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My project: railstart app
47 projects | /r/rails | 12 Jun 2022
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 | /r/rails | 2 Mar 2021
I’ve used this for that https://github.com/ClosureTree/closure_tree
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.
BabySqueel - :pig: An expressive query DSL for Active Record
Goldiloader - Just the right amount of Rails eager loading
Ruby JSON Schema Validator - Ruby JSON Schema Validator
rails_or - Cleaner syntax for writing OR Query in Rails 5, 6. And also add #or support to Rails 3 and 4.
activerecord_json_validator - 🔩 ActiveRecord::JSONValidator makes it easy to validate JSON attributes against a JSON schema.
Discard - 🃏🗑 Soft deletes for ActiveRecord done right
Mongoid Tree - A tree structure for Mongoid documents using the materialized path pattern
StoreModel - Work with JSON-backed attributes as ActiveRecord-ish models
ValidatesZipcode - Postal code / zipcode validation for Rails, supporting 233 country codes