Comments on: Rails Single Table Inheritance

By: Geek Mama » Blog Archive » The TYPE Column

Geek Mama » Blog Archive » The TYPE Column — Fri, 14 Aug 2009 20:56:57 +0000

[...] to get the most out of your table relationships at guides.rubyonrails.org. And I ran across a post by Techknow that does a great job of describing Single Table [...]

By: Cookie

Cookie — Tue, 21 Jul 2009 10:04:30 +0000

Can we put all the inherited models in the same file along with the parent class? When I try to do model.singularize.classify.constantize, I get a “Uninitialized contant model”. Weird thing is, it works okay on the console, but not when I run the app. Thanks

By: Jolmash

Jolmash — Sat, 13 Jun 2009 20:33:37 +0000

I have some question, I’d thank you guys if you can help me, I have the same question than Pratik: how do you handle custom attributes for each role? I wouldn’t like to have one table per role. another question is: could the type column be replaced by a dynamic attribute in the model? thanks in advance

By: Pratik

Pratik — Sun, 07 Jun 2009 21:06:09 +0000

Thanks for the information. Can i create a separate table for Administrator and Editor if i want to store custom attributes. I mean the attributes for Administrator and Editor which are not generic and cannot be fitted into the User model.

By: don

don — Thu, 26 Mar 2009 09:24:41 +0000

The Administrator model can inherit from either Editor or User. If it inherits from Editor, it has all of the privileges of Editor, so it makes more sense to inherit from it.

By: mitch

mitch — Tue, 24 Mar 2009 04:03:55 +0000

Hi. Thanks for the post.

One point: Shouldn’t your Administrator model inherit from User? It is inheriting from Editor in your example.

By: LG

LG — Mon, 23 Mar 2009 17:45:01 +0000

It looks like to_xml does weird stuff with STI. Consider

user = User.find(3)
puts user.class

This gives Administrator as above. However, then do

user.to_xml

It comes back looking like:

Barb
…

I want to have the outer XML wrapper still be and have administrator inside the XML as a or something. Any way to do that without writing a substitute to_xml function?

TIA

By: adit

adit — Thu, 27 Nov 2008 06:35:44 +0000

thank’s for the explain

i just realize STI in ruby on rails is very simple, and the part i like is, it don’t need to create additional table, just create additional model

By: 4 Essential & 7 Optional Ruby on Rails Tutorials « BendTheBlock

4 Essential & 7 Optional Ruby on Rails Tutorials « BendTheBlock — Thu, 24 Jul 2008 14:00:52 +0000

[...] 6. OO Inheritance (RoR supports Single Table Inheritance) - Rails Single Table Inheritance[...]

By: Chemica

Chemica — Fri, 14 Dec 2007 15:24:14 +0000

Crisp, clear and to the point. Ever thought of writing for the RoR Wiki? ;)