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Authentication and Authorization are essential parts of most applications. There are many different approaches and strategies to handle authentication. This article presents the same production that can be adapted.
We will use Nest.js to build the following:
In the first part, create a Multi-tenancy Application In Nest.js - Part 1, we set up the Nest.js framework and configured and tested the microservices architecture application using Nest.js. In its second part, we used Sequelize and Mongoose to access the database and tested for both MySQL database and MongoDB.
In this part; we will see how to let the application connect to multiple databases depending on the request. Since it is a multi-tenancy application, each tenant has their own database containing their data accessing the same application, thus the application needs to connect to different databases. We will change the pass repository option method and use forRootAsync() instead of forRoot(), we need to use a custom class for configuration.
In Create a Multi-tenancy Application In Nest.js - Part 1, we set up the Nest.js framework, configured, and tested the microservice application using Nest.js.
Nest gives us all the tools to work with any SQL and NoSQL database. You have a lot of options, you can also use almost all ORM and libraries in Nest.js and typescript, like Sequelize, TypeORM, Prisma, and of course mongoose.