The classMethods findMyMobile() when called from contoller is giving error - node.js

Question

I have created number of function in the user model which are both instance and class methods. But when i am calling class method findMyMobile() from a controller it is giving 'not a function' error. I tried display it inside the controller but it seems it is undefined there.
model/user.js
const { Sequelize, sequelize } = require('../db/sequelize');
const jwt = require('jsonwebtoken');
const Model = Sequelize.Model;
class User extends Model {}
User.init({
id:{
type: Sequelize.INTEGER,
primaryKey: true,
autoIncrement: true
},
name: {
type: Sequelize.STRING,
allowNull: false
},
mobile_number:{
field:'mobile_number',
type: Sequelize.BIGINT(10),
unique:true,
allowNull: false,
is:/^[1-9]\d{9}$/g,
},
type:{
type: Sequelize.ENUM('0','1','2'),
allowNull: false,
defaultValue: '1',
},
otp:{
type: Sequelize.STRING,
},
createdAt: {
type: Sequelize.DATE,
allowNull: false,
defaultValue: Sequelize.NOW
},
updatedAt: {
type: Sequelize.DATE,
allowNull: false,
defaultValue: Sequelize.NOW
}
},{ sequelize,
modelName:'user',
classMethods:{
findByMobile: function(){
var User = this;
return User.findOne({'mobile_number':data['mobile_number']}).then(user => {
return new Promise((resolve,reject)=>{
if(user)
resolve(user);
else
reject(new Error('No user found'));
});
}).catch(err=>{
return Promise.reject(new Error('Database error'));
})
}
}
})
User.sync();
module.exports = {
User
}
controller/login.js
const { User } = require('../model/user');
const _ = require('lodash');
exports.login = (req, res) => {
const mobile = _.pick(req.body, ['mobile_number']);
console.log(typeof User.findByMobile);
User.findByMobile(mobile).then((user) => {
console.log(user);
}).catch(err => {
var response = {
status: 'failure',
message: err.message
}
res.send(response);
});
};
ERROR:
TypeError: User.findByMobile is not a function

Answer 1

Since sequelize v4 classMethods and instanceMethod are removed from the configuration options : https://sequelize.org/v4/manual/tutorial/upgrade-to-v4.html#config-options
You have two ways to define them
class User extends Model {
//Class Method
static findByMobile() {}
//Instance Method
findByMobile() {}
}
OR
class User extends Model { }
//Class Method
User.findByMobile = function() {}
//Instance Method
User.prototype.findByMobile = function() {}

Answer 2

I think you have the export wrong. See this example for reference.
module.exports = {
getName: () => {
return 'Jim';
},
getLocation: () => {
return 'Munich';
},
dob: '12.01.1982',
};
Then on the import file:
const { getName, dob } = require('./user');
console.log(
`${getName()} was born on ${dob}.`
);
What I do suggest is export the function itself. See link below for ref:
What is the purpose of Node.js module.exports and how do you use it?