Merge pull request #61 from herval/master

quick fix: conditional indexing now removes stales from index too

lib/tanker.rb

@@ -392,10 +392,15 @@ def tanker_conditions
     end
 
     # update a create instance from index tank
+    # or remove it if not indexable anymore
     def update_tank_indexes
-      tanker_config.index.add_document(
-        it_doc_id, tanker_index_data, tanker_index_options
-      ) if tanker_indexable?
+      if tanker_indexable?
+        tanker_config.index.add_document(
+          it_doc_id, tanker_index_data, tanker_index_options
+        )
+      else
+        delete_tank_indexes
+      end
     end
 
     # delete instance from index tank

spec/tanker_spec.rb

@@ -216,6 +216,17 @@ def index_or_not?
         end
       end
 
+      it "should remove object from index if conditions are not met" do
+        @dummy_class.send(:tankit, 'dummy index') do
+          indexes :something
+          conditions { false }
+        end
+        dummy_instance = @dummy_class.new
+        dummy_instance.should_receive(:delete_tank_indexes).once
+
+        dummy_instance.update_tank_indexes
+      end
+
       it 'should be indexable when no conditions are given' do
         @dummy_class.send(:tankit, 'dummy index') do
           indexes :something