What improvements I can make on student attendance NoSQL database? - database

Question

I’m designing a NoSQL database for student attendance system, I want your advices to improve it since I’m new to this field.
I want to query 1. classes for specific student, 2. students on specific class, 3. Attendees for specific class on specific date, 4. attendance and absence count for specific student on specific class.
{
"attendance" : {
"CS 331" : {
"7-3-2019" : {
"2014901001" : true
}
}
},
"class" : {
"class01" : {
"id" : "CS 331",
"name" : "Software Design",
"students" : {
"2014901001" : true
}
}
},
"classEnrollment" : {
"CS 331" : {
"2014901001" : {
"absence" : 0,
"attendant" : 1
}
}
},
"instructor" : {
"instructor01" : {
"id" : "01"
}
},
"instructorEnrollment" : {
"01" : {
"CS 331" : true
}
},
"student" : {
"student01" : {
"id" : "2014901001",
"name" : "Paul Howard"
}
},
"studentEnrollment" : {
"2014901001" : {
"CS 331" : true
}
}
}

Answer 1

This what i will design for such a user requirement
{
"class_collection": {
"documents": [
{
"id": "CS_331_2019_1",
"type": "CS 331",
"name": "Software Design",
"enrolled_instructor": [
"instructor_id_1"
],
"enrolled_students": [
{
"id": "student_id_1",
"absence": 0,
"attendant": 2
},
{
"id": "student_id_2",
"absence": 2,
"attendant": 3
}
]
}
]
},
"class_attendance_collection": {
"documents": [
{
"2019-03-12T18:00:00": {
"class_id": "CS_331_2019_1",
"attended": ["student_id_1"],
"not_attended": ["student_id_2"]
}
},
{
"2019-03-13T16:00:00": {
"class_id": "CS_331_2019_1",
"attended": ["student_id_1","student_id_2"]
}
}
]
},
"student_collection": {
"documents": [
{
"id": "student_id_1",
"name": "name_1"
},
{
"id": "student_id_2",
"name": "name_2"
}
]
},
"instructor_collection": {
"documents": [
{
"id": "instructor_id_1",
"name": "name_1"
},
{
"id": "instructor_id_2",
"name": "name_2"
}
]
}
}
Have fun coding :)