sequelize "findbyid" is not a function but apparently "findAll" is

Question

I am getting a very strange problem with sequelize, When I try to call the function findAll it works fine (same for create and destroy), but when I try to call function "findById", it throws "findById is not a function" (same for "FindOne").

//works fine var gammes = models.gamme.findAll().then(function(gammes) {         res.render('admin/gammes/gestion_gamme',{             layout: 'admin/layouts/structure' ,             gammes : gammes,             js: "gammes"         });     });  // throws models.gamme.findById is not a function models.gamme.findById(req.params.id).then(function(gamme) {         gamme.update({             nom: req.body.nom         }).then(function () {             res.redirect("/gammes");         })     }); 

Gamme.js model

module.exports = function (sequelize, DataTypes) {     "use strict";     var gamme = sequelize.define('gamme', {         id_gamme: {             type: DataTypes.INTEGER.UNSIGNED,             autoIncrement: true,             primaryKey: true         },         nom: {             type: DataTypes.STRING,             allowNull: false         }     }, {         classMethods: {},         timestamps: false     });     return gamme; }; 

Answer 1

With Sequelize v5, findById() was replaced by findByPk(). Replace findById using findByPk and everything should work fine. You can find query doc here

Answer 2

the team of sequelize was deleting this function and replced it by a new function is

findByPk

like this

// search for known ids Project.findByPk(123).then(project => {   // project will be an instance of Project and stores the content of the table entry   // with id 123. if such an entry is not defined you will get null })