creating a reference document schema for mongoose and node.js - node.js

Question

hi i am new to mongodb i am learning it and implementing for one of my hobby project which is using node.js ,please help me a schema and query to do the below project.
i have a hospital where each and every patient details are registered at his first visit and for every visit i need to add a visit for that patient by a reference like .
var patientschema=mongoose.schema(
{
objectid:"12345678"
patientname: string,
patientDOB:Date,
Gender:string,
registrationfee:number,
visits:[{objectid:1234},{objectid:5678}]
});
and visit schema is like
var visitschema = mongoose.schema({
objectid:"1234",
patientid:"12345678"
visitdate:date,
reason:string,
consultingdoctor:string
consultingfee:number
});
please provide me a proper schema and and a queries to achieve this from a node.js application.

Answer 1

In your case the two schemas should look like these.
var patientschema=mongoose.schema(
{
patientname: string,
patientDOB:Date,
Gender:string,
registrationfee:number,
visits:[{ type: mongoose.Schema.Types.ObjectId, ref: 'Visit' }]
});
var visitschema = mongoose.schema(
{
patientid:{ type: mongoose.Schema.Types.ObjectId, ref: 'Patient' }
visitdate:date,
reason:string,
consultingdoctor:string
consultingfee:number
});
var Visit = mongoose.model('Visit', visitschema);
var Patient = mongoose.model('Patient', patientschema);
Now let us create new Patient Entry:
var p1 = new Patient({name: 'Some Name', patientDOB : '2016-11-11', Gender : 'male', registrationfee : 123});
Now you can add Visits to this patient.
var v1 = new Visit({patientid : p1._id, ... Fill Other Fields here });
Now when save this visit, thats where it will get interesting
v1.save(function(err, res){
});
Mongoose will internally append v1's ID to your patient Visits Array. You can later search them by.
Patient.find().populate('visits').exec(function(err, res){
// Here the P1 with have array of Visits
});