Peewee ORM: Explore the Ins and Outs, Perils and Pitfalls!

Peewee, an incredibly powerful Object-Relational Mapping (ORM) tool, allows developers to easily and efficiently manage databases. Although using the Peewee ORM may seem simple at first - just connect it to your code to establish a database connection - after some time, you may realize that this tool has its complexity.

When we start diving into the Peewee ORM code, we may notice that it has some non-obvious features. Firstly, database queries in Peewee are lazy, meaning they are executed only when needed. This means that through improper code usage, we may unknowingly trigger a lot more database queries than necessary.

Another aspect that requires understanding is the way different models are related. In Peewee, access to related models is also lazily invoked, which can lead to unexpected results that are difficult to understand without a full understanding of how Peewee works. For example, if we have two related tables and we want to refer to the second table through an object from the first one, we should understand that Peewee will execute an additional query to the database.

The last thing to understand when working with Peewee ORM is that not every function is well-documented. Therefore, when using some advanced features, we may encounter certain difficulties. Increasing understanding of this library and its components, as well as mastering the assumptions of the ORM, will allow us to better utilize this tool.