Correct MySQL configuration for Ruby on Rails Database.yml file

Question

I have this configuration:

development:
  adapter: mysql2
  encoding: utf8
  database: my_db_name
  username: root
  password: my_password
  host: mysql://12         


        

Answer 1

Use 'utf8mb4' as encoding to cover all unicode (including emojis)

default: &default
  adapter: mysql2
  encoding: utf8mb4
  collation: utf8mb4_bin
  username: <%= ENV.fetch("MYSQL_USERNAME") %>
  password: <%= ENV.fetch("MYSQL_PASSWORD") %>
  host:     <%= ENV.fetch("MYSQL_HOST") %>

(Reference1) (Reference2)