CODEWITHSUNDEEP
javascriptnode.jsmongoose
Richard Rublev
Richard Rublev

Reputation: 8164

Why is my Mongoose User import invalid? Uncaught TypeError: Assignment to constant variable

My User.js

const mongoose = require('mongoose');
const joigoose = require("joigoose")(mongoose);
const { Joi } = require('celebrate');


var joiUserSchema = Joi.object({
    body: Joi.object().keys({
        username: Joi.string().required(),
        name: Joi.string().required(),
        email: Joi.string().email().required(),
        role: Joi.string().default('admin')
      }), 
      query: {
        token: Joi.string().token().required()
    }
});

var mongooseUserSchema = new mongoose.Schema(joigoose.convert(joiUserSchema));
User = mongoose.model('User', mongooseUserSchema);

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

In my index.js

const {User, joiUserSchema} = require('./User');
console.log(User);
console.log(joiUserSchema);

Both are undefined in terminal. If I try REPL

> const {User} = require('./User');
Uncaught TypeError: Assignment to constant variable.
    at Object.<anonymous> (/home/milenko/pract/joi1/User.js:19:6)
    at Module._compile (internal/modules/cjs/loader.js:1251:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1272:10)

How to debug this? I want to extend User validation model.

Upvotes: 1

Views: 113

Answers (1)

T.J. Crowder
T.J. Crowder

Reputation: 1074008

The second one of these lines overwrites the effect of the first:

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

You're trying to make both of them the one export from the module.

Your import is trying to use properties of an exported object. To match the import, the export should export an object with those named properties:

module.exports = {
    User: mongoose.model('User', mongooseUserSchema),
    joiUserSchema
};

Upvotes: 1

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