Flask + Pydantic + PostgreSQL (Datetime Demo)

A minimal example showing how to handle datetimes consistently in a
Flask + Pydantic + PostgreSQL stack using Docker.

✅ Features:

• Flask 2.3 with a custom JSON provider
• Pydantic models for validation and serialization
• PostgreSQL (timestamptz for proper timezone handling)
• Docker setup (Postgres + API)
• Returns datetimes in ISO 8601 format (RFC-compliant, frontend-friendly)

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🚀 Quick Start

1. Clone the repo

git clone https://github.com/dataLinkGG/flask-pydantic-datetime-demo.git
cd flask-pydantic-datetime-demo

2. Start services

docker compose up --build

• PostgreSQL on localhost:5432
• Flask API on localhost:5000

3. Test the endpoint

Open Postman, curl, or browser:

curl http://localhost:5000/task

You’ll get a JSON response like:

{
  "id": 1,
  "name": "demo",
  "execute_at": "2025-10-01T12:00:00+00:00"
}