Module: Slugable::HasSlug

Defined in:
lib/slugable/has_slug.rb

Instance Method Summary collapse

Instance Method Details

#has_slug(options = {}) ⇒ Object

USAGE generate before save filter for filling slug from name attribute, and parameterize slug attribute you can change default columns by passing :from and :to attributes

it also generate method to_slug (depanding od :to param), which generate slug url for link_path

has_slug # generate to_slug has_slug :from => :title # generate to_slug has_slug :to => :seo_url # generate to_url has_slug :from => :name, :to => :slug # generate to_slug



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# File 'lib/slugable/has_slug.rb', line 15

def has_slug(options={})
  defaults = {:from => :name, :to => :slug, :formatter => :parameterize, :cache_tree => true}
  options.reverse_merge!(defaults)
  from = options.delete(:from)
  to = options.delete(:to)
  formatter = options.delete(:formatter)
  cache_tree = options.delete(:cache_tree)
  before_save :"fill_slug_from_#{from}_to_#{to}", :"format_slug_from_#{from}_to_#{to}"
  after_save :"update_my_#{to}_cache"

  # generate this
  #
  # def fill_slug
  #   self.slug = name if slug.blank? || slug.parameterize.blank?
  # end
  code =<<-method
    def fill_slug_from_#{from}_to_#{to}
      self.#{to} = #{from} if #{to}.blank? || #{to}.parameterize.blank?
    end
  method
  class_eval(code)

  # generate this
  #
  # def format_slug
  #   self.slug = slug.parameterize
  # end
  code =<<-method
    def format_slug_from_#{from}_to_#{to}
      self.#{to} = #{to}.send(:#{formatter})
    end
  method
  class_eval(code)

  # generate this
  # def update_my_slug_cache
  #  @@all ||= {}
  #  @@all[id] = send(:slug)
  # end
  code =<<-method
    def update_my_#{to}_cache
      @@all ||= {}
      @@all[id] = send(:#{to})
    end
  method
  class_eval(code)

  # generate this
  #
  # def self.all_slugs
  #  slug_column = :slug
  #  @@all ||= self.all.map_to_hash{|slug_element| {slug_element.id => slug_element.send(slug_column)}}
  # end
  code =<<-method
    def self.all_#{to}s
      @@all ||= self.all.map_to_hash{|slug_element| {slug_element.id => slug_element.send(:#{to})}}
    end
  method
  class_eval(code)

  # generate this
  #
  # def self.clear_cached_slugs
  #  @@all = nil
  # end
  code =<<-method
    def self.clear_cached_#{to}s
      @@all = nil
    end
  method
  class_eval(code)

  # generate this
  #
  # def self.cached_slug(id)
  #  all_slugs[id]
  # end
  code =<<-method
    def self.cached_#{to}(id)
      all_#{to}s[id].to_s
    end
  method
  class_eval(code)

  # generate this
  #
  # def to_slug
  #  if respond_to?(:path_ids)
  #    slugs = if true
  #      path_ids.map{|id| self.class.cached_slug(id)}.compact.select{|i| i.size > 0 }
  #    else
  #      path.map{|record| record.send(:"slug")}.compact.select{|i| i.size > 0 }
  #    end
  #    slugs.empty? ? "" : slugs
  #  else
  #    send(:slug)
  #  end
  # end
  code =<<-method
    def to_#{to}
      if respond_to?(:path_ids)
        slugs = if #{cache_tree}
          path_ids.map{|id| self.class.cached_#{to}(id)}.compact.select{|i| i.size > 0 }
        else
          path.map{|record| record.send(:"#{to}")}.compact.select{|i| i.size > 0 }
        end
        slugs.empty? ? "" : slugs
      else
        send(:#{to})
      end
    end
  method
  class_eval(code)


  # generate this
  #
  # def to_slug_was
  #  if respond_to?(:ancestry_was)
  #    old_slugs = if true
  #      ancestry_was.to_s.split("/").map { |ancestor_id| self.class.cached_slug(ancestor_id.to_i) }
  #    else
  #      ancestry_was.to_s.split("/").map { |ancestor_id| self.class.find(ancestor_id).send(:slug) }
  #    end
  #    old_slugs << send(:slug_was)
  #  else
  #    send(:slug_was)
  #  end
  # end
  code =<<-method
    def to_#{to}_was
      if respond_to?(:ancestry_was)
        old_slugs = if #{cache_tree}
          ancestry_was.to_s.split("/").map { |ancestor_id| self.class.cached_#{to}(ancestor_id.to_i) }
        else
          ancestry_was.to_s.split("/").map { |ancestor_id| self.class.find(ancestor_id).send(:#{to}) }
        end
        old_slugs << send(:#{to}_was)
      else
        send(:#{to}_was)
      end
    end
  method
  class_eval(code)

  # generate this
  #
  # def to_slug_will
  #  if respond_to?(:ancestry)
  #    old_slugs = if true
  #      ancestry.to_s.split("/").map { |ancestor_id| self.class.cached_slug(ancestor_id.to_i) }
  #    else
  #      ancestry.to_s.split("/").map { |ancestor_id| self.class.find(ancestor_id).send(:slug) }
  #    end
  #    old_slugs << send(:slug)
  #  else
  #    send(:slug_was)
  #  end
  # end
  code =<<-method
      def to_#{to}_will
        if respond_to?(:ancestry)
          new_slugs = if #{cache_tree}
            ancestry.to_s.split("/").map { |ancestor_id| self.class.cached_#{to}(ancestor_id.to_i) }
          else
            ancestry.to_s.split("/").map { |ancestor_id| self.class.find(ancestor_id).send(:#{to}) }
          end
          new_slugs << send(:#{to}).send(:#{formatter})
        else
          send(:#{to}).send(:#{formatter})
        end
      end
  method
  class_eval(code)
end