I'm new in node.
I'm trying to add Sequelize in my simple application with cosign.
config/db.js
var Sequelize = require('sequelize');
var sequelize = new Sequelize('test', 'root', '', {
host: 'localhost',
dialect: 'mysql',
pool: {
max: 5,
min: 0,
idle: 10000
}
});
module.exports = function () {
return sequelize
}
model/user.js
var Sequelize = require('sequelize');
module.exports = function(application, req, res){
var User = sequelize.define('user', {
username: {
type: Sequelize.STRING,
}
}, {
freezeTableName: true // Model tableName will be the same as the model name
});
User.create({ username: 'fnord'})
.then(function() {
console.log('criado!');
})
}
config/server.js
...
consign()
.include('app/routes')
.then('config/db.js')
.then('app/models')
.then('app/controllers')
.into(app);
module.exports = app;
I'm getting the error sequelize is not defined´ onvar User = sequelize.define('user', {`
What I'm doing wrong?
Create an index.js file inside your moldes folder like this:
"use strict";
var fs = require("fs");
var path = require("path");
var Sequelize = require("sequelize");
var sequelize = new Sequelize(global.config.dbConfig.name, global.config.dbConfig.user, global.config.dbConfig.password, {
host: global.config.dbConfig.host,
port: global.config.dbConfig.port,
pool: false
});
var db = {};
fs.readdirSync(__dirname)
.filter(function(file) {
return (file.indexOf(".") !== 0) && (file !== "index.js");
})
.forEach(function(file) {
var model = sequelize.import(path.join(__dirname, file));
db[model.name] = model;
});
Object.keys(db).forEach(function(modelName) {
if ("associate" in db[modelName]) {
db[modelName].associate(db);
}
});
db.sequelize = sequelize;
module.exports = db;
and in your user.js do something like this:
module.exports = function(sequelize, DataTypes) {
var User = sequelize.define("User", {
username: {
type: DataTypes.STRING
},
{
freezeTableName: true // Model tableName will be the same as the model name
}
});
return User;
}
http://docs.sequelizejs.com/en/1.7.0/articles/express/
You should require sequelize instance into user model
config/db.js
module.exports = sequelize;
model/user.js
var Sequelize = require('sequelize');
var sequelize = require('../config/db.js'); //sequelize instance
module.exports = function(application, req, res){
var User = sequelize.define('user', {
...
The Sequelize-CLI is a very useful tool for projects that use Sequelize. When you download it
npm install -g sequelize-cli
You can then run
sequelize init
The above command will go and write out a few folders for you including a models folder that has the index file that Ricardo created above. This gives some really cool environment configuration as well. Within the new models folder, you can create a new file with your object with the syntax...
module.exports = function(sequelize, DataTypes) {
var User = sequelize.define("User", {
username: {
type: DataTypes.STRING
},
{
freezeTableName: true // Model tableName will be the same as the model name
}
});
return User;
}
While I do like this as a tool. It is key here to notice that Sequelize will go and look for the first argument to the define() method. So we could just write
module.exports = function(sequelize, DataType){
return sequelize.define("User", {
username: {
type: DataTypes.STRING
},
{
freezeTableName: true // Model tableName will be the same as the model name
}
});
Related
I am new to node js environment and currently I am practicing a crud applicaiton
I am using sequelize as ORM and I have used the mvc structure
npm install --save sequelize
$ npm install --save pg pg-hstore
I am using sequelize cli
npm install --save-dev sequelize-cli
npx sequelize-cli init
It is my migration
'use strict';
module.exports = {
up: async (queryInterface, Sequelize) => {
await queryInterface.createTable('Books', {
id: {
allowNull: false,
autoIncrement: true,
primaryKey: true,
type: Sequelize.INTEGER
},
firstName: {
type: Sequelize.STRING
},
lastName: {
type: Sequelize.STRING
},
email: {
type: Sequelize.STRING
},
createdAt: {
allowNull: false,
type: Sequelize.DATE
},
updatedAt: {
allowNull: false,
type: Sequelize.DATE
}
});
},
down: async (queryInterface, Sequelize) => {
await queryInterface.dropTable('Books');
}
};
My Model:
'use strict';
const {
Model
} = require('sequelize');
module.exports = (sequelize, DataTypes) => {
class Books extends Model {
/**
* Helper method for defining associations.
