fastapi-backend-guidelines

A FastAPI backend using Domain-Driven Design separates concerns into Router, Service, and Repository layers. This enforces clean boundaries, consistent DTO usage, and robust error handling for scalable apps.

Manage async database sessions in a FastAPI repository pattern by using async/await for all I/O operations with proper session management. The blueprint enforces read and write session separation to maintain clean data boundaries.

Centralized error handling in FastAPI works by mapping domain exceptions to HTTP responses. This approach captures errors consistently across the Service and Repository layers, providing robust API error management.

Validate FastAPI request data using Pydantic DTOs to enforce domain-driven structure and validation rules. DTOs act as Data Transfer Objects that separate internal domain models from external API contracts.

Yes, you can use ULID IDs instead of standard UUIDs in FastAPI ORM models. This architectural blueprint enforces ULID usage for primary keys to ensure sortable and unique identifiers across your database.

Separate read and write sessions in a FastAPI application when building scalable apps with a layered Router-Service-Repository pattern. This separation optimizes database concurrency and enforces strict data consistency boundaries.