handle `addFollower` duplicates

1 files changed, 7 insertions, 2 deletions

diff --git a/src/main/java/com/juick/service/ActivityPubService.java b/src/main/java/com/juick/service/ActivityPubService.java
index 1bf1b5d4..c45b0c13 100644
--- a/src/main/java/com/juick/service/ActivityPubService.java
+++ b/src/main/java/com/juick/service/ActivityPubService.java
@@ -20,6 +20,7 @@ package com.juick.service;
 import com.juick.model.User;
 import com.juick.model.AnonymousUser;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.dao.DuplicateKeyException;
 import org.springframework.stereotype.Repository;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.util.UriComponents;
@@ -58,8 +59,12 @@ public class ActivityPubService extends BaseJdbcService implements SocialService
     @Transactional
     @Override
     public void addFollower(User user, String acct) {
-        getJdbcTemplate().update("INSERT INTO followers(user_id, acct) " +
-                "VALUES(?, ?)", user.getUid(), acct);
+        try {
+            getJdbcTemplate().update("INSERT INTO followers(user_id, acct) " +
+                    "VALUES(?, ?)", user.getUid(), acct);
+        } catch (DuplicateKeyException e) {
+            // ignore
+        }
     }
 
     @Transactional