[Rails-core] ActiveModel::ValueObject

Hi guys Seeing `composed_of` removed I put together a quick proof-of-concept ValueObject implementation on top of ActiveModel and ActiveRecord `serialize`. https://gist.github.com/3070184 Features: - VO's are immutable - VO's are identified by their attributes - VO's can be conveniently

[Rails-core] URL ID

Many users try to overwrite the to_param method of AR to add more expressivness and value of Seo to the url using something like the following: def to_param id.to_s + title. parameterize + '-' + author. parameterize end That generate url like that: http://host/books/10-goodbook-guest