Sequelize Not Equal - JavaScript

Sequelize is an Object Relational Mapping (ORM) library for Node.js which provides an easy-to-use interface for interacting with a database using JavaScript. One of the most commonly used operators in Sequelize is not equal which allows us to filter data in a database for all rows where a specific column does not match a certain value.

Not Equal Operator

In Sequelize, the not equal operator is denoted by ne. We can use this operator to filter data in a database based on a column value.

const { Op } = require('sequelize');

Model.findAll({
  where: {
    column_name: {
      [Op.ne]: 'value'
    }
  }
})

In the above example, column_name is the name of the column we want to filter, and value is the value we want to exclude. The [Op.ne] syntax is used to denote the not equal operator.

Using Not Equal Operator

Let's consider an example where we have a table named users in our database which stores information about all the registered users. In order to get all the users whose age is not equal to 25, we can use the not equal operator as follows:

const { Op } = require('sequelize');
const User = require('../models/user');

User.findAll({
  where: {
    age: {
      [Op.ne]: 25
    }
  }
})

In the above example, User is the model we defined to interact with the users table. We are using the findAll method to get all the users whose age is not equal to 25.

Conclusion

In this article, we discussed how to use the not equal operator in Sequelize to filter data in a database. We saw how to define the not equal operator using the [Op.ne] syntax and how to use it to filter rows based on a column value.