Blog posts by:

Szymon Soppa

Rails & Elixir Developer
21.06.2018 | Szymon Soppa

Three ways of iterating over tree-like ActiveRecord structures

You are building an e-commerce app and at some point you introduce a Category model as a part of Product data. A Category can have various subcategories, which are represented by the same model. At this point, it's obvious we are dealing with a tree-like data structure. Step by step, I'll introduce three ways of iteration over such a structure and compare their performance.

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