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= Active Model - defined interfaces for Rails
Prior to Rails 3.0, if a plugin or gem developer wanted to be able to have
an object interact with Action Pack helpers, it was required to either
copy chunks of code from Rails, or monkey patch entire helpers to make them
handle objects that did not look like Active Record. This generated code
duplication and fragile applications that broke on upgrades.
Active Model is a solution for this problem.
Active Model provides a known set of interfaces that your objects can implement
to then present a common interface to the Action Pack helpers.
You can include functionality from the following modules:
* Callbacks
class MyClass
extend ActiveModel::Callbacks
define_model_callbacks :create
def create
_run_create_callbacks do
# Your create action methods here
end you before_create, around_create and after_create class methods that
wrap your create method.
{Learn more}[link:classes/ActiveModel/CallBacks.html]
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