search for: acts_as_nested_set

Where can I see the API acts_as_nested_set constructs? I''ve read its page in api.rubyonrails.com but I don''t see how to manage the tree from there. -- fxn

I moved from acts_as_tree to acts_as_nested_set because I need the all_children method. I''ve seen an alternative way to add this method to acts_as_tree here: http://www.chuckvose.com/articles/2006/05/24/recursive-children But I''d prefer to use the more efficient way of acts_as_nested_set (and not to have to revert to my old...

Hello, I am using acts_as_nested_set. My problem is that the columns "lft" and "rgt" get the value 0 if I create a new entity. If I delete an entity I get negative values (-1, -2, -3) - but for all entities. Is there anything missing? Is there any example for "acts_as_nested_set" in the web? -- Post...

I am creating forum application which needs usage of acts_as_list or acts_as_tree or acts_as_nested_set. I am unable to decide among these. please could some one recommend from their experience? -- Posted via http://www.ruby-forum.com/.

I''m trying to use acts_as_nested_set, as modifed by Bob Silva to add threaded functionality. I''m getting the following error: undefined method `display_threads'' for #<PostController:0x3ae9828> ... #{RAILS_ROOT}/app/controllers/post_controller.rb:18:in `list'' Line 18 in post_controller.rb shows: [po...

I''m currently using acts_as_tree to display threaded Comments on my forums-like site. It''s waaay too slow to display a page with 1,000 comments, as it''s issuing a TON of selects. I''m pretty sure I want to convert to the nested set model, using acts_as_nested_set or acts_as_threaded. This should give me the performance I''m looking for. The problem, of course, is the adjacency model that is used by acts_as_tree only has parent_id, it doesn''t have the left/right data needed by the nested set model. Has anyone seen or written an algorith...

...menus. There''s several menus (with their own model since each menu got some special information). Now, I want to be able to specify the order of the menu entries inside the menu. acts_as_list seems to not quite do the trick since it does ordering "globally" on the whole model and acts_as_nested_set seems like overkill since I''m never going to need more then one menu''s entries at a time. Should I got for acts_as_nested_set or should I simply create my own ordering system with a column and some checks that makes sure no numbers are repeated inside each menu''s entries...

...ying to get act_as_nested_set working, and I''m puzzled. I googled the following http://codefetch.com/cache?url=http://media.pragprog.com/titles/rails/code/r ails-code.tgz <http://codefetch.com/cache?url=http://media.pragprog.com/titles/rails/code/ rails-code.tgz&path=rails-code/ar/acts_as_nested_set.rb&lang=ruby&qy=ruby> &path=rails-code/ar/acts_as_nested_set.rb&lang=ruby&qy=ruby Which I''m inserting here: class Category < ActiveRecord::Base acts_as_nested_set end Category.delete_all def add_child(parent, name) child = Category.create(:name => n...

I have a model using acts_as_tree which is working fine. Being new to Ruby I''m don''t know what enumerator is best to use for traversing a tree by depth. I can write one, but before I do I wanted to know if there is there an enumerator for traversing trees available that the community recommends? Thank you, Jose -- Posted via http://www.ruby-forum.com/.

Has anyone extended Rails''s acts_as_tree to use the Modified Preorder Traversal algorithm? This is a really clever trick for optimizing access to trees stored in databases, as described lucidly in this article: http://www.sitepoint.com/article/hierarchical-data-database/2 It adds two integer fields, a "left counter" and "right counter", to each row. By

Hello, I have a tree structure that needs to be converted into a nested set. A great deal of work has already been done on the tree items, so maintaining the integrity of the id''s is mandatory. However I need the ability to access entire branches of the tree, which is what Nested set does. Does anyone have any suggestions on how to efficiently transfer the tree to the nested set and

I''m trying to enhance acts_as_nested_set. Well actually I already have, but I''ve done a hack up job of it. I would like to contribute these enhancements back, but I need a little help. I''m a complete newbie to this stuff. The only thing I new before coming into this project was vanilla HTML. So over the course of tw...

Hi I was wondering if acts_as_nested_set can be used safely with concurrently updates? The fact that so much of the tree needs to be rewritten on inserts concerns me. Is anyone actually using it. I noticed that the status of acts_as_nested_set was unclear at the time the rails book was written. Regards, Glen

...on"=>"something new", "description"=>"<p>fsdfgdsg</ p>"} Elibrary is declared as inherited from MediaItem, and attr are declared accessible in MediaItem.... class MediaItem < ActiveRecord::Base belongs_to :media_container # Behaviours acts_as_nested_set attr_accessible :title, :short_description, :description ... class Elibrary < MediaItem end when @elibrary = Elibrary.new, then assigning attributes to @elibrary, save is OK..... 1- even duplicatiing the attr_accessible in both classes doesn''t help 2- acts_as_nested_set brought ad...

Hello list, I think I have a rails related RSpec problem with a mock going out of scope on a recursive call to a model. The code is at: http://pastie.textmate.org/79821 if you want to see it highlighted. I have pasted it below as well. Basically, I have an acts_as_nested_set model called "Node", which works fine. I have a function which finds the language name of the node instance. If the language is nil for the node instance being queried, it then recursively calles language_name on it''s parent until one of them has the language. Then this gets r...

hi, I''ve a normal Category model implemented with acts_as_tree (name, parent_id) that has_many :products (name, category_id). What I''m asking for is a method to fetch every product that belongs fall into a particular category and its children, eg: if I''m asking for a root node (/category/show/1) I need to display every product that have category_id = 1 AND every product

Dear List, Given that I am developing a rails 2.3.5 site, When it comes to storing threaded comments in a blog or forum, Then which plugin/gem should be considered "State of the Art"? I''m starting with these URLs: http://github.com/rails/acts_as_tree http://github.com/rails/acts_as_nested_set http://github.com/collectiveidea/awesome_nested_set http://github.com/chris/better_nested_set http://github.com/elight/acts_as_commentable_with_threading I''m looking for opinionated people with opinions about my question. -- You received this message because you are subscribed to the Go...

...dshimy/http_authentication) Darian Shimy Lars Smit auto_complete (https://github.com/david-kerins/auto_complete) dkerins Devdatta atom_feed_helper (https://github.com/TrevorBramble/atom_feed_helper) Trevor Bramble acts_as_tree (https://github.com/amerine/acts_as_tree) Mark Turner Swanand Pagnis acts_as_nested_set (https://github.com/bbommarito/acts_as_nested_set) BrianBommarito account_location (https://github.com/bbommarito/account_location) BrianBommarito render_component (https://github.com/malev/render_component) Marcos Vanetta localization (https://github.com/malev/localization) Marcos Vanetta dead...

I''m trying to wrap my caffeine soaked brain around has_many :through following along at: http://rails.techno-weenie.net/tip/2005/12/23/teaching_your_blog_model_new_tricks_with_has_many_through I think my models are a little more complex than what fits this narrative. I have a directory of members, each member can belong to multiple categories. The category table references itself

Hello, I''m using the Awesome Nested Set plugin: https://github.com/collectiveidea/awesome_nested_set And in my model I do the following: acts_as_nested_set after_save :ensure_max_nestedset_level private def ensure_max_nestedset_level if self.level > 2 self.move_to_child_of(parent.parent) end end I do this to keep the levels from getting to deep. Any idea why I''m getting this "Impossible move, t...