Работа с alembic и БД в docker, вопросы с poetry, linux и общие вопросы про python

Database and alembic

How to autogenerate and apply migrations with alembic when the database runs in a container

services:
  db:
    image: postgres
    ports:
      - "5432:5432"
    environment:
      - POSTGRES_USER=username
      - POSTGRES_PASSWORD=password
      - POSTGRES_DB=database
    networks:
      - app-network
  app:
    build: .
    command: bash -c "cd app/database && alembic upgrade head && cd ../.. && python app/main.py"
    volumes:
      - .:/code
    ports:
      - "5000:5000"
    depends_on:
      - db
    networks:
      - app-network
networks:
  app-network:

Change default postgres port

>export PGHOST=localhost

>export PGPORT=5432

Multiple databases in docker and docker-compose

version: '3.0'

services:

  db:
    image: postgres
    environment:
      - POSTGRES_DB
      - POSTGRES_USER
      - POSTGRES_PASSWORD
    ports:
      - ${POSTGRES_DEV_PORT}:5432
    volumes:
      - app-volume:/var/lib/postgresql/data

  db-test:
    image: postgres
    environment:
      - POSTGRES_DB
      - POSTGRES_USER
      - POSTGRES_PASSWORD
    ports:
      - ${POSTGRES_TEST_PORT}:5432
    # Notice I don't even use a volume here since I don't care to persist test data between runs

volumes:
  app-volume: #

[docker]

Container exited with code 0 when run from docker-compose

#!/bin/sh
# ... do other pre-launch setup ...
# Run the CMD
exec "$@"

Подробное объяснение

[poetry]

Transfer dependency to –dev in poetry

You can move the corresponding line in the pyproject.toml from the [tool.poetry.dependencies] section to [tool.poetry.dev-dependencies] by hand and run poetry lock –no-update afterwards.

You can also poetry add -D dep and poetry remove dep in either order. Just be sure to use the same version constraint. Poetry stops/warns you if you use different constraints as they’d conflict.

[linux]

How to generate a random string

openssl rand -base64 12

openssl rand -hex 12