Exception: StateMachine::InvalidTransition

Inherits:
Error
  • Object
show all
Defined in:
lib/state_machine/transition.rb

Overview

An invalid transition was attempted

Instance Attribute Summary collapse

Attributes inherited from Error

#object

Instance Method Summary collapse

Constructor Details

#initialize(object, machine, event) ⇒ InvalidTransition

:nodoc:


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# File 'lib/state_machine/transition.rb', line 13

def initialize(object, machine, event) #:nodoc:
  @machine = machine
  @from_state = machine.states.match!(object)
  @from = machine.read(object, :state)
  @event = machine.events.fetch(event)
  errors = machine.errors_for(object)
  
  message = "Cannot transition #{machine.name} via :#{self.event} from #{from_name.inspect}"
  message << " (Reason(s): #{errors})" unless errors.empty?
  super(object, message)
end

Instance Attribute Details

#fromObject (readonly)

The current state value for the machine


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# File 'lib/state_machine/transition.rb', line 11

def from
  @from
end

#machineObject (readonly)

The machine attempting to be transitioned


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# File 'lib/state_machine/transition.rb', line 8

def machine
  @machine
end

Instance Method Details

#eventObject

The event that triggered the failed transition


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# File 'lib/state_machine/transition.rb', line 26

def event
  @event.name
end

#from_nameObject

The name for the current state


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# File 'lib/state_machine/transition.rb', line 36

def from_name
  @from_state.name
end

#qualified_eventObject

The fully-qualified name of the event that triggered the failed transition


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# File 'lib/state_machine/transition.rb', line 31

def qualified_event
  @event.qualified_name
end

#qualified_from_nameObject

The fully-qualified name for the current state


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# File 'lib/state_machine/transition.rb', line 41

def qualified_from_name
  @from_state.qualified_name
end