Ancestry
Closure Tree
| Ancestry | Closure Tree | |
|---|---|---|
| 6 | 2 | |
| 3,745 | 1,848 | |
| - | 0.5% | |
| 7.2 | 4.5 | |
| about 2 months ago | about 1 month ago | |
| Ruby | Ruby | |
| MIT License | MIT License |
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Ancestry
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SQL help me please with multi nested childs
Making some guesses about what you’re trying to do, you’ll have to alter the table schema to do this efficiently. The ‘ancestry’ gem (https://github.com/stefankroes/ancestry ) can do the migration and update your parent_id-based data to enable all its cool features.
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Active record: how to recursively load children of children of children in one query?
Another gem that stores trees and can get a whole sub tree with one query is ancestry: https://github.com/stefankroes/ancestry
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Hierarchical data
Ancestry gem is what I always use for hiarichle data structures: https://github.com/stefankroes/ancestry If I understand what your looking for, it does pretty much exactly what you want.
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How to query Ancestry fast
Ancestry is a great library to organize models in a tree structure.
- Find all objects of a chain of associations on the same table
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26 most popular Ruby/Rails repositories on GitHub in July-August 2020
Ancestry is a gem that allows the records of a Ruby on Rails ActiveRecord model to be organized as a tree structure (or hierarchy). It employs the materialized path pattern and exposes all the standard tree structure relations (ancestors, parent, root, children, siblings, descendants), allowing all of them to be fetched in a single SQL query. 3,136 stars by now
Closure Tree
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Hierarchical Structures in PostgreSQL
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_...)
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Find all objects of a chain of associations on the same table
I’ve used this for that https://github.com/ClosureTree/closure_tree
What are some alternatives?
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.
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
counter_culture - Turbo-charged counter caches for your Rails app.
DbTextSearch - A unified interface on top of ActiveRecord for case-insensitive string-in-set and prefix querying, and full-text search on SQLite, MySQL, and PostgreSQL.
FriendlyId - FriendlyId is the “Swiss Army bulldozer” of slugging and permalink plugins for ActiveRecord. It allows you to create pretty URL’s and work with human-friendly strings as if they were numeric ids for ActiveRecord models.
ActiveRecordExtended - Adds additional postgres functionality to an ActiveRecord / Rails application