MongoDB 模型

myuser

{
	"_id": ObjectId(),
 "realm": "",
 "username": "",
 "credentials": "object",
 "challenges": "object",
 "email": "",
 "emailVerified": false,
 "verificationToken": "",
 "status": "",
 "created": "",
 "lastUpdated": "",
 "id": 0,
	"type": 1,
 "name": "",
 "sex": 1,
 "birthday": ISODate("2013-02-22T03:03:37.312Z")
}

student

{
	"_id": ObjectId(),
	"uid": {"$ref": "myuser", "$id": ObjectId()},
 "parents": [
 {"$ref": "parent", "$id": ObjectId()}
 ],
 "updatedAt": ISODate("2013-02-22T03:03:37.312Z"),
 "grades": [
 {
 "subject": {"$ref": "subject", "$id": ObjectId()},
 "grade": 100
 }
 ]
}

teacher

{
 "_id": ObjectId(),
	"uid": {"$ref": "myuser", "$id": ObjectId()},
 "updatedAt": ISODate("2013-02-22T03:03:37.312Z"),
 "activities": [
 {
 "id": ObjectId(),
 "date": ISODate("2013-02-22T03:03:37.312Z"),
 "palce": "",
 "content": ""
 }
 ],
 "notices": [
 {
 "id": ObjectId(),
 "content": ""
 }
 ],
 "homework": [
 {
 "id": ObjectId(),
 "date": ISODate("2013-02-22T03:03:37.312Z"),
 "content": ""
 }
 ],
 "subject": [
 {
 "id": ObjectId(),
 "name": "",
 "teacherName": ""
 }
 ]
}

parent

{
 "_id": ObjectId(),
	"uid": {"$ref": "myuser", "$id": ObjectId()},
 "student": {"$ref": "student", "$id": ObjectId()}
 "updatedAt": ISODate("2013-02-22T03:03:37.312Z"),
 "messages": [
 {
 "id": ObjectId(),
 "title": "",
 "content": "",
 "reply": ""
 }
 ]
}