base.rb in permalink-1.2.0

- old
+ new

@@ -3,19 +3,21 @@
     module Base
       module ClassMethods
         def setup_permalink(orm_options, from, options)
           options.reverse_merge!(orm_options)
           options.reverse_merge!({
-            :to       => :permalink,
-            :unique   => false
+            :to     => :permalink,
+            :unique => false,
+            :force  => false
           })
 
           self.permalink_options = {
             :from_column_name => from,
             :to_column_name   => options[:to],
             :to_param         => [options[:to_param]].flatten,
-            :unique           => options[:unique]
+            :unique           => options[:unique],
+            :force            => options[:force]
           }
 
           before_validation :create_permalink
           before_save :create_permalink
         end
@@ -64,11 +66,15 @@
 
         def to_permalink_value
           read_attribute(to_permalink_name)
         end
 
+        def update_permalink?
+          self.class.permalink_options[:force] || to_permalink_value.blank?
+        end
+
         def create_permalink
-          unless from_permalink_value.blank? || !to_permalink_value.blank?
+          if update_permalink?
             write_attribute(to_permalink_name, next_available_permalink(from_permalink_value.to_s.to_permalink))
           end
         end
       end
     end