Module: ActiveRecord::Acts::Statused::ClassMethods

Defined in:
lib/acts_as_statused.rb

Instance Method Summary collapse

Instance Method Details

#acts_as_statused(options = {}, &extension) ⇒ Object 



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# File 'lib/acts_as_statused.rb', line 10

def acts_as_statused(options = {}, &extension)
  begin
    # don't allow multiple calls
    return if self.included_modules.include?(ActiveRecord::Acts::Statused::ActMethods)

    send :include, ActiveRecord::Acts::Statused::ActMethods
  
    valid_status = []
    valid_statuses = options[:only] if options.is_a?(Hash)
  
    class_name = options.to_s if options.is_a?(Symbol) || options.is_a?(String)
    class_name = options[:class_name] if options.is_a?(Hash)
    class_name = "Status" if class_name.blank?
    
    column_name = :status_id
    column_name = (options[:column_name] || :status_id).to_sym if options.is_a?(Hash)
  
    #puts "!!!!!!!!!!!class_name = #{class_name}"
  
    class_eval do
      eval("belongs_to :status, :class_name => \"#{class_name}\"")
    
      attr_accessor :previous_status
    
      eval %{
        def after_find
          self.previous_status = self.status if respond_to?(:#{column_name})
        end
        
        def status
          #{class_name}.get(self.#{column_name})
        end
      }
    
      def has_status_changed?
        return self.previous_status != self.status
      end

      begin
        rows = eval "#{class_name}.find(:all)"
        rows.each do |status| #get all the statuses in the db.
          # only define valid statuses
          # EX: acts_as_statused :only => ['active', 'inactive', 'pending']
          next unless valid_statuses.blank? || valid_statuses.include?(status.name)

          define_method("status_is_#{status.name}?") do #define the method status_is_statusname?
            return self.status_id == status.id
          end                           
        end
      rescue
      end
    
    end
  
    %w{save update create destroy}.each do |verb|
      define_method("before_#{verb}_status_changed") do
        #puts "before_#{verb}_status_changed"
      end
    
      define_method("after_#{verb}_status_changed") do
        #puts "after_#{verb}_status_changed"
      end
    
      define_method("do_before_#{verb}_status_changed") do
        eval %{before_#{verb}_status_changed if self.has_status_changed?}
      end
    
      define_method("do_after_#{verb}_status_changed") do
        eval %{after_#{verb}_status_changed if self.has_status_changed?}
      end
    
      eval %{
        before_#{verb} :do_before_#{verb}_status_changed
        after_#{verb} :do_after_#{verb}_status_changed
      }
    end
  rescue => ex
    #puts "Error in acts_as_statused: #{ex.message}"
    #puts ex.backtrace
  end
end