After seeing repetition in my models involving ‘states’, I attempted to create a concern only to have problems being able to dynamically create virtual attributes with the models name.
Suppose I wanted to refactor the following tings inside a model to a concern:
class Project < ActiveRecord::Base
attr_accessor :approve_project, :unapprove_project
#special actions
before_save :perform_state_change
# State Machine
state_machine :state, initial: :pending do
state :coming_soon
event :approve do
transition any => :approved
end
event :not_approved do
transition any => :pending
end
end
def perform_state_change
self.state = 'approved' if approve_project == '1'
self.state = 'pending' if unapprove_project == '1'
end
end
I attempted the following with no luck
module WorkStates
extend ActiveSupport::Concern
included do
# also tried .constantize with no luck; would try __send__ or self.send(:attr_accessor, ) if I understood what would have to be passed in here
attr_accessor "approve_#{self.to_s.downcase}".to_sym, "unapprove_#{self.to_s.downcase}".to_sym
state_machine :state, initial: :pending do
state :coming_soon
event :approve do
transition any => :approved
end
event :not_approved do
transition any => :pending
end
end
end
def perform_state_change
self.state = 'approved' if "approve_#{self.class.to_s.downcase}".constantize == 1
self.state = 'pending' if "unapprove_#{self.class.to_s.downcase}".constantize == 1
end
end
When attempting to do the following I get invalid variable ':approve_project' errors.
Any idea on what I would have to refactor to get this concern to properlly work?