Why model.find() in mongoose is running before creating the collection? - node.js

Question

I have this task for creating a database with mongoose and do some CRUD operations:
First I created my server.js file for creating a server and connecting a database to the server
My problem is when I run my app for the first time the person.find() result is always empty!!
server.js:
const express = require('express');
const mongoose = require('mongoose');
const personRoute = require('./routes/personRoute')
const app = express();
app.use(express.json());
//Connecting the database to the server
mongoose.connect('mongodb+srv://admin:123456#checkpoint.scbz2.mongodb.net/Checkpoint?retryWrites=true&w=majority',
{
useNewUrlParser: true,
useUnifiedTopology: true,
useFindAndModify: false,
useCreateIndex: true
},
err => {
if(err) throw err
else console.log('Database is connected')
}
);
//Using routes with express Router
app.use(personRoute)
//Creating server on port 5000
app.listen(5000 , err => {
if(err) console.log(err)
else console.log('Server is running on port 5000')
})
personSchema.js:
const mongoose = require('mongoose');
const { Schema } = mongoose;
//Creating a person schema
const personSchema = new Schema({
name : {type : String, required : true},
age : Number,
favoriteFood : [String]
});
//Exporting the person schema
const person = mongoose.model('person', personSchema);
module.exports = person;
personRoute:
const express = require('express');
const router = express.Router()
const person = require('../model/personSchema');
let arrayOfPeople = require('../arrayOfPeople');
//
let exemple = new person({
name : "Mohamed", age : 26, favoriteFood : ['pasta', 'mloukhia', 'jelbena']
});
exemple.save((err,exemple) => {
if (err) return handleError(err);
else console.log('exemple created and saved: ', exemple);
});
//
person.create(arrayOfPeople,(err, data) => {
if (err) return handleError(err);
else console.log('collection created :', data)
})
//
person.find({name : "Mohamed"}, (err, document) => {
if (err) return handleError(err);
else console.log('Find person by name :', document)
});
module.exports = router;
The problem is in personRoute.js because when I run my app I always get the person.find() result empty actually it always runs before saving the exemple/creating the collection here's an image of my problem:
Image problem
Any help will be always appreciated :)