destroy_associations.diff

diff --git a/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb b/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb
index e40b328..c891178 100644
--- a/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb
+++ b/activerecord/lib/active_record/associations/builder/has_and_belongs_to_many.rb
@@ -19,10 +19,10 @@ module ActiveRecord::Associations::Builder
         name = self.name
         model.send(:include, Module.new {
           class_eval <<-RUBY, __FILE__, __LINE__ + 1
-            def destroy          # def destroy
-              super              #   super
-              #{name}.clear      #   posts.clear
-            end                  # end
+            def destroy_associations # def destroy_associations
+              #{name}.clear          #   posts.clear
+              super                  #   super
+            end                      # end
           RUBY
         })
       end
diff --git a/activerecord/lib/active_record/persistence.rb b/activerecord/lib/active_record/persistence.rb
index 17a64b6..632917a 100644
--- a/activerecord/lib/active_record/persistence.rb
+++ b/activerecord/lib/active_record/persistence.rb
@@ -75,6 +75,8 @@ module ActiveRecord
     # Deletes the record in the database and freezes this instance to reflect
     # that no changes should be made (since they can't be persisted).
     def destroy
+      destroy_associations
+
       if persisted?
         IdentityMap.remove(self) if IdentityMap.enabled?
         self.class.unscoped.where(self.class.arel_table[self.class.primary_key].eq(id)).delete_all
@@ -251,6 +253,11 @@ module ActiveRecord
     end
 
   private
+
+    # A hook to be overriden by association modules.
+    def destroy_associations
+    end
+
     def create_or_update
       raise ReadOnlyRecord if readonly?
       result = new_record? ? create : update