* This method is not a part of Sequelize lifecycle.
* The `models/index` file will call this method automatically.
*/
static associate(models) {
// define association here
}
};
Books.init({
firstName: DataTypes.STRING,
lastName: DataTypes.STRING,
email: DataTypes.STRING
}, {
sequelize,
modelName: 'Books',
});
return Books;
};
MY Controller:
exports.allBooks = (req,res)=>{
const bookme = Books(**how to pass sequelize**,**how to pass sequelize datatype**)
var booksJSON = bookme.findAll()
res.json(booksJSON)
console.log(JSON.stringify(booksJSON))
}
I am getting the empty response if I pass the datatypes customly by creating a connection manually to database with sequelize and passing that sequelize to the books models
I think that my mistake is in passing these parameters. What and how shoudld I pass to the Books model
I am importing the books model as follows in my controller:
const Books = require('../models/books.js');
also when i ran the bootstraping that created migrations,models,seeding folders it also created a index.js file in models folder
I have tried passing that too in the parameter to Books model but It gave error
index.js in models folder created by sequelize cli package itself
'use strict';
const fs = require('fs');
const path = require('path');
const Sequelize = require('sequelize');
const basename = path.basename(__filename);
const env = process.env.NODE_ENV || 'development';
const config = require(__dirname + '/../config/config.json')[env];
const db = {};
let sequelize;
if (config.use_env_variable) {
sequelize = new Sequelize(process.env[config.use_env_variable], config);
} else {
sequelize = new Sequelize(config.database, config.username, config.password, config);
}
fs
.readdirSync(__dirname)
.filter(file => {
return (file.indexOf('.') !== 0) && (file !== basename) && (file.slice(-3) === '.js');
})
.forEach(file => {
const model = require(path.join(__dirname, file))(sequelize, Sequelize.DataTypes);
db[model.name] = model;
});
Object.keys(db).forEach(modelName => {
if (db[modelName].associate) {
db[modelName].associate(db);
}
});
db.sequelize = sequelize;
db.Sequelize = Sequelize;
module.exports = db;
The error I got when I try to pass this db from index.js to Books model in my controller is:
const model = require(path.join(__dirname, file))(sequelize, Sequelize.DataTypes);
^
TypeError: Class constructor model cannot be invoked without 'new'
What should I pass to the parameter and from where?
I am getting response by using aysnc and await. I used second parameter by importing directly from the package
const Sequelize = require('sequelize')
and for first parameter I used the manually created connection.
but it still doesn't clears my concern of actually what parameters were to pass
I am using Express.js with sequelize
I am trying to get data from table but findALL() method not working
Here , I am sharing my models & controller file
checkout_product model
module.exports = function (sequelize, DataTypes) {
var Checkout_product = sequelize.define(
"Checkout_products",
{
name: {
type: DataTypes.STRING
},
ptice: {
type: DataTypes.STRING
},
image: {
type: DataTypes.STRING
},
quantity: {
type: DataTypes.INTEGER
},
},
);
Checkout_product.associate = function (models) {
Checkout_product.hasMany(models.Product_attribute, {
foreignKey: "product_id",
sourceKey: "id"
});
};
return Checkout_product;
};
product_attribute model
module.exports = function (sequelize, DataTypes) {
var Product_attribute = sequelize.define(
"product_attributes",
{
product_id: {
type: DataTypes.INTEGER
},
attribute_name: {
type: DataTypes.STRING
},
attribute: {
type: DataTypes.STRING
},
price: {
type: DataTypes.STRING
},
},
);
Product_attribute.associate = (models) => {
Product_attribute.belongsTo(models.Checkout_product, {
foreignKey: "product_id",
sourceKey: "id"
});
};
return Product_attribute;
};
models/index.js file
"use strict";
const fs = require("fs");
const path = require("path");
const Sequelize = require("sequelize");
const config = require("./../config/development").database;
let sequelize = new Sequelize(
config.database,
config.username,
config.password,
config
);
let db = {};
fs
.readdirSync(__dirname)
.filter(function(file) {
return file.indexOf(".") !== 0 && file !== "index.js";
})
.forEach(function(file) {
let model = require(path.join(__dirname, file));
db[model.name] = model;
});
Object.keys(db).forEach(function(modelName) {
if ("associate" in db[modelName]) {
db[modelName].associate(db);
}
});
db.sequelize = sequelize;
db.Sequelize = Sequelize;
module.exports = db;
Controller
const Checkout_product = require('../models');
module.exports.checkout_product_get = function (req, res) {
Checkout_product.findAll({
include: [ {
model : Product_attributes,
}]
})
.then(checkout_product => {
res.json(checkout_product)
})
}
I am stuck to get data from checkout_product & it's child model product_attribute model,
Everytime I am getting same error : TypeError: Checkout_product.findAll is not a function
const Checkout_product = require('../models').table_name;
Can you try it
You are using the deprecated - legacy way of Sequelize to initialize models. Newer ways with require and extends are available and suggested. Check the docs for more information.
