Module: StateMachine

Defined in:
app/models/concerns/state_machine.rb

Instance Method Summary collapse

Instance Method Details

#next_state(state_name, &block) ⇒ Object 



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# File 'app/models/concerns/state_machine.rb', line 52

def next_state(state_name, &block)
  next_states(state_name, &block).first
end

#next_states(state_name, &block) ⇒ Object

obj.next_states(:state) do |result|

result.reject

end



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# File 'app/models/concerns/state_machine.rb', line 59

def next_states(state_name, &block)
  _states = self.class.send(state_name.to_s.pluralize)
  _states = _states.keys
  _state = self.send(state_name)

  if _state.nil?
    next_index = 0
  else
    i = _states.index(_state)
    next_index = i + 1
  end
  result = _states[next_index..(_states.size - 1)]

  if block_given?
    yield block.call(result)
  else
    result
  end
end

#next_to(options = {}, &block) ⇒ Object

obj.next_to state: ‘xxx’



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# File 'app/models/concerns/state_machine.rb', line 6

def next_to(options = {}, &block)
  options.each do |column, value|
    if self.class.method_defined? "next_#{column}_states"
      _next_state = self.send("next_#{column}_states").first
    else
      _next_state = next_state(column, &block)
    end

    if _next_state == value.to_s
      assign_attributes(column => value)
    else
      error_msg = "Next state is wrong, should be #{_next_state}"
      errors.add column, error_msg
      raise ActiveRecord::Rollback, error_msg
    end
  end
end

#next_to!(options = {}, &block) ⇒ Object 



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# File 'app/models/concerns/state_machine.rb', line 24

def next_to!(options = {}, &block)
  self.next_to(options, &block)
  self.save!
end

#trigger_to(options = {}, &block) ⇒ Object 



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# File 'app/models/concerns/state_machine.rb', line 29

def trigger_to(options = {}, &block)
  options.each do |column, value|
    if self.class.method_defined? "next_#{column}_states"
      _next_states = self.send "next_#{column}_states"
    else
      _next_states = next_states(column, &block)
    end

    if _next_states.include?(value.to_s)
      assign_attributes(column => value)
    else
      error_msg = "Next state is wrong, should be one of #{_next_states.join(', ')}"
      errors.add column, error_msg
      raise ActiveRecord::Rollback, error_msg
    end
  end
end

#trigger_to!(options = {}, &block) ⇒ Object 



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# File 'app/models/concerns/state_machine.rb', line 47

def trigger_to!(options = {}, &block)
  self.trigger_to(options, &block)
  self.save!
end