text: 
  exports.up = function(knex, Promise) {
    return knex.schema.createTable("groups", table => {
      table.increments("id").primary();
      table.text("url");
      table.text("name");
    });
  };
  
  exports.down = function(knex, Promise) {
    return knex.schema.dropTableIfExists("groups");
  };
  