sequelize | rich ORM for modern Node | SQL Database library
kandi X-RAY | sequelize Summary
kandi X-RAY | sequelize Summary
Sequelize is an easy-to-use and promise-based Node.js ORM tool for Postgres, MySQL, MariaDB, SQLite, DB2, Microsoft SQL Server, and IBM i. It features solid transaction support, relations, eager and lazy loading, read replication and more. Sequelize follows Semantic Versioning and the official Node.js LTS schedule. Version 7 of Sequelize officially supports the Node.js versions ^12.22.0, ^14.17,0, ^16.0.0. Other versions might be working as well. New to Sequelize? Take a look at the Tutorials and Guides. You might also be interested in the API Reference. Would you like to contribute? Read our contribution guidelines to know more. There are many ways to help! .
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Top functions reviewed by kandi - BETA
- Escape a value in a given type .
- Main compilation function
- Parses the given value into an array .
- Convert to a where key and value .
- Combines two AND statements
- Parses a float .
- Parse a bound number and returns the bounding range .
- Converts an array to a SQL string .
- Applies all hooks
- calculate the scale and return the scale
sequelize Key Features
sequelize Examples and Code Snippets
Lines of Code : 288
License : No License
Copy// Requiring necessary npm middleware packages
var express = require("express");
var bodyParser = require("body-parser");
var session = require("express-session");
// Setting up port
var PORT = process.env.PORT || 8080;
// Creating express app and c import {
Entity,
PrimaryGeneratedColumn,
Index,
Column,
CreatedDateColumn,
UpdatedDateColumn,
DataType,
BelongsTo
} from 'sequelizejs-decorators';
import {Team} from './Team';
import {IncludeAssociation, Model, In var Sequelize = require('sequelize');
var sequelize = new Sequelize('sqlite://');
var gendoc = require('apidoc-sequelize-generator');
var parent = sequelize.define('parent', {
name: {
type: Sequelize.STRING,
allowNull: false
}
});
var c async function requestData (listOfCar) {
const carLists = [];
for (let i = 0; i < listOfCar.length; i++) {
const tmpListOfPromise = [];
for (let j = 0; j < 5 && i < listOfCar; j++) {
coasync function bootstrap(uuid = null) {
console.log('Calling bootstrap');
const expressServer = express();
const nestApp = await NestFactory.create(
AppModule,
new ExpressAdapter(expressServer),
);
nestApp.use(eventContexconst { Sequelize, Model, STRING,} = require('sequelize');
class User extends Model{
constructor(){
super();
}
static init(sequelize) {
return super.init({
id: {type:Sequelize.UUID, defaultValue: Sequelize.UUIDV4, primarstatic async run() {
const sequelize = new Sequelize({
dialect: 'mysql',
host: 'localhost',
port: 3306,
database: 'dio_unity2',
username: 'root',
password: '',
})
try {
aconst Sequelize = require("sequelize");
let sequelize = null;
function initializeConnection() {
sequelize = new Sequelize(
process.env.DB_NAME,
process.env.DB_USERNAME,
process.env.DB_PASSWORD,
{
dialect: "MySQL",const { Sequelize, DataTypes } = require('sequelize');
const db = require('../db/sequelize'),
sequelize = db.sequelize,
jwt = require('jsonwebtoken')
const Token = require('./token')(sequelize, Sequelize)
let {
Sequelize,
DataTypes,
} = require('sequelize')
async function run () {
let sequelize = new Sequelize(process.env.DB_NAME, process.env.DB_USER, process.env.DB_PASSWORD, {
host: 'localhost',
Community Discussions
Trending Discussions on sequelize
QUESTION
Greetings I have a problem with Heroku because it's don't want to install legacy packages for my Shopify app, my Shopify app is on Github and I just set up everything that my application needs, but when I deploy the main branch on Heroku I get this error in Heroku console below, can someone help me fix this?
...ANSWER
Answered 2022-Feb-10 at 13:23Your lock file contains conflicting dependencies. Since you were able to reproduce the error locally using npm ci we have a good way to test a fix locally.
It looks like you are depending directly on React 16. Is that something that you need directly, or is it just a dependency for Next.js?
If it's not something you need directly, upgrade it per the Next.js docs:
QUESTION
I have a composite primary key in my table Foo, and a single primary key in Bar. When I make a junction using the belongsToMany syntax, only one primary key component shows up in the junction table (the first one that is beeing defined). I was expecting to see FooId, FooDate , BarId and state.
I'm using MariaDb 10.4.21 and sequelize v6.12.1 if that matters.
