gitlab-org--gitlab-foss/db/migrate/20160725083350_add_external_url_to_enviroments.rb

class AddExternalUrlToEnviroments < ActiveRecord::Migration[4.2]
  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false

  def change
    add_column(:environments, :external_url, :string)
  end
end
Add version 4.2 to all existing migrations DB schema generated by a migration may look different in rails 4 and 5 (because rails 5 may use different default values). For this reason it's important to explicitly set for which rails version a migration was written for. See https://stackoverflow.com/questions/35929869/activerecordmigration-deprecation-warning-asks-for-rails-version-but-im-no/35930912#35930912 2018-11-13 02:27:31 -05:00			`class AddExternalUrlToEnviroments < ActiveRecord::Migration[4.2]`
Add an URL field to Environments This MR adds a string (thus max 255 chars) field to the enviroments table to expose it later in other features. 2016-07-26 03:35:47 -04:00			`include Gitlab::Database::MigrationHelpers`

			`DOWNTIME = false`

			`def change`
			`add_column(:environments, :external_url, :string)`
			`end`
			`end`