similar to: Use a value from a different model

Hello, I need to remove columns in a matrix. The number of columns varies from 0 to n. I can't figure out how to specify the zero case. aa <-matrix(runif(5^2),5,5) #remove column 3 aa[,-3] #remove no column aa[,-NULL] Error in -NULL : invalid argument to unary operator I know I could use ifelse, but it would complicate my model a lot. Is there a direct way to

Hi guys, I am a bit stuck here, I know the following is damn wrong, but I couldn''t figure out a cleaner solution yet. I have a bunch of images, each one has a published date and a ''liked'' number. A user can click like from an image once. The index of the images can be sorted after ''liked'', and ''published''. The show from an image has

I am using JRuby and I have to deploy on Tomcat. My web app is working fine in the dev envirmonment, with Mongel, but when I deploy on Tomcat I get "We''re sorry, but something went wrong on Tomcat". The problem is that production.log only shows: # Logfile created on Mon Oct 12 12:54:36 +0100 2009-bash-3.00 The file permission and directory are 777. Any idea how I can

I have a category list which the customer wants administratively to define the sort order, instead of alphabetical or whatever. The obvious approach seems to be to put a sort_order int on the record and use this as the presentation sort order. Then to shift the item up in the sort order to swap the current and the prevous item in the sort_order. Does this seem like a sensible approach, or is

I''ve created a table in a SQL Server database using a migration, successfully. I''ve tried to change the name of a column in the table and got the error message above when running ''rake db:migrate''. Previously I have developed using MySQL and Sqlite and migrations have worked successfully. This is an error I have not seen before. Has anybody seen this and worked

Hey guys, As most of you know, Rails 3.1 introduces query caching for ActiveRecord. Great change all-in-all, but for those of us with IT department mandates for using MySQL (yeah, yeah, I know...), it''s kind of a mixed bag. I need to disable query caching in a project I''m building based on 3.1. I''ve tried a couple different approaches, both without any success. I

Hi All, Rails code must be readable, formatted and well indented. I wanted to do indent code in my previous projects. Is there any built in rails plugin/gem that can help me to indent my existing code. Any ideas will be really appreciated ! NOTE: Please don''t suggest editor plugins. Thanks & Regards, Sandip R~ -- Ruby on Rails Developer http://sandip.sosblog.com

I am creating a rails app that is a gui wraping a restful web service that uses a websso for authentication. This websso sets a series of headers that I need to pass from the request to the ActiveResource.find methods. As this is stuff like username etc it is going to be different for each request. I can find examples on how to set headers for all requests not just one. Does anyone know of a way

hi , I have started to learn ruby on rails and I''m an absolute beginner . when I try to rake a database like "rake db:schema:dump " I get this message : "rake aborted ! unknown database ''cms_development'' " although I have modified my database.yml and have created my database before. I''ll be appreciated if someone can help me with this thanks

Problem: Mongrel cannot start because access to log is denied. I just switched to a new development laptop (Snow Leopard). I think I installed everything I needed. I git clone the application I am developing from the repository. Everything went fine. Now when I run script/server, this is what I get: => Booting Mongrel => Rails 2.3.5 application starting on http://0.0.0.0:3000

The form is inside a table, enclosing a <tr> = form_tag admins_backoffice_dashboards_path, :remote =>"true" do %tr.search %th= link_to t(:clear), "#", :id => :clearFilter %th= select_tag :role, options_from_collection_for_select(Role.global, :id, :name, :selected => @role_id ) %th= text_field_tag :email, nil, :value

I''ve just moved a rails site across to a test server from my development PC. I''ve frozen rails and put all the relevant gems into the vendor/gems directory too. I''ve migrated the mysql database and configured Apache with Phusion Passenger. I can access the site and the content is fine. The formatting however, has disappeared - it''s as though the css file does

Hi Guys I''d like to know how to change from using sqlite3 to mysql. I''m running windows xp. What is the command that I must type under my application folder? How to I log into the mysql database afterwards? My database.yml file contents at the moment are: # SQLite version 3.x # gem install sqlite3-ruby (not necessary on OS X Leopard) development: adapter: sqlite3

Hi, I am trying to implement a few queries now. What are good ways to do this? Right now, I have a list page that does sorting and can carry out a generic pagination request. @user_result_pages, @user_results = paginate(:user_results, :per_page => 20, :conditions => @condition, :order_by => @sort_order) I create @sort_order earlier in the list function. The problem I am having is

Hey all, Chronic will parse a date range in console: Chronic.parse(1/1/2011 - 1/1/2012, :guess => false) => 2012-01-01 12:00:00 -0500..2012-01-01 12:00:01 -0500 However, when I use logger to check if it''s parsing in application, it is not: logger.info "The value of history date is #{history_date}" => The value of history date is 1/1/2011 - 1/1/2012

Hy, I''m using InstantRails for my RoR developments and it is really great. However I have a little problem since a few days. Here is the situation, I''m using InstantRails 2.0 with PHP 5.2.6 (I upgraded following the InstantRails procedure). I''m using MySQL as a database for my application but recently downloaded a forum (FluxBB) which need SQLite to work. My problem is

Hi Is there any freeware anybody would recommend for showing database models and how they relate to each other? I''m picking up an app another developer left in a mess and I''m trying to sort it out. Diagrams would be a great help. Suggestions? -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this

Can anyone tell me which RailsInstaller version was the last one that provided Rails 2.3.x ? The release notes are a bit skimpy :-) but I need to help someone on Windows get set up to work on a legacy app. TIA, -- Hassan Schroeder ------------------------ hassan.schroeder-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org http://about.me/hassanschroeder twitter: @hassan -- You received this message

This page - <http://www.mailchimp.com/api/downloads/> - lists five gems/plugins for interacting with the MailChimp service, and for all I know there are others. Anyone have a personal recommendation? Based on any of stability, ease of integration, completeness, whatever... TIA, -- Hassan Schroeder ------------------------ hassan.schroeder-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org twitter:

Hey Ilio, I revisited the previous code i posted to you and fixed some things. This should let you collect as many studies as you like, controlled by the num_studies arg. If you try the below url in your browser you can see that it returns a "simpler" version of the link you posted. To get to this you need to hit F12 to open Developer Tools --> go to Network tab and click on the