text: exports.up = function(knex, Promise) {
    return Promise.all([
      knex.schema.table('Topics', function (t) {
        t.boolean('deleted').defaultTo(false);
      })
    ]);
  };
  
  exports.down = function(knex, Promise) {
    return Promise.all([
      knex.schema.table('Topics', function (t) {
        t.dropColumn('deleted');
      })
    ]);
    knex.schema
  };