Method: StateMachine::StateCollection#by_priority

Defined in:
lib/state_machine/state_collection.rb

#by_priority ⇒ Object

Gets the order in which states should be displayed based on where they were first referenced. This will order states in the following priority:

  1. Initial state

  2. Event transitions (:from, :except_from, :to, :except_to options)

  3. States with behaviors

  4. States referenced via state or other_states

  5. States referenced in callbacks

This order will determine how the GraphViz visualizations are rendered.



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# File 'lib/state_machine/state_collection.rb', line 93

def by_priority
  order = select {|state| state.initial}.map {|state| state.name}
  
  machine.events.each {|event| order += event.known_states}
  order += select {|state| state.methods.any?}.map {|state| state.name}
  order += keys(:name) - machine.callbacks.values.flatten.map {|callback| callback.known_states}.flatten
  order += keys(:name)
  
  order.uniq!
  order.map! {|name| self[name]}
  order
end