gitlab-org--gitlab-foss/db/migrate/20181014203236_create_cluster_groups.rb

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# frozen_string_literal: true
class CreateClusterGroups < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
def change
create_table :cluster_groups do |t|
t.references :cluster, null: false, foreign_key: { on_delete: :cascade }
t.references :group, null: false, index: true
t.index [:cluster_id, :group_id], unique: true
t.foreign_key :namespaces, column: :group_id, on_delete: :cascade
end
end
end