gitlab-org--gitlab-foss/db/migrate/20170519102115_add_promethe...

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

  disable_ddl_transaction!

  DOWNTIME = false

  def up
    add_column_with_default(:application_settings, :prometheus_metrics_enabled, :boolean,
                            default: false, allow_null: false)
  end

  def down
    remove_column(:application_settings, :prometheus_metrics_enabled)
  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 07:27:31 +00:00			`class AddPrometheusSettingsToMetricsSettings < ActiveRecord::Migration[4.2]`
Add Prometheus metrics configuration + Cleanup Gemfile 2017-05-19 13:10:15 +00:00			`include Gitlab::Database::MigrationHelpers`
Make login_counter instance variable instead of class one. + remove unecessarey require + fix small formatiing issues 2017-05-23 14:23:43 +00:00
Add Prometheus metrics configuration + Cleanup Gemfile 2017-05-19 13:10:15 +00:00			`disable_ddl_transaction!`

Mark migration as requiring no downtime + Add spaces for four phases approach + fix InfluxDB rename 2017-05-23 14:09:00 +00:00			`DOWNTIME = false`

Add Prometheus metrics configuration + Cleanup Gemfile 2017-05-19 13:10:15 +00:00			`def up`
			`add_column_with_default(:application_settings, :prometheus_metrics_enabled, :boolean,`
			`default: false, allow_null: false)`
			`end`

			`def down`
			`remove_column(:application_settings, :prometheus_metrics_enabled)`
			`end`
			`end`