db/migrate/20201202003042_add_epic_board_positions.rb


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# frozen_string_literal: true

class AddEpicBoardPositions < ActiveRecord::Migration[6.0]
  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false

  def up
    with_lock_retries do
      create_table :boards_epic_board_positions do |t|
        t.references :epic_board, foreign_key: { to_table: :boards_epic_boards, on_delete: :cascade }, null: false, index: false
        t.references :epic, foreign_key: { on_delete: :cascade }, null: false, index: true
        t.integer :relative_position

        t.timestamps_with_timezone null: false

        t.index [:epic_board_id, :epic_id], unique: true, name: :index_boards_epic_board_positions_on_epic_board_id_and_epic_id
      end
    end
  end

  def down
    with_lock_retries do
      drop_table :boards_epic_board_positions
    end
  end
end