Module: ScopedTags::ActiveRecordAdditions

Defined in:
lib/scoped_tags/active_record_additions.rb

Defined Under Namespace

Modules: ClassMethods, InstanceMethods

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/scoped_tags/active_record_additions.rb', line 5

def self.included(base)
  base.class_eval do
    def self.scoped_tags(contexts, options = nil)
      self.class.instance_eval{ attr_accessor :tag_contexts }
      
      raise ScopedTagsError, 'context is required for scoped-tags setup' if contexts.blank?
      
      self.tag_contexts = [contexts].flatten
      
      has_many :taggings, :as => :taggable,       :class_name => 'Tagging', :dependent => :delete_all
      has_many :tags,     :through => :taggings,  :class_name => 'Tag',     :readonly => true
        
      self.tag_contexts.each do |context|
        has_many context, :through => :taggings, :class_name => 'Tag',
                          :source  => :tag,
                          :conditions => ['context = ?', context.to_s.downcase]
        
        c = context.to_s.singularize
        define_method("#{c}_list")   { get_tag_list(context) }
        define_method("#{c}_list=")  { |new_list| set_tag_list(context, new_list) }
        self.class.instance_eval do
          define_method("tagged_with_#{context}") { |*args| find_tagged_with(args.first, context.to_s, args.extract_options!) }
        end
      end          
      
      self.send :extend,  ClassMethods
      self.send :include, InstanceMethods
    end
  end
end