I have a product model that has many sections, and a section can belong to many products. The section model has subclasses of Feature, Standard and Option. My models are: class Product < Acti...

I have a module that I'm including in several models with this content: self.class.find_by_foo(bar) Everything was fine until I started using STI. That line should always generate the query se...

I would like to be able to call the build method on a scope that targets a certain class of model via its STI type, and have ActiveRecord build an instance of the correct class. class LineItem &lt...

I'm trying to figure out the best way to manage my controller(s) and models for a particular use case. I'm building a review system where a User may build a review of several distinct types with a...

I think I need to use STI in Rails. Here's my class: class Person < ActiveRecord::Base end class Landlord < Person end and the people table has a :type column that's a string. So, what ...

Are there standards or best practices yet when it comes to multi table inheritance in rails 3? So far the best article I could find was: http://mediumexposure.com/multiple-table-inheritance-active...

I've been banging my head against a wall trying to wrap my head around this, so any guidance would be much appreciated... I want to have a User system setup to reflect the following hierarchy: Us...