How to use the Error function from sequelize

sequelize.Error is an error class used by Sequelize, a Node.js ORM, to represent various database errors.

How does sequelize.Error work?

sequelize.Error is a custom error class provided by Sequelize, a Node.js ORM for relational databases, which is used to represent errors thrown by Sequelize when interacting with a database. It extends the built-in JavaScript Error class and adds additional properties and methods specific to Sequelize errors, such as a reference to the original database error and the SQL query that caused the error.

Ai Example

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const { Sequelize } = require("sequelize");

const sequelize = new Sequelize({
  dialect: "mysql",
  host: "localhost",
  username: "root",
  password: "password",
  database: "mydb",
});

try {
  await sequelize.authenticate();
  console.log("Connection has been established successfully.");
} catch (error) {
  if (error instanceof Sequelize.ValidationError) {
    console.error("Validation error occurred:", error);
  } else if (error instanceof Sequelize.DatabaseError) {
    console.error("Database error occurred:", error);
  } else {
    console.error("Unknown error occurred:", error);
  }
}

In this example, the sequelize.authenticate() method is used to test the connection to the MySQL database. If an error occurs, it is caught in the catch block and the type of error is checked. If it is a validation error, it is logged as a validation error. If it is a database error, it is logged as a database error. If it is neither of these types, it is logged as an unknown error.