Build Rails development environment with postgresql on docker

Run this command to start developing rails

You need to install dip gem if you didn't

Create new project

dip rails new . --database=postgresql --force
docker compose build app --no-cache

update your config/database.yml

default: &default
  adapter: postgresql
  encoding: unicode
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: <%= ENV.fetch("POSTGRES_USER") %>
  password: <%= ENV.fetch("POSTGRES_PASSWORD") %>
  host: db

Create your database

dip rails db:create

Run your server

dip dev