text: 
  exports.up = function(knex, Promise) {
    return Promise.all([
      knex.schema.table('Messages', function (t) {
        t.integer('report_id').index();
      })
    ]);
  };
  
  exports.down = function(knex, Promise) {
    return Promise.all([
      knex.schema.table('Messages', function (t) {
        t.dropColumn('report_id');
      })
    ]);
  };
  