Regarding your code....
You are neither initializing the db structure properly nor using it correctly later...
First your code here in index.js:
.forEach(function(file) {
let model = require(path.join(__dirname, file));
db[model.name] = model;
});
Just loads the model files in the db object. But these files are functions ment to be called with sequelize object as parameter. This is done by providing them to sequelize.import that manages the proper call of the defined model-functions to create the model instances. Check https://sequelize.org/master/manual/models-definition.html
Also after successfully initializing the db, in your controller code, the require('../models') returns the total db object. So if you want to use a specific model as Checkout_product in your case, you have to access it in the object:
const db = require('../models');
db.Checkout_product.findAll()...
I'm building a simple site that handles users using Passport.js. I can run my server but when a user submits their signup information it spits out "TypeError: Cannot read property 'create' of undefined".
I know what's happening, I just can't understand why. The error gets thrown in api-routes.js, specifically in the api/signup function when it attempts to create a user via db.User.create. When I console.log(db), the first thing in the db object is
undefined: 'C:\\Users\\LENOVO\\Desktop\\code\\Breel\\models\\user.js'
...so the user model is being exported, it's just not defined?
Any and all help you can lend me is greatly appreciated!
user.js, from my models directory:
var bcrypt = require("bcryptjs");
module.exports = function (sequelize, DataTypes) {
var User = sequelize.define("User", {
email: {
type: DataTypes.STRING,
allowNull: false,
unique: true,
validate: {
isEmail: true,
},
},
password: {
type: DataTypes.STRING,
allowNull: false,
},
});
User.prototype.validPassword = function (password) {
return bcrypt.compareSync(password, this.password);
};
User.hook("beforeCreate", function (user) {
user.password = bcrypt.hashSync(
user.password,
bcrypt.genSaltSync(10),
null
);
});
return User;
};
index.js, from models (this and user.js are the only two files in my models directory)
"use strict";
const fs = require("fs");
const path = require("path");
const Sequelize = require("sequelize");
const basename = path.basename(__filename);
const env = process.env.NODE_ENV || "development";
const config = require(__dirname + "/../config/config.json")[env];
const db = {};
let sequelize;
if (config.use_env_variable) {
sequelize = new Sequelize(process.env[config.use_env_variable], config);
} else {
sequelize = new Sequelize(
config.database,
config.username,
config.password,
config
);
}
fs.readdirSync(__dirname)
.filter((file) => {
return (
file.indexOf(".") !== 0 && file !== basename && file.slice(-3) === ".js"
);
})
.forEach((file) => {
const model = path.join(__dirname, file);
sequelize["import"];
db[model.name] = model;
});
Object.keys(db).forEach((modelName) => {
if (db[modelName].associate) {
db[modelName].associate(db);
}
});
db.sequelize = sequelize;
db.Sequelize = Sequelize;
module.exports = db;
api-routes.js, from my routes directory:
var db = require("../models");
var passport = require("../config/passport");
module.exports = function (app) {
app.post("/api/login", passport.authenticate("local"), function (req, res) {
res.json("/members");
});
app.post("/api/signup", function (req, res) {
console.log(req.body);
console.log(db);
db.User.create({
email: req.body.email,
password: req.body.password,
})
.then(function () {
res.redirect(307, "/api/login");
})
.catch(function (err) {
console.log(err);
res.json(err);
});
});
app.get("/logout", function (req, res) {
req.logout();
res.redirect("/");
});
app.get("/api/user_data", function (req, res) {
if (!req.user) {
res.json({});
} else {
res.json({
email: req.user.email,
id: req.user.id,
});
}
});
};
You should correct a registration process of models:
.forEach((file) => {
const modelFile = path.join(__dirname, file);
const model = sequelize['import'](modelFile)
db[model.name] = model;
})
Background
I am working with Sequelize v4.2 and Express v4.15.2 and attempting to setup the models and associate them with one another. I have struggled to find any working v4.x Sequelize examples even after viewing this Express/Sequelize tutorial as well as the v4 migration docs.
