Displaying 20 results from an estimated 1000 matches similar to: "acts_as_list / acts_as_tree / acts_as_nested_set - which one"
2009 Feb 17
8
Converting Acts_As_Tree to Acts_As_Nested_Set
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
2005 Oct 12
2
Help with act_as_nested_set
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>
2006 Jun 20
2
Converting from acts_as_tree to acts_as_nested_set
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,
2006 May 10
1
acts_as_nested_set does not work (in my case).
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/.
2006 Jul 18
1
Bad values for acts_as_nested_set?
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
2006 Mar 15
5
acts_as_threaded - help ???
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,
2012 Jun 08
7
filter children with acts_as_tree
Hello Experts,
I have a tree of categories in this category object there is a property
called type.
the root categories have no type but the children have. so how I can get
all the roots with filled in children that have category type = ''B'' for
instance.
I tried to run Category.roots then delete children With a category not
equal to ''B'' but this causes a major
2006 May 12
2
Has many through join table issues
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
2007 Jan 25
1
acts_as_tree with acts_as_list
Hello all,
I''m having trouble using acts_as_list with acts_as_tree
to order the "children". I''ve found a few old posts on the web
that seem to indicate that this once worked.
class Whatever < ActiveRecord::Base
acts_as_tree :order => :position
acts_as_list :scope => :parent_id
Although the ''position'' field is being populated,
it appears
2006 Jan 15
2
acts_as_tree & acts_as_list for a single model?
Hi,
If I have a db table
categories
- id
- name
- parent_id
- position
is it alright to have the Category model act_as_tree and for each
level act_as_list?
class Category < ActiveRecord::Base
acts_as_tree :order => :position
acts_as_list :scope => :parent_id
end
Thanks,
Peter
2007 Jan 31
2
has_many :conditions
Is it possible to put conditions relative to the current instance in
has_many''s :conditions?
For example, in a forum app:
class Post < ActiveRecord::Base
belongs_to :topic
has_many :self_and_descendants, :class_name => "Post", :order =>
"lft",
:conditions => "topic_id = #{topic_id} AND (lft BETWEEN #{lft} AND
#{rgt})"
end
With the
2005 Mar 08
1
To convert an adjacency list model into a nested set model
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
/ \
/
2006 May 31
1
Help enhancing acts_as_nested_set
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,
2010 May 12
3
Best Gem For Threaded Comment Storage?
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
2006 Jan 16
2
acts_as_tree with Modified Preorder Traversal?
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
2006 May 30
2
acts_as_tree, acts_as_list and is invincible (help!)
So I have the following model
class Topic < ActiveRecord::Base
belongs_to :topic
has_many :topics, :order => :position
acts_as_tree :order => :position
acts_as_list :scope => :topic_id
end
that I use for a site''s navigation. Everything (list, create, edit, even
the drag&drop sort) works fine, except the destroy function, which the
vanilla version
def destroy
2008 Jan 27
0
Using acts_as_list, acts_as_tree, and STI in one model
Check it out y''all:
http://rafb.net/p/NJg5U147.html
(pastie was down)
I''m trying to make a tree which belongs_to another model, where you can
have sections or items as children, and sections can have sections or
items as well. Moreover, any siblings should be sortable.
For instance:
Root
- Section 1
- - Item A
- - Item B
- Item C
- Section 2
- - Item D
- - Section 3
- - - Item
2006 Jun 19
3
Using set_primary_key breaks acts_as_tree with non-integer column
I just switched from using the standard "id" column into using my own
primary key and generating my own unique id for each record. But, this
breaks acts_as_tree.
Because my new primary key is not an integer, it breaks the SQL query
as follows:
StatementInvalid in PagesController#create
--------------------------------------------------------------------------------------
2006 Feb 22
9
acts_as_habtm_list plugin
I''d like to announce acts_as_habtm_list plugin for rails.
acts_as_habtm_list is a Ruby on Rails plugin, that can manage ordered
lists through a join-table. It is providing almost the same Api as
acts_as_list. The position column has to be defined in the join table.
You can find additional information at:
http://www.inlet-media.de/acts_as_habtm_list/
Install it executing this command
2006 Feb 06
3
acts_as_threaded plugin
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