I want to get active users items using two collections of mongoDB - node.js

Question

In my project, I have a user and item collection. I have maintained the active_status of users. I want to get active users' items using user and item collection.
Item Collection
const item_model =new mongoose.Schema({
user_id:{
type: mongoose.Schema.Types.ObjectId,
ref: user,
require: true,
},
category: {
type: String,
require: true,
},
name: {
type: String,
require: true,
},
price: {
type: Number,
require: true,
},
stock: {
type: Number,
require: true,
}
}
User Collection
var user = new Schema({
firstName:{
type: String,
require: true
},
lastName:{
type: String,
require: true
},
email:{
type: String,
require: true
},
password:{
type: String,
require: true
},
user_status:{
type: String,
require: true,
default: 1
}
}
can I join these two tables and get active users items?

Answer 1

Your Item Collection should be
const item_model =new mongoose.Schema({
user_id:{
type: mongoose.Schema.Types.ObjectId,
ref: user,
require: true,
},
category: {
type: String,
require: true,
},
name: {
type: String,
require: true,
},
price: {
type: Number,
require: true,
},
stock: {
type: Number,
require: true,
}
}
and your user collection should be
var user = new Schema({
user_id:{
type: mongoose.Schema.Types.ObjectId,
require: true,
},
firstName:{
type: String,
require: true
},
lastName:{
type: String,
require: true
},
email:{
type: String,
require: true
},
password:{
type: String,
require: true
},
user_status:{
type: String,
require: true,
default: 1
}
}
Now lets fetch the active users from the user data model
const _ = require('lodash')
const userQuery = {
user_status: 'active'
}
const activeUsers = await userDataModel.find(userQuery);
//Now extract only user_ids from activeUsers Object
if(activeUsers && activeUsers.length>0){
const user_ids = _.map(activeUsers, 'user_id');
// once you get user_ids for all active users now lets create the query to fetch items for all active users
const itemsQuery = {
user_id: {$in: user_ids}
}
const itmesData = await itemsDataModel.find(itemsQuery);
if(itmesData) {
return itmesData;
} else {
return "Items data not found"
}
} else {
return "Active users not found"
}