Building a Blog API Tutorial
Learn how to build a complete RESTful Blog API with FastAPI and FasORM. This multi-part tutorial covers database migrations, models with enums and relationships, eager loading, relation counting, pagination, and API route handlers.
Application Architecture & Entity Relationships
The Blog application consists of three core entity models:
User Model
Represents blog authors and commenters. Has a one-to-many relationship with both Post and Comment.
Post Model
Represents blog posts with title, body, status enum (draft, published, archived, in-review), author (user_id), and comments.
Comment Model
Represents comments on posts. Belongs to a Post and a User (author).
Database ER Schema Diagram
| Entity | Fields & Types | Relationships |
|---|---|---|
| User | id (PK), name (String), email (String, Unique), password (String), timestamps |
posts (HasMany Post), comments (HasMany Comment) |
| Post | id (PK), title (String), body (Text), status (Enum), user_id (FK), timestamps |
user (BelongsTo User), comments (HasMany Comment) |
| Comment | id (PK), body (Text), post_id (FK), user_id (FK), timestamps |
post (BelongsTo Post), user (BelongsTo User) |
Tutorial Steps
Step 1: Setup & Migrations →
Initialize the project, configure database connection, and write Blueprint migration files.
Step 2: Domain Models →
Define FasORM models with Enum fields, HasMany, and BelongsTo relationships.
Step 3: FastAPI Routes →
Build FastAPI endpoints with Pydantic validation, eager loading (with_), with_count, and pagination.