Ruby on Rails: How can i edit database.yml for postgresql?

Question

rails new app=>

The current database.yml is like that=>

# SQLite version 3.x
#   gem install sqlite3
#
#   Ensure the SQLite 3 gem is defined in your         


        

Answer 1

Another way is to have the common values in &default and then have individual values for the other environments, which can be based on environment variables:

default: &default
  adapter:  postgresql
  encoding: unicode
  port:     <%= ENV.fetch("POSTGRESQL_PORT", "5432") %>
  pool:     <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: <%= ENV['POSTGRESQL_USER_NAME'] %>
  password: <%= ENV.fetch("POSTGRESQL_PASSWORD", "myS3cr3tP4ssw0rd") %>
  host:     <%= ENV['POSTGRESQL_HOST'] %>

development:
  <<: *default
  database: <%= ENV['POSTGRESQL_DB'] %>-development
  host: db

test:
  <<: *default
  database: <%= ENV['POSTGRESQL_DB'] %>-test
  host: db

production:
  <<: *default
  database: <%= ENV['POSTGRESQL_DB'] %>

Here all the values can come from environment variables (if you use Docker or Bitbucket Pipelines) or you can have them in your .env files.