When using ActiveModel only (not ActiveRecord) ActiveModel::Observing is not defined.

[cabeca]

Hi,

When using ActiveModel only (not ActiveRecord), ActiveModel::Observing and ActiveModel::Observer are not defined because 'rails/observers/active_model/active_model' is not required in Railtie.

As a workaround, I can
require 'rails/observers/active_model/active_model'
before using ActiveModel::Observing, but I think it should be put somewhere in the Railtie.

[rafaelfranca]

This was intentional. If you are not using ActiveRecord you have to require it. Maybe we can create a rails/observers/active_model as alias