TypeError: User is not a constructor

Question

I am trying to save a user to mongodb database using post request as follow, but I got the error TypeError: User is not a function. It\'s a pretty simple set up

Answer 1

Changing the lowercase user variable into uppercase (like below) strangely worked:

const User = mongoose.model('users');

I really thought this was just a best practice but eventually, seems to be mandatory.

Answer 2

You need to create model from your UserSchema and then export it, then you can create new User objects.

// models/user.js
var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var UserSchema = new Schema({
    email: {
        type: String,
        unique: true,
        lowercase: true
    },
    password: String
});

module.exports =  mongoose.model('User', UserSchema)

Answer 3

// models/user.js
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var UserSchema = new Schema({
    email: {
        type: String,
        unique: true,
        lowercase: true
},
    password: String
});

var User = mongoose.model('User', UserSchema)
module.exports =  { User } <-- capital 'U'

Answer 4

I was also facing the same error but this worked for me.

I did change my export file

var User = mongoose.model('User',userSchema);
module.exports = {User};

To

module.exports = mongoose.model('User', userSchema);

Answer 5

Change this var user = new User(); for this var User = new User();