Ruby on Rails: How can I edit database.yml for postgresql? - ruby-on-rails

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 Gemfile
# gem 'sqlite3'
development:
adapter: sqlite3
database: db/development.sqlite3
pool: 5
timeout: 5000
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
adapter: sqlite3
database: db/test.sqlite3
pool: 5
timeout: 5000
production:
adapter: sqlite3
database: db/production.sqlite3
pool: 5
timeout: 5000
I need to edit this for postgresql database.
How can I do this?

Answer 1

Simply:
development:
adapter: postgresql
encoding: unicode
database: blog_development
pool: 5
username: blog
password:
host: localhost
Source: Configuring Rails Applications

Answer 2

development:
adapter: postgresql
encoding: utf8
database: name
username: hading
password: my_db_password
pool: 5 # not mandatory
timeout: 5000 # not mandatory
host: localhost
port: your postgresql port number (5432 or 5433)

Answer 3

As Zabba said it's
development:
adapter: postgresql
encoding: unicode
database: blog_development
pool: 5
username: blog
password:
As mentioned in the Configuring Rails Applications. But you might want an additional min_messages: WARNING, to get rid of the nasty NOTICE messages postgresql gives you during a migration. So my database.yml entry looks like this
development:
adapter: postgresql
encoding: unicode
database: blog_development
pool: 5
username: blog
password:
min_messages: WARNING

Answer 4

You might be interested in generating new app with postgres default:
rails new myapp --database=postgresql
as mentioned here: https://devcenter.heroku.com/articles/getting-started-with-rails4

Answer 5

development:
adapter: postgresql
encoding: utf8
database: name
username: hading
password: my_db_password
host: localhost # not mandatory
pool: 5 # not mandatory
timeout: 5000 # not mandatory

Answer 6

Simply use
rails new app_name --database=postgresql
or if existing application try
development:
adapter: postgresql
encoding: unicode
database: app_dev
pool: 5
username: username
password: password
host: localhost

Answer 7

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.