how can I ref a model that is in another folder? - node.js

Question

for example the nexts schemas are in diferent folders like these:
cr/user
lms/content
this is the schemaContent
user: {
type: Schema.Types.ObjectId,
ref: 'cr/user'
}
How can I ref user from Content?
because when I used cr/user I get an error "Schema hasn't been registered for model"
I need just populate user from content like Content.find().populate({ path: 'users' }) Keeping user in the folder called cr and content in the folder called lms

Answer 1

You are trying to nest documents. Try below approach to nest document.
i will assume the directories cr and lms are inside the directory called demoproject
demoproject/cr/user.js
const mongoose = require("mongoose");
const Schema = mongoose.Schema;
const UserSchema = new Schema({
name:{
type : String,
required: true
}
});
const User = mongoose.model("User",UserSchema);
module.exports = User;
demoproject/lms/content.js
./../cr/user - go back from lms directory and get into cr/user
const mongoose = require("mongoose");
const Schema = mongoose.Schema;
const User = require("./../cr/user");
const ContentSchema = new Schema({
type:{
type : String,
required: true
},
users : [{
type : Schema.Types.ObjectId,
ref : "User"
}]
});
const Content = mongoose.model("Content",ContentSchema);
module.exports = Content;
How can I ref user from Content?
i hope your question is clear now. Keep reading below
Moment of truth
Lets insert data by using these two models.
Create a file to write mongo queries (demoproject/index.js).
As User model is nested into Content model, we need to first save data into User model
Then save data into Content model
Now push data into users object present in Content Model contentdata.users.push(userdata);
Donot forget to save the contentdata after pushing the userdata object into contentdata contentdata.save();
demoproject/index.js
const User = require("./cr/user");
const Content = require("./lms/content");
const userobj = new User({name : "rockyjohnson"});
const contentobj = new Content({type : "gloves"});
userobj.save().then((userdata)=>{
contentobj.save().then((contentdata)=>{
contentdata.users.push(userdata);
contentdata.save();
}).catch((err)=>{
console.log("err while saving contentdata ", err);
})
}).catch((err)=>{
console.log("err while saving userdata ", err);
})
Mongodb output
That is all
Update: answer for the second question
find returns an array object in its promise. i'm able to extract users object present inside Content model here. Below is the query i used to verify
Content.find().then((data)=>{
data.forEach(element => {
console.log("element users ",element.users); // element.users contains all id's stored in the users array
});
}).catch((err)=>{
console.log("err ",err);
})