similar to: How do you delete a session variable?

I''m looking to implement model inheritance in a new application. Is there any good alternative to single-table-inheritance? -- -Alder

Hello, I am attempting to create several plots based on "site" (~300 total) and am having trouble with the code. I simply want to create a plot using the code, plot(year, peak), for the following dataset. I would like for each site to be plotted on a separate page and the plots saved in a directory. Would a "foreach" loop work? I tried a "by" statement, but

Hi I created a custom route that looks like this: map.connect '':controller/:table/:action/:id'' Hierarchically, :table is above :action and :id. So, if we call ActionController::Base#url_for with an argument :table=>nil, we''re supposed to get a url with :action and :id set to nil as well. However, this is not the case: url_for(:table=>nil) from

Hi there I''m considering Rails for a new web-application planned to be built from scratch. The application has an extensive web front, and in fact most of the application is interfaced through that front and engaged through clients'' HTTP requests (i.e. the conventional way web-applications and "dynamic web-sites" work). However, some essential parts are supposed to

So I want to SELECT from multiple tables, so as to be able to do "SELECT FROM foo, bar WHERE foo.id=bar.id AND bar.baz=23". How do I do it with AR#find? Also, I need this for associations. has_many et. al. have :finder_sql, which is nice, but feels like a Pyrrhic: it''s basically doing the association in pure SQL, defeating the purpose of AR. -- -Alder

Hi there I''m planning to build "The Perfect Rails/Debian/Lighttpd Stack", published by Ezra Zygmuntowicz and Sean Schertell at http://brainspl.at/rails_stack.html I''m wondering what sort of constant maintanance that setup would incur. What actions have be regularly performed to keep this setup healthy and secure under normal conditions? Alder

Greetings! I could really use some help understanding what Rails puts into the session store related to the objects it creates. I''ve found documentation on how _I_ can put / get info into it, but can''t find the docs on what _Rails_ puts into it. I''ve got a simple app that collects some data from the user, stores it in a db record, allows the user to edit it, display

File.open in core Ruby is nifty, in that it automagically closes the file when you''re done using/manipulating it. I''m wondering whether there''s something like that for ActiveRecord? So you can do: AR.find(23).open {|ar| ar.foo = ''bar'' ... } And ar.save would be called when the block closes. -- -Alder

Hi there I need to store additional attributes on join table. Searching the Wiki [1] revealed two possible methods: 1) push_with_attributes, as described by Justin Palmer [2]. Unfortunately, "this method is now deprecated" [3]. Even if it wasn''t, there seem to be inherent problems with that approach, for example with updating those additional attributes, though Joshua Muheim

Hi I have an action which saves the originating resource from which it was called, and returns to it later. This is done by setting: session[:return_to] = request.referer ... redirect_to(session[:return_to]) Which works great for GET resources. The problem is that POST variables aren''t kept in request.referer, so this method fails when the originating resource is a a POST.

Hi, I''m trying to delete a file system (<xml_26548975.xml>) File.delete("xml_26548975.xml") But I get this error: "Permission denied - ./script/../config/../uploads/xml_26548975.xml". Why? -- Cheers, ioana k&a http://boulangerie.wordpress.com/ -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi I''m choosing a database for a new Rails application. I pretty much ruled out PostgreSQL, since despite good reviews of the database itself, it seems it has countless issues with Rails (for example: in recent releases migrations don''t work, and unit-tests fail). So I should now choose between MySQL 4.1, which as I understand enjoys widespread popularity - perhaps the most

Hi there, when i do this: session[:myItem] = ''foo'' session[:myItem] = nil the item :myItem is removed from the session. But this: session[''myItem''] = ''foo'' session[''myItem''] = nil doesn''t remove ''myItem'', it''s empty but still in the session. Any suggestion ? Thanks in advance. mic

Hi I was recently taught about the useful ActiveRecord::Base#serialize. It''s very useful for persisting arbitrary objects through the regular database. For example, say you want to store a Set of all the years a Convention took place. You do: class Convention < ActiveRecord::Base serialize :years, Set end This effectively creates a Convention#years attribute, which is a set: you

A concrete example: We''re building a system to organize the information about workshops being held in various conventions. A convention has more than one workshop, and each workshop can be held in more than one convention. Also each workshop has a host, who is specific to a workshop being held in a specific convention. For example, Matz may host an "Introduction to Ruby"

As I, like many people, are coming to ruby in the rails era, I''m curious about how Ruby Web Dev was done prior to rails. Any veterans want to share their insights? -------------- next part -------------- An HTML attachment was scrubbed... URL: http://wrath.rubyonrails.org/pipermail/rails/attachments/20060518/20cde24d/attachment.html

Hi Let''s say we have model Foo. Each Foo instance can have several bars. Those bars are primitive, so they shouldn''t be models. For example, Foo might be a type of convention, and the bars might be years the convention was held in. Naively, we would have a conventions_years date, and put: has_many :years inside class Convention. But then we''d get an error, since for

Hi ActionView::Helpers::FormHelper methods (e.g. #text_field, #check_box...) take object_name as an argument. From this argument they infer a name that is supposed to contains the reference to the relevant object. I can''t see why the FormHelper methods were designed that way. Compared to simply passing them a reference, the current way seems too complicated and an invitation to problems

Hi everyone. I''m choosing an SCM for my current Rails project. Up until now, for my other (non-Rails) codings, I used Darcs and liked it very much. I''d prefer to use Darcs for my Rails development as well. Looking into the matter, I''m somewhat deterred by the appearant dominance of Subversion as the SCM tool of choice for Rails hackers. Is there a technical reason for

Hi. When you have library foo.rb in your Rails project /lib directory, I notice that on some platforms - e.g. Windows with WEBrick as a server - you can require it by simply: require ''lib/foo'' However on other platforms - e.g. Debian with Lighttpd server via FastCGI - this does not work, and you need to specify RAILS_ROOT explicitly, like this: require