如何在续集上使用实例方法

Question

Can someone help me figure out how to use my sequelize instance methods on my controller?

I wrote my model like that:

const bcrypt = require('bcryptjs');

module.exports = (sequelize, Sequelize) => {
  const Patient = sequelize.define('Patient', {
    email: { 
      type: Sequelize.STRING,
      allowNull: false,
    },
    password : { 
      type: Sequelize.STRING,
      allowNull: false,
    },
  }, {
    classMethods: {
      associate: (models) => {
        // associations can be defined here
      }
    },
    instanceMethods: {
      generateHash: function (password) {
                  return bcrypt.hash(password, 8, function(err, hash){
                      if(err){
                          console.log('error'+err)
                      }else{
                          return hash;
                      }
                  });
              },
      validPassword: function(password) {
          return bcrypt.compareSync(password, this.password);
      }        
    }
  });
  return Patient;
};

but when I launch it on my controller which I made like that

const jwt = require('jsonwebtoken');
const passport = require('passport');
const Patient = require('../models').Patient;

module.exports = {
///
  create(req, res) {
    return Patient
      .create({
        email: req.body.email,
        password: Patient.prototype.generateHash(req.body.password)
      })
      .then(patient => res.status(201).send(patient))
      .catch(error => res.status(400).send(error));
  },
};

I get this error for the request:

TypeError: Cannot read property 'generateHash' of undefined

Answer 1

First of all you should use bcrypt.hashSync() because you want to assign asynchronous function call to the password - it won't work.

generateHash: function(password){
    try {
        return bcrypt.hashSync(password, 8);
    } catch (e) {
        console.log('error: ' + e);
    }
}

In order to use instance method you should do

Patient.build().generateHash(req.body.password);

build() creates new instance of model so then you can run the instance method. Or you can declare the generateHash as a class method so you could run it like that

Patient.generateHash(req.body.password);