similar to: Any good alternative to single-table-inheritance?

Running into an interesting problem that at first glance appears to be a bug in the AR association code. However, it''s explicitly coded this way so I''m not so sure. I have some code like this: class Address < ActiveRecord::Base belongs_to :addressable, :polymorphic => true end class Person < ActiveRecord::Base has_many :addresses, :as => :addressable,

I really hope this is not a bad question (as in he''s abusing the list). However I could use a little direction (even though I''m reading books, tutorials) Right now I''m getting a undefined method `category'' for 4:Fixnum The specific lines from the rhtml file are: <td><%= link_to position.category_id.category, :action => "show", :id =>

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 there- I''m a newbie to this board, RoR, and web development in general. So please forgive me if this is in the wrong place or if the solution is really simple... I''m trying to conceptualize the relationships between a series of models for a page creation function. What I''d like is to have a Content Page which consists of a series of Content Blocks. The Content

I''m trying to figure out the Rails way to model the following problem: I have 2 tables. One (let''s call it location) contains a single address. The other (let''s call it company) contains 3 address. I''m trying to figure out the best way to model this. I''ve created an address table, a set up the model as follows: class Address <

The setup: class Location::Base < ActiveRecord::Base set_table_name :locations ... end class Location::Address < Location::Base ... end class Location::Airport < Location::Base ... end class Person < ActiveRecord::Base belongs_to :location, :polymorphic => true, :class_name => "Location::Base" ... end I want a unidirectional belongs_to relationship. That

Hi, currently I do some work with polymorphic associations in egde rails class Order < ActiveRecord::Base belongs_to :payment, :polymorphic => true end class CreditCardPayment < Payment end class PayPalPayment < Payment end class Payment < ActiveRecord::Base has_one :order, :as => :payment # common stuff in here end I want to use [Payment] for common functionality

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

Hey guys, I just implemented very simple and primitive class table inheritance in ActiveRecord. The goal is for this to become mature enough to become a true feature in Rails. Check it out here: http://guest@blog.raylucke.com/svn/inherits_from Here?s how it looks in action: create_table "books", :force => true do |t| t.column "product_id", :integer t.column

I''m running script/console but keep getting the message that irb.bat is not recognized as an internal or external command, operable program or batch file. If it means anything I am running instant rails. I can invoke irb straight forward. TIA Stuart -------------- next part -------------- An HTML attachment was scrubbed... URL:

I''ve been searching the web, wikis, and more, and I haven''t turned up examples of how to have multiple entities in a single-table inheritance related to anything. I have an addresses table, but multiple entities can have Addresses: both Person (which has 2 addresses) and Retailer. I''ve been told that I need to use single-table inheritance, and this was my attempt:

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

I am very confused about where to put the belongs_to and the has_one (and other relationship identifiers). I have read the RDoc and the agile book many times about this and I think i still see it backwards. Let me outline my app so you have an understanding... I have 2 tables: Schools { id, school_name, address_id } and Addresses { street1, street2, city, state, zip, country } *** this

I was brainstorming today about a smooth way to define conditions in an sql query, when the numbers of attributes increase, so does the uglyness. So instead of passing a hash, I thought you could specify the conditions directly in code. I hacked together some example code which actually turned out to work. The result is concise and pretty beutiful. def search(params) Ad.find(:all) do

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

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 Let''s say we set session[:foo] = ''bar''. Now we want to remove the :foo key completely. How do you do that? Appearantly, session is a CGI::Session [1] instance, so it doesn''t have #delete like Hash. I tried: session[:foo] = nil But then debug(session) shows an empty :foo key. I''d like to remove that key, as my session is already pretty crowded. Is

I have the following models: class Card < ActiveRecord::Base belongs_to :deck belongs_to :front, :polymorphic => true belongs_to :back, :polymorphic => true end class TextContent < ActiveRecord::Base has_one :card, :as => :front has_one :card, :as => :back end The conflicting has_one declarations don''t work. What I need is

Hi, seem to keep running into a wall here. I can''t find any resources on site navigation that can deal with any model being in the nav, allow nesting, and can dynamically update. So I thought about it for a while, and decided on a MenuItems class, which contained the position of the child in relation to it''s siblings, where the parent and the child were polymorphic. Then a given

This is going back to something I had asked on IRC about a few weeks ago and promised to get back to when I had some time to actually work on it. For background: Currently, we can annotate tbaa on memcpy's, but when we do so, the semantics consider it to apply to *both* the load and the store part of the memcpy. This is quite a significant limitation and the cause of a good amount of lost