collectiveidea/awesome_nested_set

Health v2 · maintenance only

Adoption not part of the score

2411 stars · 489 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Ruby gem implementing the nested set pattern for ActiveRecord models, serving as a modern replacement for acts_as_nested_set and BetterNestedSet. It manages hierarchical tree data in relational databases using lft/rgt/parent_id columns with configurable options and STI support.

Use cases

• store hierarchical categories in rails
• manage tree structures in activerecord
• replace acts_as_nested_set
• query nested set hierarchies in ruby
• model parent-child relationships in a database
• implement nested comments or menus in rails

When to choose

• you use ActiveRecord/Rails and need hierarchical tree data with efficient subtree queries
• you want a maintained, bug-fixed replacement for acts_as_nested_set or BetterNestedSet
• you need STI support or configurable column names for nested sets

When to avoid

• you use a non-Ruby or non-ActiveRecord stack
• you only need shallow parent-child relations where a simple parent_id with adjacency lists suffices
• your data changes very frequently, since nested sets are costly to update

Facets

library · maturity stable

orm database databases web-development developer-tools ruby jvm nested-set activerecord rails hierarchical-data tree-structure gem

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