Ruby on Rails ActiveRecord Migrations Add a new column with an index
Example
To add a new indexed column email to the users table, run the command:
rails generate migration AddEmailToUsers email:string:index
This will generate the following migration:
class AddEmailToUsers < ActiveRecord::Migration[5.0]
def change
add_column :users, :email, :string
add_index :users, :email
end
end
