module DataMapper::Model::Is

Module that provides a common way for plugin authors to implement “is … ” traits (object behaviors that can be shared)

Public Instance Methods

is(plugin, *args, &block) click to toggle source

A common interface to activate plugins for a resource. For instance:

class Widget

include DataMapper::Resource

is :list

end

adds list item behavior to the model. Plugin that wants to conform to “is API” of DataMapper must supply is_+behavior name+ method, for example above it would be is_list.

@api public

# File lib/dm-core/model/is.rb, line 19
def is(plugin, *args, &block)
  generator_method = "is_#{plugin}".to_sym

  if respond_to?(generator_method)
    send(generator_method, *args, &block)
  else
    raise PluginNotFoundError, "could not find plugin named #{plugin}"
  end
end