Implement CORS policies Set up proper logging and monitoring Example production configuration: Follow these practices to build robust, scalable, and maintainable REST APIs with Django REST Framework.

Node.js Express API Development Best Practices Comprehensive guide for building robust, scalable, and secure RESTful APIs with Node.js and Express.js. RESTful API Design Resource-Based URL Structure Use nouns for resources, not verbs Implement consistent naming conventions Follow REST principles for HTTP methods Example API structure: HTTP Status Code Standards Use appropriate status codes for different scenarios Implement consistent response formats Handle edge cases with proper status codes Example status code usage: Request Validation and Sanitization Validate all incoming data using schemas Sanitize inputs to prevent injection attacks Provide clear validation error messages Example with Joi validation: Error Handling and Logging Centralized Error Handling Create custom error classes for different error types Implement global error handling middleware Log errors appropriately for debugging Example error handling system: Structured Logging Use proper logging libraries (Winston, Pino) Implement different log levels Structure logs for easy parsing and monitoring Example logging setup: Testing and Quality Assurance API Testing Strategy Write unit tests for business logic Implement integration tests for endpoints Use proper test databases for isolation Example testing setup: Summary Checklist [ ] Implement modular route organization with Express Router [ ] Use proper middleware chain ordering [ ] Handle async operations with proper error catching [ ] Validate and sanitize all inputs [ ] Implement JWT authentication with refresh tokens [ ] Use bcrypt for password hashing [ ] Configure security headers with helmet [ ] Implement rate limiting and CORS [ ] Create centralized error handling [ ] Use structured logging for monitoring [ ] Implement database connection pooling [ ] Add caching for performance optimization [ ] Write comprehensive tests for all endpoints [ ] Configure proper environment variables [ ] Use PM2 for production process management Follow these practices to build secure, scalable, and maintainable Express.js APIs that perform well in production environments.