AdonisJS and Where

AdonisJS is a Node.js web framework that is designed to be easy and enjoyable to use. One of the features that makes AdonisJS stand out is the ability to generate SQL queries with ease using the Query Builder. The Query Builder provides a simple but powerful API for constructing SQL queries, and the where method is one of the most important methods in the Query Builder.

The where Method

The where method is used to add conditions to a SQL query. It is used to filter the results of a query based on the values of certain fields. The where method takes two arguments: the name of the field to compare and the value to compare against.

Here's an example of using the where method to filter users by name:

const users = await Database.table('users').where('name', 'John');

In this example, the where method is used to filter the users table based on the value of the name field. The query will return all the users whose name is equal to 'John'.

The orWhere Method

The orWhere method is used to add an OR condition to a SQL query. It is used to filter the results of a SQL query based on multiple values. The orWhere method takes the same two arguments as the where method, and it can be chained with other where or orWhere methods to create complex queries.

Here's an example of using the orWhere method to filter users by name or email:

const users = await Database.table('users').where('name', 'John').orWhere('email', 'john@example.com');

In this example, the where method is used to filter the users table based on the value of the name field. The orWhere method is then used to add an OR condition to the query, so that it will also return users whose email is equal to 'john@example.com'.

Conclusion

The where and orWhere methods are powerful tools for filtering the results of SQL queries in AdonisJS. They provide a simple and readable API for creating complex queries, and they make it easy to work with data in your Node.js applications.