Issue
Currently I am receiving the error below when trying to setup my initial models and associations.
/Users/james/Sites/awesome-app/server/node_modules/sequelize/lib/associations/mixin.js:80
if (!target.prototype || !(target.prototype instanceof this.sequelize.Model)) {
TypeError: Cannot read property 'prototype' of undefined
at Function.<anonymous> (/Users/james/Sites/awesome-app/server/node_modules/sequelize/lib/associations/mixin.js:80:16)
Files/Code
My model setup file (index.js) looks like...
const fs = require('fs');
const path = require('path');
const Sequelize = require('sequelize');
const basename = path.basename(module.filename);
const env = process.env.NODE_ENV || 'development';
const config = require(__dirname + '/../config/config.json')[env];
let db = {};
let sequelize = undefined;
if (config.use_env_variable) {
sequelize = new Sequelize(process.env[config.use_env_variable]);
} else {
sequelize = new Sequelize(config.database, config.username, config.password, config);
}
fs
.readdirSync(__dirname)
.filter((file) => {
return (file.indexOf(".") !== 0) && (file !== 'index.js');
})
.forEach((file) => {
const model = sequelize.import(path.join(__dirname, file));
db[model.name] = model;
});
Object.keys(db).forEach(function(modelName) {
if ('associate' in db[modelName]) {
db[modelName].associate(db);
}
});
db.sequelize = sequelize;
db.Sequelize = Sequelize;
module.exports = db;
And my first model (address.js) that fails looks like...
module.exports = function(sequelize, DataTypes) {
var Address = sequelize.define('Address', {
street: DataTypes.STRING,
city: DataTypes.STRING,
state: DataTypes.STRING,
zip: DataTypes.STRING,
});
Address.associate = function(models) {
Address.belongsTo(models.attendeeGroup, {
onDelete: 'CASCADE',
foreignKey: {
allowNull: false
},
});
}
return Address;
};
I am looking to setup my database tables and associate various models with one another. Is there another piece of setup I am missing?
My model I wanted to associate with was incorrectly named/capitalized. I had Address.belongsTo(models.attendeeGroup, { where attendeeGroup was camel case, but in fact it needed to be capitalized like AttendeeGroup which is the name of my other model.
My database was successfully created once I changed this model name.
I am trying to learn how to work with KrakenJs and use mysql for my database.
but I have not been able to find anything on line , this is what i have come up with so far
I have created a folder called lib and I want to have my connection file db.js to the database
'use strict';
var mysql = require('mysql');
var Sequelize = require('sequelize');
var sequelize = new Sequelize('site', 'root', 'root', {
host: 'localhost',
dialect: 'mysql',
pool: {
max: 5,
min: 0,
idle: 10000
},
});
module.exports = sequelize;
first of all I am not sure what needs to go my main index.js file config option part ...
'use strict';
var express = require('express');
var kraken = require('kraken-js');
var db = require('./lib/db');
var options, app;
/*
* Create and configure application. Also exports application instance for use by tests.
* See https://github.com/krakenjs/kraken-js#options for additional configuration options.
*/
options = {
onconfig: function (config, next) {
/*
* Add any additional config setup or overrides here. `config` is an initialized
* `confit` (https://github.com/krakenjs/confit/) configuration object.
*/
next(null, config);
}
};
How to set up my model , this is just a simple model , I just wanna get the idea of how to use it ...
'use strict';
var db = require('../lib/db');
module.exports = function User() {
var User = sequelize.define('user', {
firstName: {
type: Sequelize.STRING,
},
lastName: {
type: Sequelize.STRING
}
}, {
freezeTableName: true // Model tableName will be the same as the model name
});
};
and Lastly how to use it my controller
'use strict';
var User = require('../models/users');
module.exports = function (router) {
// var model = new User();
router.get('/', function (req, res) {
User.findOne().then(function (user) {
res.render('index', user);
});
});
};