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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 rails_or 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.
Apartment - Database multi-tenancy for Rack (and Rails) applications
ActsAsList - An ActiveRecord plugin for managing lists.
Enumerize - Enumerated attributes with I18n and ActiveRecord/Mongoid support
dry-validation - Validation library with type-safe schemas and rules
ActsAsTree - ActsAsTree -- Extends ActiveRecord to add simple support for organizing items into parent–children relationships.
ranked-model - An acts_as_sortable/acts_as_list replacement built for Rails 4, 5 and 6
ActiveRecord Import - A library for bulk insertion of data into your database using ActiveRecord.
Acts As Tennant - Easy multi-tenancy for Rails in a shared database setup.
Ruby JSON Schema Validator - Ruby JSON Schema Validator