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class Eye < ActiveRecord::Base
attr_reader :after_create_callbacks_stack
attr_reader :after_update_callbacks_stack
attr_reader :after_save_callbacks_stack
# Callbacks configured before the ones has_one sets up.
after_create :trace_after_create
after_update :trace_after_update
after_save :trace_after_save
has_one :iris
accepts_nested_attributes_for :iris
# Callbacks configured after the ones has_one sets up.
after_create :trace_after_create2
after_update :trace_after_update2
after_save :trace_after_save2
def trace_after_create
(@after_create_callbacks_stack ||= []) << !iris.persisted?
end
alias trace_after_create2 trace_after_create
def trace_after_update
(@after_update_callbacks_stack ||= []) << iris.changed?
end
alias trace_after_update2 trace_after_update
def trace_after_save
(@after_save_callbacks_stack ||= []) << iris.changed?
end
alias trace_after_save2 trace_after_save
end
class Iris < ActiveRecord::Base
belongs_to :eye
end
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