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Versions: 31
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Contents
module StateMachine
module Transition
def self.included(klass)
klass.extend ActiveModel::Naming
klass.extend ClassMethods
klass.class_attribute :action_name, :target_state
end
attr_accessor :errors, :object
delegate :action_name, :target_state, :valid_from_states, :status_field, to: :class
module ClassMethods
def status_field=(field_name)
@status_field = field_name
end
def status_field
return @status_field if @status_field
return 'status' if self.transitioning_class.column_names.include? 'status'
return 'state' if self.transitioning_class.column_names.include? 'state'
end
def valid_from_states=(array)
if array.first.respond_to? :to_sym
@valid_from_states = array.map(&:to_sym)
else
@valid_from_states = array
end
end
def valid_from_states
@valid_from_states
end
def transitioning_class
self.name.deconstantize.constantize
end
end
def current_state
current_state = self.object.send status_field
current_state = current_state.to_sym if current_state.respond_to? :to_sym
current_state
end
def validate_transition
if self.valid_from_states.exclude? self.current_state
self.errors.add(:base, "You can't transition from #{self.current_state} to #{self.target_state}")
self.object.errors.add(:base, "You can't transition from #{self.current_state} to #{self.target_state}")
end
end
def validate_transition!
if self.valid_from_states.exclude? self.current_state
raise "You can't transition from #{self.current_state} to #{self.target_state} for #{self.object.class.name} #{self.object.id}"
end
end
def update_status
self.object.update status_field => self.target_state
end
end
end
Version data entries
31 entries across 31 versions & 1 rubygems