Add factory capability to a class.

A factory is able to define which field it want to generate content for, define a scope for different situation, and set a custom content generator for field that doesn‘t want to use the default content generator.

You must add this module when creating a factory class; and the name of the factory class should be following this format:

  #{model_name_camelcase}Factory

Example:

  If there's a model class named "Item", then its factory must be:

  class ItemFactory
    include Mack::Data::Factory
    ...
  end

See Mack::Data::Factory::ClassMethods for the factory API and examples.