diff --git a/src/main/java/database/Database2.java b/src/main/java/database/Database2.java
index 8ea93b0..5152e47 100644
--- a/src/main/java/database/Database2.java
+++ b/src/main/java/database/Database2.java
@@ -128,6 +128,11 @@
     }
 
     @Override
+    public Seed[] GetSeedListByTag(String tag) {
+        return new Seed[0];
+    }
+
+    @Override
     public boolean AddCollect(String userid, String postid) {
         return false;
     }