class RemovePositionDefaults < ActiveRecord::Migration[4.2] def up [Board, CustomField, Enumeration, IssueStatus, Role, Tracker].each do |klass| change_column klass.table_name, :position, :integer, :default => nil end end def down [Board, CustomField, Enumeration, IssueStatus, Role, Tracker].each do |klass| change_column klass.table_name, :position, :integer, :default => 1 end end end