...ANSWER
Answered 2022-Mar-14 at 16:11Sequelize does not support composite primary and foreign keys so you need to make id in Foo as the only unique key (ideally should be generated by DB) and so you will have a one foreign key column in FooBar per each table.
QUESTION
Am getting an error when I am deploying serverless lambda function on AWS
...ANSWER
Answered 2022-Feb-23 at 22:18You are developing a NodeJS + Webpack + Sequelize + pg + pg-hstore application. You compile everything and when you execute your webpack bundle, you have the following error
QUESTION
I have a model where I have a column name data_numbers and its type is DataTypes.RANGE(sequelize.INTEGER) I am using the following line of code to create a new row in table models.TABLE.create({ data_numbers: ?? //here is what I should write to save a range of numbers. })
...ANSWER
Answered 2022-Jan-25 at 07:17Here you go. While saving data in column type range you have to assign an array of Range type, like following
QUESTION
ANSWER
Answered 2022-Jan-23 at 14:57After hours of exploring the internet i couldn't get the answer of my problem, but debugging the code i found the problem. Actually it was one extra trailing slash in URL which made it to misbehave. I was like this before.
The correct version will be.
EXTRA NOTE: All those who have not found the solution from here should move forward to this link and look for trailing slash if found in your current URL, for making successful proxy you need to eliminate that trailing slash at the end of URL.
QUESTION
I have to convert a postgres query to Sequelize query.
Below query is working to get weekly summary. But the start day is coming as Monday.
SELECT date_trunc('week', date::date) AS "weekly", COUNT(DISTINCT(date)) AS "working_days" FROM "public"."employees" AS "Employee" WHERE ("Employee"."deleted_at" IS NULL) GROUP BY "weekly" LIMIT 100;
Code:
...ANSWER
Answered 2022-Jan-13 at 12:36You need to place both date_trunc and Interval pieces into a single Literal:
QUESTION
I am having three association tables back to back. That means item_level_1 have many item_level_2 and item_level_2 have many item_level_3. I used a search query to find any parent or child having a name containing the search text. That means if I type abc, then I need to return all parent or child with full details(parents and children). But in my case, if item_level_3 has abc in the name, it returns the parent details, but it just only returns the specific child with abc from item_level_3. I need to return all children inside item_level_3 where the same parent.
I am using MySQL database in AWS with node
I checked https://sequelize.org/master/manual/eager-loading.html#complex-where-clauses-at-the-top-level and tried different combinations. But not help. I might miss something. But I cannot find it.
...ANSWER
Answered 2022-Jan-03 at 19:16Unfortunately i think a subquery is unavoidable. You need to find lvl_2 ids first from the matching lvl_3 items.
QUESTION
I have an app with postgres as db, sequelize, and express, and whenever it receives a db query, it just stays there forever, no logging or anything I run postgres in a container which I can connect to through GUI normally When I swapped it for sqlite, it worked perfectly the application
here is the relevant piece of code
...ANSWER
Answered 2021-Dec-12 at 05:49I think it is your "0.0.0.0:5432".
If local, it should be just "localhost:5432". If deployed server is remote, it should be a certain IP address XXX.XXX.XXX.XXX:5432. If deployed server is home network, it should be "192.168.0.XXX:5432".
Check your postgres network configuration https://youtu.be/Erqp4C3Y3Ds
QUESTION
I was trying through some advanced techniques used to refactor sequilize.js models and came across how instanceMethods method can be used and util functions can be attached to it.
Example:
...ANSWER
Answered 2021-Nov-25 at 17:42Very interesting question! Let's start with what is clear so far:
- the model should return the Model instance always
- to create the Model instance, in both cases
instanceMethodsis being set as an object which contains methods.
get_instance_methods(sequelize) returns an object of functions in both situations. In the first example, this object is not extended with new functions. The function which were returned, are passed to the Model creation, hence, what get_instance_methods(...) returns, that arrives in the model's instanceMethods.
If needed, we can modify the instance_methods object before we send it to the model:
QUESTION
I wrote a custom data type by extending Abstract, like in the example listed for the following link: https://sequelize.org/v5/manual/data-types.html. Everything appears to work until I try to save foreign keys, in this case it continues to generate a new UUID instead of getting the foreign key passed in the object to the create method.
How should I accommodate foreign keys in this case? Which method call should I overload to handle a getter situation where I need to pass in values?
The code below outlines the extended class I am using
...ANSWER
Answered 2021-Nov-17 at 02:25For one-to-one (primary/foreign key relationship), check out belongsTo / HasOne associations
belongsTo
https://sequelize.org/v5/class/lib/model.js~Model.html#static-method-belongsTo
which has the following example:
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