similar to: save new model with child model

Hi, I want to start using has_many :through. I think that eventually I''ll be removing all uses has_and_belongs_to_many from my project. Here is my situation I''m using SVN I want to use edge rails Reading the wiki about switching to edge rails[1], I can''t figure out which combination of subsections I must perform. Do I want edge rails to reside in the vendor

Hi, I would like my model instance to produce it''s own list of options for a form select. This is from a product model that has_many variations def alts_for_select(current_id) the_map = variations.map{|v| [v.name, v.id]} options_for_select(the_map, current_id) end the model cannot see the options_for_select method I tried to use

Hi, What is the simplest way to validate a positive integer? validates_numericality_of :foo, :integer_only => true how do I add the positive part? Do I need another validation statement for pattern matching or do I have to write a validate() funciton for my model? Thanks, Peter

I''ve been working with rails for a while now. Rails is the second web framework I''ve tried. It blows the doors off catalyst (perl''s best framework). I even just wrote my first plugin (broomstick). Ruby''s ability to meta-program blew me away with it''s ease of use. I''ve been so impressed with the helpers that rails uses to make a lot of

I''ve read the stuff about polymorphic associations here: http://wiki.rubyonrails.org/rails/pages/UnderstandingPolymorphicAssociations But I''m not sure what exactly they are and what their advantage is. Are they the same as HABTM, but they''re "two-way"? Joe -- Posted via http://www.ruby-forum.com/.

Hi, I''m interested in using a currency conversion web service in my rails app. Does anyone have a free service that they use and like? I found this one http://www.webservicex.net/WS/WSDetails.aspx?CATID=2&WSID=10 I''ve tried to make a simple, plain Ruby script to connect to this and get a conversion rate without success. How do I integrate a webservice into my rails app? I

Hi, A store front a customer wants to GET /product/5/show. But for the application this is really GET /cart_item/new/5 or even better /cart_item/new?cart_item[product_id]=5 When the customer clicks add_to_cart they POST /product/5/show so that the url doesn''t confuse the user when any validation errors occur. But for the applicaiton this should be POST

Hi, I''ve read the Agile Rails book''s chapter on ActionMailer a few times. Seems pretty straight forward. Unfortunately I can''t get my application to actually send mail. I uploaded my application to the web server and tried to get a mail message sent. Nothing happened. I looked in the log file and it says Sent mail: From: service@freedomkilts.com To:

Given the following class Programmer < ActiveRecord::Base has_many :assignments has_many :projects, :through => :assignments end if I call Programmer#projects.clear, it will delete_all the joining assignments; however, I have a situation where I''d like the assignments to get destroyed instead so that their after_destroy callbacks get called. It would be simple to

Hi, I am changing a very standard old school website to rails. When I make the change to rails, all of the old urls will not be valid. If a person has a bookmark to an old web page I would like them to be directed to the front page of the new website www.domain.com. How do I do this? Do I do something in routes.rb? Thanks, Peter

Hi, I''ve been confused about the purpose of _marker in dragdrop.js for quite a while. It doesn''t really look like it does anything with ghosting on or off. I removed the mark method and didn''t discover any problems. Is all the mark business a relic from some past idea? Thanks, Peter

Hi, How do I make an image that is a clickable link the rails way? Is there a view helper for this? Thanks, Peter

Hi, Which FTP client would fit in nicely with OS X and Textmate. Thanks, Peter

I''m trying to figure out an elegant way to do this: I have the following three tables: people, employer, employees And consequently the following three models: class Person < ActiveRecord::Base end class Employer < ActiveRecord::Base has_many :employees end class Employee < ActiveRecord::Base belongs_to :person belongs_to :employer end I want to be able to say:

OK - I know this has been asked before, but I cannot find it in the archives. Forgive me if I''m creating more noise than I should. I want to know the easiest way to deal with this scenario: I have articles. I have categories for the articles. On the form where you write an article, there needs to be a free-form field to entire the category. The create() method will build the

Hi, In my web application, a users browser is divided into more than one panel. Each panel is filled with html from an ajax response based on what the user would like to view. Perhaps the details of a category and it''s associated products in one panel and a list of customer orders with the products of each order in another panel. Two panels might be the same. Two users may be viewing the

Hi, I am trying to convert a hash to JSON using ActiveSupports built in .to_json. I am doing similar to the example below but are there certain strings that could go in place of ''bar'' or ''rez'' that will break the to_json method? I am using a very long string from rjs output in place of ''bar''. Perhaps .to_json is not ready yet? Thanks, Peter

Hi, I''ve been doing a lot of rewriting of dragdrop.js. I''ve covered at least eight open tickets, made multiple selection of draggables, droppables can accept multiple items at a time, added 21 consistently-named callbacks and have reorganized the code. I''m working on adding more things to Sortable now. I''m no JavaScript expert, this is my first project, and I

Does anyone know where I could get text file with the code from the famous video where they create a Weblog in 15 minutes -- The one that''s here: href="http://rubyonrails.com/screencasts? (I can''t just watch it here at work, and I''d like to avoid having to re-type everything in any case.) Thanks! -- Posted via http://www.ruby-forum.com/.

Assume a model Parent and another model Child. Child belongs_to Parent and Parent has_many Children. The following fails: @ p = Parent.find(:first) assert p.equal?(p.children[0].parent) @ It seems odd to me that I and my child''s parent are not the same object. In fact, this is royally screwing me up. Can anyone tell me why this is or point me at a relevant discussion, blog posting,