In this article we explore how to connect an Express application with a Postgres database using the Sequelize ORM step by step
To get started install the necessary dependencies with npm install express pg pg-hstore sequelize
Then create a sequelize js configuration file where you define the connection to Postgres indicating host port user and password
In your Express server import Sequelize and initialize the connection with new Sequelize passing your database parameters
Define your models by creating classes that extend Sequelize's Model and indicate the fields types and relationships between tables
Use sequelize authenticate to verify that the connection has been established correctly and sequelize sync to create the tables if they do not exist
From that point on you can use methods like findAll create update and destroy to manage Postgres records from your API
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