openfaas-templates VS Mongoose

A custom NodeJS OpenFaaS template that uses MongoDB and Mongoose to manage the data models

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.

You can check libraries in many ways. A good starting point is probably the package manager you are using in your application. In the case of Node.js, it is probably NPM. For example, if you want to check the mongoose library and look at some data points, you can head over to https://www.npmjs.com/package/mongoose.

If you did want to use MongoDB, again, people have made long tutorials for how to use mongo with node. The mongoose library is commonly used - https://github.com/Automattic/mongoose

So we started researching the state-of-the-art and discovered several libraries that could fit our requirements. The best candidates we were able to find were Mongoose, Typegoose, and TypeORM. Mongoose is a well-known Node.js library for MongoDB that implements the Data Mapper pattern and lets developers define schemas to constraint the data models associated with their domain objects. However, Mongoose works with concrete data models, which in a complex domain model scenario results in query logic duplication. Typegoose is a type-safe Mongoose wrapper that allows schema constraint declaration at domain object field level via JS decorators. Unfortunately, those very decorators leak persistence logic into the domain model. Besides, Typegoose also implements the Data Mapper pattern, thus sharing the same drawbacks of Mongoose. TypeORM, on another hand, implements the Repository pattern and provides some basic support for MongoDB. However, TypeORM presents several limitations compared to Mongoose.

One of the biggest Node.js headaches is schema drift when working with MongoDB. The solution is using Mongoose. Notice how the headline example shows it allowing you to define a Domain Object?

What's best practice to use mongoose with SvelteKit v1.0?

After that, I learned database concepts in MongoDB and then I learned about Mongoose Package which helps to connect MongoDB to Node.js and Express.js server applications.