def clear_association_cache
      self.class.associations[:has_many].each do |assoc|
        instance_variable_set(:"@_her_association_#{assoc[:name]}", nil)
        attributes.delete(assoc[:name].to_s)
      end
    end
def clear_association_cache
      self.class.associations[:has_many].each do |assoc|
        instance_variable_set(:"@_her_association_#{assoc[:name]}", nil)
        attributes.delete(assoc[:name].to_s)
      end
    end
Clear the record association cache