GraphQL API Backend

Backend service providing GraphQL API for content management system with reactions, ratings and comments.

Core Features

Shouts (Posts)

• CRUD operations via GraphQL mutations
• Rich filtering and sorting options
• Support for multiple authors and topics
• Rating system with likes/dislikes
• Comments and nested replies
• Bookmarks and following

Reactions System

• ReactionKind types: LIKE, DISLIKE, COMMENT
• Rating calculation for shouts and comments
• User-specific reaction tracking
• Reaction stats and aggregations
• Nested comments support

Authors & Topics

• Author profiles with stats
• Topic categorization and hierarchy
• Following system for authors/topics
• Activity tracking and stats
• Community features

Tech Stack

• (Python)[https://www.python.org/] 3.12+
• GraphQL with Ariadne
• (SQLAlchemy)[https://docs.sqlalchemy.org/en/20/orm/]
• (PostgreSQL)[https://www.postgresql.org/]/(SQLite)[https://www.sqlite.org/] support
• (Starlette)[https://www.starlette.io/] for ASGI server
• (Redis)[https://redis.io/] for caching

Development

Prepare environment:

mkdir .venv
python3.12 -m venv venv
source venv/bin/activate

Run server

First, certifcates are required to run the server.

mkcert -install
mkcert localhost

Then, run the server:

python -m granian main:app --interface asgi --host 0.0.0.0 --port 8000

Useful Commands

# Linting and import sorting
ruff check . --fix --select I 

# Code formatting
ruff format . --line-length=120 

# Run tests
pytest

# Type checking
mypy .

# dev run
python -m granian main:app --interface asgi

Code Style

We use:

• Ruff for linting and import sorting
• Line length: 120 characters
• Python type hints
• Docstrings for public methods

GraphQL Development

Test queries in GraphQL Playground at http://localhost:8000:

# Example query
query GetShout($slug: String) {
  get_shout(slug: $slug) {
    id
    title
    main_author {
      name
    }
  }
}