module StateMachine::MatcherHelpers
Provides a set of helper methods for generating matchers
Public Instance Methods
all()
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Represents a state that matches all known states in a machine.
Examples¶ ↑
class Vehicle state_machine do before_transition any => :parked, :do => lambda {...} before_transition all - :parked => all - :idling, :do => lambda {} event :park transition all => :parked end event :crash transition all - :parked => :stalled end end end
In the above example, all
will match the following states
since they are known:
-
parked
-
stalled
-
idling
# File lib/state_machine/matcher_helpers.rb, line 28 def all AllMatcher.instance end
Also aliased as: any
same()
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Represents a state that matches the original from
state. This
is useful for defining transitions which are loopbacks.
Examples¶ ↑
class Vehicle state_machine do event :ignite transition [:idling, :first_gear] => same end end end
In the above example, same
will match whichever the from state
is. In the case of the ignite
event, it is essential the same
as the following:
transition :parked => :parked, :first_gear => :first_gear
# File lib/state_machine/matcher_helpers.rb, line 50 def same LoopbackMatcher.instance end