Auto increment field in mongoose - node.js

Question

Im trying to create auto increment field in mongoose but i cant create for some reason
This is my app.js
var express = require('express');
var app = express();
var mongoose = require('mongoose');
var Artist = require('./models/artist');
mongoose.connect('mongodb://localhost/auto-increment');
app.get('/', function(req, res){
Artist.create({
name: "artistName",
fpimage: "Cover"
}, function(err, artist){
if(err) {
console.log(err);
} else {
artist.save();
console.log(artist);
res.send('Hi ')
}
});
});
// Set Port
app.set('port', (process.env.PORT || 3000));
// Run Server
app.listen(app.get('port'), function(){
console.log('Server has started on Port: '+app.get('port'));
});
and this is my artist model
var mongoose = require("mongoose");
var autoIncrement = require('mongoose-auto-increment');
var artistSchema = new mongoose.Schema({
name: String,
fpimage: String
});
artistSchema.plugin(autoIncrement, 'Artist');
module.exports = mongoose.model('Artist', artistSchema);
When i run the app, i get following the error message
fn(this, opts);
^
TypeError: fn is not a function
at Schema.plugin (C:\Users\tjesu\Desktop\pidal\auto-increment\node_modules\mongoose\lib\schema.js:1060:3)
at Object.<anonymous> (C:\Users\tjesu\Desktop\pidal\auto-increment\models\artist.js:10:14)
at Module._compile (module.js:541:32)
at Object.Module._extensions..js (module.js:550:10)
at Module.load (module.js:458:32)
at tryModuleLoad (module.js:417:12)
at Function.Module._load (module.js:409:3)
at Module.require (module.js:468:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (C:\Users\tjesu\Desktop\pidal\auto-increment\app.js:4:14)
at Module._compile (module.js:541:32)
at Object.Module._extensions..js (module.js:550:10)
at Module.load (module.js:458:32)
at tryModuleLoad (module.js:417:12)
at Function.Module._load (module.js:409:3)
at Module.runMain (module.js:575:10)
How can i fix this error? What should i do?

Answer 1

From the docs, it looks like you're missing two things:
You need to initialize autoIncrement:
autoIncrement.initialize(mongoose.connection);
You need to change your call to:
artistSchema.plugin(autoIncrement.plugin, 'Artist');

Answer 2

use autoIncrement.plugin instead of autoIncrement in your model
like:
artistSchema.plugin(autoIncrement.plugin, 'Artist');
and need initialize autoIncrement once
var connection = mongoose.createConnection("mongodb://localhost/auto-increment");
autoIncrement.initialize(connection);
and can use get like
app.get('/', function(req, res){
var artist = new Artist({name: "Telmuun",fpimage: "Cover"});
artist.save(function(err, saved) {
if(err) {
console.log(err);
}
else {
res.send('saved');
}
});
});