similar to: has_many :conditions

Hi, I''m trying 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>

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? -- Posted via http://www.ruby-forum.com/.

Hi, has anyone successfully used the acts_as_threaded plugin with postgresql? I''m using rails 1.0 and ruby 1.8.4 on linux. Following the screencast on http://www.railtie.net/articles/2006/02/05/rails-acts_as_threaded-plugin , I got to where we''re ready to create our first post, having made the changes to controllers/posts_controller.rb, views/posts/_form.rhtml,

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

Dear R-help I am wondering if somebody wrote some code to convert an adjacency list model into a nested set model. In principal I want to do the same as John Celko mentioned it here with SQL: http://groups.google.co.uk/groups?hl=en&lr=lang_en&selm=8j0n05%24n31%241 %40nnrp1.deja.com Assume you have a tree structure like this Albert / \ /

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 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 two weeks I''ve picked up Ruby, Rails, MySQL,

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

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,

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

This plugin is related to the acts_as_nested_set functionality but differs in that it allows multiple roots to exist within your database. The other benefit, is that when adding a child, it doesn''t perform a full table update to rebuild the tree, each child insertion only affects the tree that it is placed in. It even comes with my first screencast to show how you can build an old

Dear All, I have imported an HTML document to R (called tables) and wish to select certain pieces of it for processing. The first few lines of the object appear as follows: > tables [[1]] <table id="fs-table" class="gf-table rgt"> <thead> <tr><th class="lm lft nwp"> In Millions of USD (except for per share items) </th> <th

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.

I started using robotcoop''s CachedModel class in my project but have encountered problems when using it with the acts_as_ferret plugin. It seems it doesn''t index everything in my STI model, also if I do a search from my base STI class I get a result count but no results. If I run the same search from one of the children STI models I get the appropriate results (if the information

Is there a way to provide "sticky" options to ActiveRecord::Base::Find ? I''m thinking something with a use model like: class Function < ActiveRecord::Base sticky :conditions => "lft > 0", :order => "lft ASC" end Where all subsuquent find operations have those options applied. In this case: Function.find(:all) Would actually be equivalent

Hi everybody, I'm mirroring some websites with rsync (daemon on the source), and I noticed in the destination host some error messages 'send_files failed to open filenames', Actually, the concerned files are deleted on the source host, but I would like to ask : * why does rsync say these (in which phase) ? * is these messages harmful or not ? Here below my rsync command and some

Say I have tasks with a belongs_to association to categories where the later act as a nested set. Now I want to find all tasks belonging to a specific category (given as primary key) or any of its sub-categories. SELECT tasks.*, tasks_category.name FROM categories AS nested_set_categories, tasks LEFT OUTER JOIN categories AS tasks_category ON tasks_category.id = tasks.category_id WHERE

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: [post_controller.rb] def list display_threads @posts

Happy new year! Hieraki 2.0.0 is released. You can download Hieraki2 from rubyforge.org as tgz or zip (http://rubyforge.org/projects/hieraki). Hieraki2 has a new wiki engine that ships with more than a dozen new features: * everything-is-a-wiki-page (TM) * all pages are under version control * access control list * stay in full control of the tree structure by cut and pasting

Hello guys, I''m a newbie in RoR and I have a problem. My DB structure is ====================================== topics table : id(int,11) name(varchar,255) categories : id (int,11) topic_id(varchar,255) name(varchar,255) ====================================== --Models:-- class Topic < ActiveRecord::Base has_many :categories end class