Attribute des untergeordneten Objekts abrufen

Question

Mein Code ist wie folgt. Mein Ziel ist es, den Vornamen des Schülers aus dem unten angegebenen Funktionsobjekt abzurufen. Ich habe versucht JSON.stringify und 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); 
     } 
    } 
}); 

Und hier sind die Ergebnisse für console.log(item.StudentRelation); von oben

{ [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' } 

Funktion Objekt, das ich Schleife versuche durch

[ { 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 } } ] 

Answer 1

Sie haben Verwenden Sie toJSON, um die zurückgegebene Modellinstanz mit verwandten Elementen in ein einfaches JSON-Objekt zu konvertieren.

Answer 2

Die obige Antwort von Stringfy wird funktionieren, aber das ist ein Hack.

Dies ist der richtige Weg Loopback

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