similar to: Models and Modules and subclassing, oh my!

I''m trying using STI to implement a hiearchy similar to this: script/generate scaffold name:string type:string class Person < ActiveRecord::Base; end class Customer < Person; end class Employee < Person; end class Developer < Employee; end I.e., there are two levels of inheritance (Developer < Employee < Person). When creating a Customer, Rails understands

I''m getting some weirdness trying to use a select widget to choose the type from a collection of three objects sharing a database table via single-table inheritance (STI). I''d be grateful for any advice on whether it''s a bug or a feature, if a feature why and how I can more easily do what I''m trying to do. So I have the usual STI setup, with a

I just launched two Rails projects that I''ve been sitting on for a while. The first is JobsOnRails.com, which I announced here back in March. After the 37''s created their nifty job board I decided to shelve mine, but have launched it anyway because it was just about finished. There isn''t much on it right now, but it''s free and has a fun domain, so if

ActiveSupport provides a method Object.subclasses_of, shown below: def subclasses_of(*superclasses) subclasses = [] ObjectSpace.each_object(Class) do |k| next if (k.ancestors & superclasses).empty? || superclasses.include?(k) || k.to_s.include?("::") || subclasses.include?(k) subclasses << k end subclasses end Can anyone shine some light on why

Hi, looking to see if I''m on the right track here... we''re selling widgets to customers, but there are a number of different type of widgets and each different type of widget has a number of parameters that the customer can specify, in effect each customer orders widget''s customised in ways particular to that specific order. We use STI to store each different widget

Hi, I''m sure there is an easy way to do this, but I just can''t see it: I have a large amount of rooms, that are for different purposes, and for only one ''purpose'' do I want to create a specific subclass. Ex: banquet,wedding,admin. I want to have additional information about admin rooms. Trying to use the ''type'' field just gives an error

Hi, I''m using prototype/Scriptaculous in my open source project JSControlsTags http://jscontrolstags.sourceforge.net/ I''m Struts user and in the new version Struts2, the framework integrate AJAX with dojo and not with Prototype/Scriptaculous. I asked in the Struts forum, why Struts2 integrate by default dojo and not scriptaculous. Here Struts answer : ------------------------

Folks, I''m fairly new to Rails, and I''ve Googled around for an answer to this question with no luck... Consider a little blog application that has uses single-table inheritance for the handful of different content types via a Content base class and subclasses like FooContent and BarContent. That part all works well for me. Now consider the view that presents actions to the

I was trying to add some stronger assertions in the verifier around !tbaa metadata when I ran into an ambiguity: I think the encoding of the metadata nodes are such that a given node can be interpreted as either a struct type node or a scalar tbaa node. I'd like a sanity check before I try to fix or work around this. Consider some IR that I got from running clang over a small C++ program:

ActiveSupport provides a method Object.subclasses_of, to give the subclasses of a given class. However, it ignores any subclass within a module, so : class A end class B < A end Object.subclasses_of(A) # returns [B] module C class D < A end end Object.subclasses_of(A) # returns [B], even though C::D is also a subclass of A class E < C::D end Object.subclasses_of(A) # returns

I have a STI class tree. I want to set some default values (calculated values so I can''t set it in the database as defaults) on every created instance regardless of what subclass is actually instantiated. So I figured adding a after_create callback in the top class in the hierarchy should do the trick. It seems it doesn''t get called :( Code: class SuperClass <

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><style type="text/css"><!-- #msg dl { border: 1px #006 solid; background: #369; padding:

We are creating a simple widget portal for our site and trying to use Sortables. Each of our widgets is an iframe. But when you try to drag an element containing an iframe the Sortables api causes the iframe to reload at each possible drop point. This causes the ui to shutter and become unusable. I have narrowed the issue down the onEmptyHover where dropon.insertBefore is called. Is there a

I have an STI model where UtilityProvider is the parent class, and there''s a sub-class for each specific utility provider. When the user goes to choose a UtilityProvider, I want to present a pull-down list of UtilityProvider.subclasses (or, more likely, a filtered version of that), and when the user hits [submit] to create the appropriate subclass. To add a little spice to the question,

Hi! I have a legacy table that has a column named "type" and need to remove this automatic subclassing by ActiveRecord. The api pages are vague about this, and I tried self.inheritance_column = "xtype" which seemed to get me half-way. In the validate_on_create method, the value of self.type was my model Class name. How would you disable this feature? -- Posted via

Hi, I think it would be great if we could subclass the LayoutPass. All the generic functionality could be in the parent to run the layout-after/in-group/ and currently the layout-before passes(until it gets removed). Flavors can *choose to run the layout passes* that they use and determine the way things get ordered in the layout pass. The compare function in the LayoutPass would call

Is it possible to define a subclass for a model, that defines additional data columns, which are stored in a separate table? Is there any description, how to do this? -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to

Hey all, I have two models in my rails project that share a lot of traits. They each have the same 4 properties, and now I need to add 2-3 methods to each one that will be the same. In the spirit of DRY I am looking for a solution to write these methods only once. Both of these models already inherit from ActiveRecord . . . and I didn''t know if it was safe to just "whip up" a

All, My apologies if this is a little long-winded and stream of consciousness-y :). SUMMARY: Why do we extend ActiveRecord instead of mixing it in to our model classes? Been thinking about my app''s models and starting to want to build something of a hierarchy. I have some commonality across 3 of my model classes and I''d liek to aggregate the behavior in a superclass.

Hello all and hoping for some insight a project manger type of application, staff are assigned to projects, but each staff has varied roles for different projects... STI does not seem to be applicable here Imagine a table staffs... id int name varchar blah.... is_manager int 1 is_engineer int 1 is_producer int 1 and projects... id name manager_id engineer_id producer_id how is the best way