Attendance collection. It has a teacher and his details and date, teacher has a class which contains his student details and attendance status

Attendance collection

{
  "_id": {
    "$oid": "5e68c7eaa0887971ea6ef54c"
  },
  "professorclass": [
    {
      "_id": {
        "$oid": "5e678d257cd5a55f2188f02f"
      },
      "attendance_status": "SES",
      "role": "student",
      "userType": "StudentUser",
      "email": "student1@gmail.com",
      "subject": "chem"
    },
    {
      "_id": {
        "$oid": "5e679f16ef640474e3fdb572"
      },
      "attendance_status": "SES",
      "role": "student",
      "userType": "StudentUser",
      "email": "student2@gmail.com",
      "subject": "chem"
    }
  ],
  "role": "teacher",
  "userType": "TeacherUser",
  "email": "teacher1@gmail.com",
  "subject": "chem",
  "attendate": {
    "$date": {
      "$numberLong": "1583925226000"
    }
  },
  "__v": {
    "$numberInt": "0"
  }
}