Module: CanHasState::Machine::ClassMethods

Defined in:
lib/can_has_state/machine.rb

Instance Method Summary collapse

Instance Method Details

#extend_state_machine(column, &block) ⇒ Object 



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# File 'lib/can_has_state/machine.rb', line 21

def extend_state_machine(column, &block)
  column = column.to_sym
  sm = state_machines[column] || raise(ArgumentError, "Unknown state machine #{column}")

  # handle when sm is inherited from a parent class
  if sm.parent_context != self
    sm = sm.dup
    sm.parent_context = self
    self.state_machines = state_machines.merge(column => sm)
  end

  sm.extend_machine(&block)
  column
end

#state_machine(column, &block) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/can_has_state/machine.rb', line 7

def state_machine(column, &block)
  column = column.to_sym
  raise(ArgumentError, "State machine for #{column} already exists") if state_machines.key?(column)

  d = Definition.new(column, self, &block)

  define_method "allow_#{column}?" do |to|
    state_machine_allow?(column.to_sym, to.to_s)
  end

  self.state_machines = state_machines.merge(column => d)
  column
end