如何在Node.js（express）上返回由{}而不是[]包围的json，从而使用knex和postgresql返回查询结果

如果我对我的node.js（EXPRESS）API curl发出了curl请求，则会http://127.0.0.1:3000/api/events/user/id/1得到以下结果：

[{"id":"1","name":"casamiento 1","description":"el casamiento del tio claudio","mode_id":1,"initial_date":"2016-05-28T22:14:57.000Z","end_date":"2016-05-28T22:14:58.000Z","state_id":1,"user_id":"1","location":"0101000020E61000000000000000805BC00000000000003E40"},{"id":"2","name":"casamiento 2","description":"el casamiento del tio claudio 2","mode_id":1,"initial_date":"2016-05-28T22:14:57.000Z","end_date":"2016-05-28T22:14:58.000Z","state_id":1,"user_id":"1","location":"0101000020E61000000000000000405BC00000000000003D40"},{"id":"3","name":"fiesta del sandwich de miga","description":"Nos juntamos a comer sandwiches de miga hasta reventar","mode_id":1,"initial_date":"2016-05-28T22:15:58.000Z","end_date":"2016-05-28T22:15:58.000Z","state_id":1,"user_id":"1","location":"0101000020E610000000000000000000000000000000804840"}]

我需要将输出用大括号括起来，例如：

 {{"id":"1","name":"casamiento 1","description":"el casamiento del tio claudio","mode_id":1,"initial_date":"2016-05-28T22:14:57.000Z","end_date":"2016-05-28T22:14:58.000Z","state_id":1,"user_id":"1","location":"0101000020E61000000000000000805BC00000000000003E40"},{"id":"2","name":"casamiento 2","description":"el casamiento del tio claudio 2","mode_id":1,"initial_date":"2016-05-28T22:14:57.000Z","end_date":"2016-05-28T22:14:58.000Z","state_id":1,"user_id":"1","location":"0101000020E61000000000000000405BC00000000000003D40"},{"id":"3","name":"fiesta del sandwich de miga","description":"Nos juntamos a comer sandwiches de miga hasta reventar","mode_id":1,"initial_date":"2016-05-28T22:15:58.000Z","end_date":"2016-05-28T22:15:58.000Z","state_id":1,"user_id":"1","location":"0101000020E610000000000000000000000000000000804840"}}

我的模型“事件”文件是这样的，它使查询进入knex，然后返回结果：

var express = require('express');
var router = express.Router();
var Promise = require("bluebird");
var connectionString = 'postgres://postgres:postgres@localhost:5432/flock';
var knex = require('knex')({
  client: 'pg',
  connection: connectionString,
  searchPath: 'knex,public'
});

//Get all events from a particular user
exports.getUserEvents=function(id_user){



    console.log("Retrieving data from id_user: "+id_user);

    var promise1 = Promise.try(function () {
    return knex('events')
      .select('*')
      .where('user_id', id_user);
     });

    var promise2=promise1.then(function (rows) { // this creates a new promise, and the promise created here is what gets returned to the caller
      console.log('Returning '+rows.length+' rows from the user with id '+id_user);
      return rows;

    });

    return promise2;
}

我的路由器文件调用模型文件函数getUserEvents，就像这样：

var express = require('express');
var router = express.Router();
var Event=require('../models/event');


//get all events from a user

router.get('/user/id/:id_user', function(req, res, next) {

   var id_user= req.params.id_user;

   var promise = Event.getUserEvents(id_user);

    promise.then(function (result) {
     console.log('Sending response');
     return res.json(result);  //<---this line builds the JSON response
   });

   promise.catch(function (err) {


     return res.sendStatus(500); 

   });

});




module.exports = router

我的问题是，如何发送由{}而不是像现在返回的[]包围的json对象列表？非常感谢你

编辑：这解决了我的问题，最终格式为{“ rows”：[{row1}，{row2}，etc]}

exports.getUserEvents=function(id_user){



    console.log("Retrieving data from id_user: "+id_user);

    var promise1 = Promise.try(function () {
    return knex('events')
      .select('*')
      .where('user_id', id_user);
     });

    var promise2=promise1.then(function (rows) { // this creates a new promise, and the promise created here is what gets returned to the caller
      console.log('Returning '+rows.length+' events from the user with id '+id_user);
      return {rows};//<----This solved the issue

    });

    return promise2; }