What is the advantage of using Sequelize?

In general, the benefits of Sequelize and Object Relational Mappers are: Sequelize allow us to write less code. Enable us to write more consistent code. You can mostly avoid SQL queries.

Why you shouldnt use ORM?

First off – using an ORM will not make your code any easier to test, nor will it necessarily provide any advantages in a Continuous Integration scenerio. In my experience, whilst using an ORM can increase the speed of development, the biggest issues you need to address are: Testing your code. Maintaining your code.

How does Sequelize ORM work?

Sequelize is a promise-based ORM for Node. js. It works with PostgreSQL, MySQL, SQLite and MSSQL dialects and features solid transaction support, relations, read replication and more. Object Relational Mapping (ORM) is a technique of accessing a relational database from an object-oriented language.

Is Sequelize promise-based?

Sequelize is a promise-based Node. js ORM for Postgres, MySQL, MariaDB, SQLite and Microsoft SQL Server. It features solid transaction support, relations, eager and lazy loading, read replication and more.

What is a promise-based ORM?

A promise in Nodejs is an event which will produce a result in the future. This result can either be a success(fulfilled) or failure(rejected). Sequelize being a promise-based ORM means that it supports NodeJS promises using the bluebirdJS library internally(which is a NodeJS promise library).

Why we should use ORM?

The most important reason to use an ORM is so that you can have a rich, object oriented business model and still be able to store it and write effective queries quickly against a relational database.

What is promise-based ORM?

What does Sequelize sync do?

sync(options) , an asynchronous function (that returns a Promise). With this call, Sequelize will automatically perform an SQL query to the database. Note that this changes only the table in the database, not the model in the JavaScript side.