Still should work. Depending on what you are doing with your validations, you might be able to just include ActiveModel::Model and attr_accessors, then validates :email, presence: true, etc...
wizard2011: It's usually better to just ask a question, and if someone has something relevant to say, they'll respond. Otherwise it sounds like you are asking someone to agree to help without them even knowing what they are going to help with and what kind of time commitment that would entail.
Anyone have any recommendations for books/tutorials for the data modeling side of ERP (enterprise resource planning)?
I follow style guides pretty closely, since it improves readability if an entire project uses the same style, but I would like to see a style guide with at least attempts at justifying each guideline.