Create envirement

python3 -m venv <name> ex: python3 -m venv venv

Run virtual envirement

source venv/bin/activate

Insrall fastapi

pip install "fastapi[standard]"

Run server

fastapi dev app/main.py

or

uvicorn main:app uvicorn main:app --reload

API docs

http://127.0.0.1:8000/docs http://127.0.0.1:8000/redoc

Install Postgres

pip install psycopg2

# app/main.py
try:
    conn = psycopg2.connect(
        host="localhost",
        database="fastapi",
        user="postgres",
        password="",
        cursor_factory=RealDictCursor
    )
    cursor = conn.cursor()
    print("Database connection was successful")
except Exception as error:
    print("Connecting to database failed")
    print("Error: ", error)

Steps

1. Create app/main.py
2. Create __init__.py

SQL Alchemy

Using ORM

Install SQL Alchemy

pip install sqlalchemy

Steps

1. Create 'app/database.py'
2. Create 'app/models.py'
3. Create 'app/schemas.py'

Check packages

pip freeze

Validate email

pip install email-validator

Encrypt password

pip install 'passlib[bcrypt]'

pip install --upgrade bcrypt

pip uninstall bcrypt

pip install bcrypt==4.0.1

JWT

pip install 'python-jose[cryptography]'

ENV file

pip install python-dotenv

Using

user.__dict__ == user.first

Migration

pip install alembic

alembic init alembic to init

alembic revision -m 'create notes table' to create migration

alembic upgrade head or alembic upgrade 3f2cb1cd21cdto run migration

alembic downgrade -1 or alembic downgrade 3f2cb1cd21cd to downgrade

alembic current to check status

Requirement

pip freeze > requirements.txt

pip install -r requirements.txt to install

Notes

http://127.0.0.1:8000/docs must be defined api /login with respone key "access_token"

Debugger

import pdb

pdb.set_trace()

# using
vars(user)
dir(user)

Example in app/routers/auth.py

Or we can use Run & Debug configuration in .vscode/launch.json