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Contents
module StateMachine
module Integrations #:nodoc:
module ActiveModel
# Represents the encapsulation of all of the details to be included in an
# update to state machine observers. This allows multiple arguments to
# get passed to an observer method (instead of just a single +object+)
# while still respecting the way in which ActiveModel checks for the
# object's list of observers.
class ObserverUpdate
# The method to invoke on the observer
attr_reader :method
# The object being transitioned
attr_reader :object
# The transition being run
attr_reader :transition
def initialize(method, object, transition) #:nodoc:
@method, @object, @transition = method, object, transition
end
# The arguments to pass into the method
def args
[object, transition]
end
# The class of the object being transitioned. Normally the object
# getting passed into observer methods is the actual instance of the
# ActiveModel class. ActiveModel uses that instance's class to check
# for enabled / disabled observers.
#
# Since state_machine is passing an ObserverUpdate instance into observer
# methods, +class+ needs to be overridden so that ActiveModel can still
# get access to the enabled / disabled observers.
def class
object.class
end
end
end
end
end
Version data entries
14 entries across 14 versions & 9 rubygems