Mongoose VS handlebars.js

To manage user auth we need to create a user account - identification. So, let's install mongoose and jsonwebtoken to handle JWT authentication - an alternative to creating a user session when a user logs in

If your application uses MongoDB's Node.js driver or Mongoose ODM, occasionally you may observe errors such as querySrv ECONNREFUSED _mongodb._tcp.cluster0.abcde.mongodb.net or Error: querySrv ETIMEOUT _mongodb._tcp.cluster0.abcde.mongodb.net being thrown. The MongoDB Atlas documentation outlines several methods to troubleshoot connection issues, including how to handle "Connection Refused using SRV Connection String" scenarios, but why does this happen in the first place?

If you use Sequalize, TypeORM or for MongoDB, we have Mongoose these types of ORM tools, then you are safe by default because these help us against the SQL query injection attacks by default.

Mongoose

Now that we have created a new MongoDB deployment and saved the connection string in .env file, we would enter the code below to connect to MongoDB database through mongoose. Then, open db.js and enter this code:

Mongoose is a popular JavaScript library used with MongoDB, a NoSQL database. It provides an elegant and user-friendly way to interact with MongoDB from Node.js applications. Mongoose offers several key benefits:

To simplify this process, Cerbos developers have come up with adapters for popular Object-Relational Mapping (ORM) frameworks. You can check out for more details on the query plan repo - which also contains adapters for Prisma and SQLAlchemy - as well as a fully functioning application using Mongoose as its ORM.

After importing the mongoose module, use the [mongoose.connect()](https://mongoosejs.com/docs/api/mongoose.html#mongoose_Mongoose-connect) function to connect to the database. The first argument is the connection string, and the second argument is an object that contains the options, which are used to configure the connection. The above code logs the message, MongoDB connection is established successfully! 🎉, once the connection is successful.

Helmet helps “sanitise” the input, which might not have come from the UI directly. Mongoose is what is known as an Object Document Modelling (ODM), which defines a structure (schema) for the stored data, making it easier to manage in Express. These additions have been omitted from our example stack purely to simplify the tutorial and focus on the fundamental tiers and interfaces.

If you have a bit of Nodejs SSR background, you would already be accustomed to templating libraries like Pug, Handlebars, EJS, etc. If you’re from a PHP background you would be familiar with the Blade templating engine. These templating libraries basically help you render dynamic data from the backend on the frontend. They also help you generate markup with loops based on conditions.

It’s time to create our code template. To do this, we use handlebars js, which allows us to create templates at a basic level. We create a folder called templates in the project home directory and add our template files inside.

Templating engine: SSGs rely on templating engines to define the structure of web pages. These engines enable developers to create reusable templates and incorporate dynamic content. Popular templating engines include Liquid, Handlebars, Mustache, EJS, ERB, HAML, and Slim.

Here's our first usage of the handlebars (docs) template. The .hbs extension will be removed once we run the action. Inside index.ts.hbs, add:

Id use handlerbars JS - https://handlebarsjs.com/

Node.js programming language will be used for simplicity. Handlebars template engine to separate data from the presentation. html2pdf.app to convert HTML to PDF, but as an alternative Puppeteer can be used also (you can find a complete tutorial How to convert HTML to PDF with puppeteer).

Handlebars.js site

But a valid question is: Why not use a template like Handlebars? For the use case inside Woovi, templates won't help us because we would need two core points: reuse our design system and ensure the usage of GraphQL in our payment link.

You might want to brush up on https://handlebarsjs.com/ if you want to make templates.

Once the package is set up, it will provide a MailService class that has a method named sendEmail that will receive some parameters and then send the mail. But first, we need to create the mail template and for that, we will use handlebars. It will allow us, to create HTML templates in which we can pass dynamics parameters, such as the user name or its information, and write inline CSS to style our email.