lib/has_meta.rb in has_meta-0.0.2 vs lib/has_meta.rb in has_meta-0.0.3

@@ -12,12 +12,18 @@
       def has_meta(options = {})
         options.each_pair do |meth, fields|
           define_method("meta_#{meth}") {|*args|
             length = args.first if args.is_a? Array
             length ||= 255
-            field = [*fields].detect{|f| send(f).present?}
-            return nil if field.nil?
-            str = send(field).to_s.strip
+
+            if fields.is_a? Proc
+              str = fields.call(self)
+            else
+              field = [*fields].detect{|f| send(f).present?}
+              return nil if field.nil?
+              str = send(field).to_s.strip
+            end
+
             str.gsub!(' ', ' ')
             str.gsub!(/<.*?>/, '')
             str = ::CGI::unescapeHTML(str)
             str = (str[0,length - 3] + '...') if str.size > length
             str