similar to: acts_as_tree related question

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

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

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

Using acts_as_tree, is it possible to get information of the depth a tree leaf in relation to the root? Or is available to derive information to save in the way "position" can be derived and saved for acts_as_list. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To

i have a model called certification_types that i''ve declared as acts_as_tree. I have a model called certification that belongs_to :certification_type . class CertificationController < ApplicationController ..... def summary_list @certifications = Certification.find(:all, :order=>''date'') end end summary_list.rhtml <% for certification in

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/.

Hi, I''m working with acts_as_tree to print an unordered list of items: Root -- Child ---- Child I''ve got this working, however I''d like to know if there is a more elegant fashion that I''m unaware of: #Takes a parent category and recursivley returns all children def find_all_subcategories(category) if category.children.size > 0

I am working on an Rails application that uses a pretty complex category structure through out the site. I have defined a table to house all the info and a FK to reference parents within the table CREATE TABLE categories ( id int(11) NOT NULL auto_increment, name varchar(50) NOT NULL, parent_id int(11) default NULL, constraint fk_category_id foreign key (category_id) references

Hello all, It''s been a while since i''ve been doing any rails development, so i''m a bit rusty. Having found this: http://opensource.symetrie.com/api/better_nested_set/ it looks really interesting and useful for solving something i''m trying to get working. What i have (essentially) is the following models: class Group < ActiveRecord::Base

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,

I''m using acts_as_tree to maintain a hierarchy of categories (each top-level category can contain multiple categories and each sub-category can contain multiple sub-categories, etc.). I want to be able to find all parents of a particular category. I realize that I can use @category.parent or even @category.parent.parent to move up in the hierarchy, but I need this to happen dynamically

Hi, After doing a clean install of ovirt in a Fedora 11 VM, I am unable to get anything working in the web interface. All I get is an error 500. After reviewing the logs I see the following error in /var/log/http/error.log [Thu Nov 26 11:29:11 2009] [notice] Apache/2.2.13 (Unix) DAV/2 mod_auth_kerb/5.4 mod_nss/2.2.11 NSS/3.12.2.0 mod_python/3.3.1 Python/2.6 configured -- resuming normal

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/.

Having a devil of a time finding records in a self-referencing has_many table relationship. Everything is working find looking at the has_many and the belongs_to relationship. But, when I try to find all "orphans", records that are neither a parent nor a child, I can not find a query that work in ActiveRecord. This query works in MySQL: SELECT * FROM templates LEFT JOIN templates

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 code). Anyway, here''s my issue: if I

I''m interested in working on a message board application that uses ruby on rails. I''d like to see something end up similar to vBullieten, but with more of a 37signals type of less-is-more philosophy... mostly meaning less need for preferences and settings and configurations. I''ve checked rubyforge, and it looks like there are various forum apps uploaded there, some

Hey guys, This is the final list of the new maintainers of each plugin. We need two more things to do: First please the owners of the repos add the rest of the maintainers. Second I will add a note on each rails/plugin mentioning this repos updates. So from now on, if someone else is interested in helping/contributing please send a message to the appropriate repo owner. verification

Hello, I am in the process of trying to date hierarchical data in a MySQL database and convert it into a treeview view JS scripting. As a beginner to ROR there are still many unknown things to me, and handling this sort of data is one of them. My question is this: Is there any built in functionality for handling hierarchical data (via a MySQL DB) in Rails/Ruby? If there is can someone please

We are pleased to announce the 0.1 release of the plugin betternestedset. It greatly enhances ActiveRecord''s internal acts_as_nested_set. Install it with: script/plugin install svn://rubyforge.org/var/svn/betternestedset/tags/stable/betternestedset Join the mailing list: http://rubyforge.org/mailman/listinfo/betternestedset-talk Report bugs:

Hi, I have a model that uses acts_as_tree option to manage a tree structure in the database. Is it possible to fetch the entire tree with constant number of database calls and cache the tree in memory? Thanks! Bob -- Posted via http://www.ruby-forum.com/.