similar to: Eager loading wierdness

Hello. Using the ":include", which generates a "LEFT OUTER JOIN" SQL command, it is possible to eagerly preload second order data objects (children) for a given association. I wanted to know, if it is possible to eagerly preload and cache third order (or more) data objects, which are little-children or little-little-children. As I''ve seen. it is possible to add

I''ve been trying to use the ez_where plugin to create a dynamic finder. The structure looks somehing like this.. === controller === def list attribute_filter = params[:filter] @filter = Caboose::EZ::Condition.new :table do attribute <=> attribute_filter if attribute_filter end # ... do the find with the @filter # end === view === .... <%= link_to

Hi. Assume you have an array of person names. I want to generate results in my view that look like this: Abby is your friend or Abby, Bob, and Carol are your friends. So I''d like to say: <%= friends.to_sentence %> <%= pluralize(friends.count, "is") %> your <%= pluralize(friends.count, "friend") %> But because pluralize puts in the

Here are a couple of articles I wrote describing a couple of handy helpers for dealing with polymorphic objects. These helpers allow you to generate urls and render partials on objects without knowing what class they are ahead of time. http://www.sciwerks.com/blog/2006/05/24/polymorphic-urls/ http://www.sciwerks.com/blog/2006/05/24/polymorphic-partials/ Hopefully you will find them useful.

Just a quick pointer to some ActiveSupport patches hoping for reviews: Puts Array#to_query and Object#to_query in the right places in ActiveSupport - http://dev.rubyonrails.org/ticket/10395 Preserve user-specified content type for XML and JSON rendering (currently it''s overridden and set to Mime::XML/Mimi::JSON - http://dev.rubyonrails.org/ticket/10388 Oh and a tiny patch for

Greetings all, I have a side panel in my app that needs to have a link to the most recent 4 or 5 items in a table. How do I create this link? For example, I have a controller named widgets, and I want to create a link to :controller => "widgets", :action => "show", and then the most recent id. I want the text link to be the name of the widget. Any ideas? Obviously,

Has anyone tried to create a tri-state or multi-state checkbox control for rails? What I''m looking for is a control that will cycle through a series of states when clicked. Like ''No'' -> ''Maybe'' -> ''Yes'' -> ''No'' .... _Kevin www.sciwerks.com -- Posted with http://DevLists.com. Sign up and save your

As part of an application I am developing, I have been delving into the dark art of Rails testing. Since the existing literature on the topic is a bit sparse, I have written up a couple of brief articles on testing strategies for rails. The first one is on the usefulness of ''Positive and Negative Controls'', and the other is a simple way to make sure you are working with

Is there any way to set a field name that is different than the method name used to populate it? My example: In Rails, I''m using acts_as_ferret on a Article model that has_many Authors. I want to be able to index authors'' names with each article. Since @article.authors yields an array of Author objects (and not an indexable string), I''ve created this method in my

I have a collection of check_box_tags that look like the following: <% for item in @items %> <%= check_box_tag "item[item_ids][]", item.id, false, {:onchange => remote_function(:url => update_items_path, :with => "''items='' + escape(value) "} %> <%= item.name %> <% end %> My question is, how do I send all of the current

Hi, I want to make a flash[] highlighted for let''s say 5 seconds when some action is invoked. In the controller, I have: flash[:notice] = "error" In the layout, I have: <p style="color: white"><%= flash[:notice] %></p> I don''t know how to use ajax with the flash. I tried something like: element.highlight(flash[:notice]) without any

Hello, how can I check if a destroy was successful? Is the object only frozen if deleted or do I have to do an additional find to see if there is a record left? What happens if an after_destroy callback returns false? Is there always a rollback? Markus

HI, I have the list: > suu [[1]] NULL [[2]] NULL [[3]] item_id prod 1 2 [[4]] item_id prod 1 2 2 4 how to delete all "NULL" elements from suu to get only >suu [[3]] item_id prod 1 2 [[4]] item_id prod 1 2 2 4 ?? Kind regards, Tammy [[alternative HTML version deleted]]

All, I have a form with the following field interaction rules. Given checkbox A, text field B text field C If checkbox A is checked then make text field C equal to the value of text field B and disable field C. If checkbox A is unchecked then enable field C. In order to display a form where I''m manipulating an already existing object, I have something like this in my RHTML template

Hi, Just get started with Rails and I''m trying to read ahead and find out whether Active Record supports auto-creation of database tables for you? Is this supported, or is the concept that you write your own database DDL to do this? Thanks -- Posted via http://www.ruby-forum.com/.

There is a dedicated section about eager loading in the docs. A coworker discovered eager loading does not work in polymorphic associations the hard way :-) so I''ve written a patch that documents it: http://dev.rubyonrails.org/ticket/10610 There are at least a couple of tickets that implement something that would change that though: http://dev.rubyonrails.org/ticket/9640

Hi Trying to cut down on queries with eager loading and noticed the following in development.log Load IDs For Limited Eager Loading - SELECT id ....etc Followed by Load Including Associations - SELECT table.id ... etc Is this common practice? What is limted eager loading? Cheers Mark -- Posted via http://www.ruby-forum.com/.

Polymorphic associations work great until I try to do some eager loading through :include. In my example, the interface name is ":imagehaver". Here''s my little eagerly loading find line: Image.find(params[:id], :include => :imagehaver) All it gives me is an ActiveRecord::EagerLoadPolymorphicError with no further explanation. I haven''t been able to dig up anything

What is the best way to create a drop down where the viewable text in a concatenation of 2 or more columns? For instance, I hane a lookup table with these columns. Model FOO columns: id , name, phone In my drop select tag, I''d like the user to see: "name1 phone1" "name2 phone2" etc.. I know I can do this using find_by_sql . .. But, isn''t there a more

Hey all, I''d really appreciate some eyes on https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/5845-activerecord-3-eager-loading-fail#ticket-5845-19. There''s a small issue in Rails 3 eager loading, and this ticket has an accompanying patch. Sssociations that show up twice in a Relation chain like: Article.includes(:comments).includes(:comments =>