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Hierarchical Structures in PostgreSQL
2 projects | news.ycombinator.com | 25 Jun 2021
I'm actually using materialized views and CTE with PhotoStructure (where hierarchies are arguably the cornerstone of the product).
It's pretty funny that I landed on this implementation, given that I spent a couple years building https://github.com/ClosureTree/closure_tree (one of the most popular acts-as-hierarchy ActiveRecord gems), as it (unsurprisingly) uses closure trees.
When CTE isn't available, closure trees are nice, but boy howdy, does that closure tree table get gigantic with deeper graphs.
If CTE is available, closure trees don't even come close in performance and simplicity.
(Hint: materialized paths should use a unique separator: ASCII 0x1F is applicable: https://en.wikipedia.org/wiki/C0_and_C1_control_codes#Field_...)
Find all objects of a chain of associations on the same table
2 projects | reddit.com/r/rails | 2 Mar 2021
I’ve used this for that https://github.com/ClosureTree/closure_tree
We haven't tracked posts mentioning DbTextSearch yet.
Tracking mentions began in Dec 2020.
What are some alternatives?
Ancestry - Organise ActiveRecord model into a tree structure
Awesome Nested Set - An awesome replacement for acts_as_nested_set and better_nested_set.
ActsAsTree - ActsAsTree -- Extends ActiveRecord to add simple support for organizing items into parent–children relationships.
mini_record - ActiveRecord meets DataMapper, with MiniRecord you are be able to write schema inside your models.
ActsAsList - An ActiveRecord plugin for managing lists.
rails_or - Cleaner syntax for writing OR Query in Rails 5, 6. And also add #or support to Rails 3 and 4.
Mongoid Tree - A tree structure for Mongoid documents using the materialized path pattern
Ryakuzu - :heart_eyes_cat: Interface for schema.rb
ActiveRecord Reputation System - An Active Record Reputation System for Rails
ActiveRecord::Turntable - ActiveRecord Sharding Plugin
ActiveRecord Import - A library for bulk insertion of data into your database using ActiveRecord.