Javascript 检索子级对象的属性

我的代码如下。我的目标是从下面给出的函数对象中检索学生的名字。我确实尝试了JSON.Stringify和JSON.Parse

EnrolledSessions.find({
    where: {
        aproval_status: 'pending',
        tutor_id: tutorId
    },
    include: {
        relation:'StudentRelation'
    }
},
function (err, sessions) {
    if (err) cb(err);
    if (!err) {
        for(var i in sessions) {
            var item = sessions[i];
            console.log(item.StudentRelation);
        }
    }
});

下面是

console.log（item.StudentRelation）的结果从上面开始

{ [Function: bound ]
  getAsync: [Function: bound ]
  update: [Function: bound ],
  destroy: [Function: bound ],
  create: [Function: bound ],
  build: [Function: bound ],
  _targetClass: 'erudoUser' }
{ [Function: bound ]
  getAsync: [Function: bound ]
  update: [Function: bound ],
  destroy: [Function: bound ],
  create: [Function: bound ],
  build: [Function: bound ],
  _targetClass: 'erudoUser' }
{ [Function: bound ]
  getAsync: [Function: bound ]
  update: [Function: bound ],
  destroy: [Function: bound ],
  create: [Function: bound ],
  build: [Function: bound ],
  _targetClass: 'erudoUser' }
{ [Function: bound ]
  getAsync: [Function: bound ]
  update: [Function: bound ],
  destroy: [Function: bound ],
  create: [Function: bound ],
  build: [Function: bound ],
  _targetClass: 'erudoUser' }  

我试图循环通过的函数对象

[ { coursesession_id: 574fc6baa09d9bc4050b974e,
        student_id: 574fbf10179281fc15c5db37,
        tutor_id: 574fbff2179281fc15c5db3d,
        aproval_status: 'pending',
        start_date: Thu Jun 02 2016 11:00:00 GMT+0530 (India Standard Time),
        duration: '06:00',
        session_type: 'One To One',
        enteredtopic_name: 'addition',
        payment_status: 'paid',
        course_completed: false,
        TxnId: 'IKGqrpI6IHnxIFEJsFt53EIqw',
        id: 574fc6baa09d9bc4050b974f,
        StudentRelation:
         { user_type: 'student',
           firstname: 'Student',
           lastname: 'Ps',
           active_status: true,
           email: 'sikha.p91@gmail.com',
           grade: '574fbeb2179281fc15c5db34',
           syllabus: '574fbea9179281fc15c5db33',
           mobile: '8157897518',
           place: 'kannru',
           password: '$2a$10$YIUVCclA6.vBeePZuMY7uu.6lYr..fQD4o9dSY7uF9FmgkTWAqq3i',

           emailVerified: true,
           id: 574fbf10179281fc15c5db37 } },
      { coursesession_id: 574fde1dc59f447c1235007b,
        student_id: 574fbf10179281fc15c5db37,
        tutor_id: 574fbff2179281fc15c5db3d,
        aproval_status: 'pending',
        start_date: Mon Jun 13 2016 09:00:00 GMT+0530 (India Standard Time),
        duration: '01:00',
        session_type: 'One To One',
        enteredtopic_name: 'integration',
        payment_status: 'paid',
        course_completed: false,
        TxnId: 'KpDGHtLwIK6D3zIICtIGoL46p',
        id: 574fde1dc59f447c1235007c,
        StudentRelation:
         { user_type: 'student',
           firstname: 'Student',
           lastname: 'Ps',
           active_status: true,
           email: 'sikha.p91@gmail.com',
           grade: '574fbeb2179281fc15c5db34',
           syllabus: '574fbea9179281fc15c5db33',
           mobile: '8157897518',
           place: 'kannru',
           password: '$2a$10$YIUVCclA6.vBeePZuMY7uu.6lYr..fQD4o9dSY7uF9FmgkTWAqq3i',

           emailVerified: true,
           id: 574fbf10179281fc15c5db37 } },
      { coursesession_id: 57511d25388d2150161559de,
        student_id: 574fbf10179281fc15c5db37,
        tutor_id: 574fbff2179281fc15c5db3d,
        aproval_status: 'pending',
        start_date: Fri Jun 03 2016 09:00:00 GMT+0530 (India Standard Time),
        duration: '06:00',
        session_type: 'One To One',
        enteredtopic_name: 'multiplication',
        payment_status: 'paid',
        course_completed: false,
        TxnId: 'voyn9oqyG14ItzzwqHI4GxM1o',
        id: 57511d25388d2150161559df,
        StudentRelation:
         { user_type: 'student',
           firstname: 'Student',
           lastname: 'Ps',
           active_status: true,
           email: 'sikha.p91@gmail.com',
           grade: '574fbeb2179281fc15c5db34',
           syllabus: '574fbea9179281fc15c5db33',
           mobile: '8157897518',
           place: 'kannru',
           password: '$2a$10$YIUVCclA6.vBeePZuMY7uu.6lYr..fQD4o9dSY7uF9FmgkTWAqq3i',

           emailVerified: true,
           id: 574fbf10179281fc15c5db37 } },
      { coursesession_id: 57511d25388d2150161559de,
        student_id: 574fbf10179281fc15c5db37,
        tutor_id: 574fbff2179281fc15c5db3d,
        aproval_status: 'pending',
        start_date: Sat Jun 04 2016 09:00:00 GMT+0530 (India Standard Time),
        duration: '06:00',
        session_type: 'One To One',
        enteredtopic_name: 'multiplication',
        payment_status: 'paid',
        course_completed: false,
        TxnId: 'voyn9oqyG14ItzzwqHI4GxM1o',
        id: 57511d25388d2150161559e0,
        StudentRelation:
         { user_type: 'student',
           firstname: 'Student',
           lastname: 'Ps',
           active_status: true,
           email: 'sikha.p91@gmail.com',
           grade: '574fbeb2179281fc15c5db34',
           syllabus: '574fbea9179281fc15c5db33',
           mobile: '8157897518',
           place: 'kannru',
           password: '$2a$10$YIUVCclA6.vBeePZuMY7uu.6lYr..fQD4o9dSY7uF9FmgkTWAqq3i',

           emailVerified: true,
           id: 574fbf10179281fc15c5db37 } } ]

您必须使用将返回的模型实例及其相关项转换为普通的JSON对象。
上面的Stringfy答案将起作用，但这是一种攻击

这是正确的回送方式

   let info = item.getAsync().then((res) => cb(null,res)); 

打印console.log（会话）时会得到什么；我也有同样的问题，我最终不得不完全按照伊万的建议去做，而且效果很好。我对这个解决方案不太满意，因为它可以进行大量的中间数据处理，但至少它是有效的。