diff --git a/src/database/lib/IndexUtil.ts b/src/database/lib/IndexUtil.ts
index b34205e..7b8aeb0 100644
--- a/src/database/lib/IndexUtil.ts
+++ b/src/database/lib/IndexUtil.ts
@@ -148,20 +148,20 @@ class IndexUtil {
   }
 
   getParents(type: BrainAtlasType, parentId: number, func: SearchCallbackFunc): void {
-    const parents: Index[] = [];
-    const loop = (parentId: number, func: SearchCallbackFunc) => {
-      if (parentId === INDEX_ID_ROOT) {
-        func(parents);
-      } else {
-        this.get(type, parentId, (parent) => {
-          if (parent != null) {
-            loop(parent.parentId, func);
+    this.registerIndexLoadCallback(type, (indexes) => {
+      const parents: Index[] = [];
+      const loop = (parentId: number) => {
+        if (parentId !== INDEX_ID_ROOT) {
+          const parent = indexes.findOne({ id: parentId });
+          if (parent !== null) {
+            loop(parent.parentId);
             parents.push(parent);
           }
-        });
-      }
-    };
-    loop(parentId, func);
+        }
+      };
+      loop(parentId);
+      func(parents);
+    });
   }
 }