From 7d8803c352b915d7a03ada3f9e5be6d5ca829e83 Mon Sep 17 00:00:00 2001
From: Ray Lee <ray.lee@lyrasis.org>
Date: Sun, 22 Mar 2020 20:59:54 -0400
Subject: [PATCH] DRYD-846: Error when attempting to merge an authority item
 into itself.

---
 .../services/batch/nuxeo/MergeAuthorityItemsBatchJob.java | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/services/batch/service/src/main/java/org/collectionspace/services/batch/nuxeo/MergeAuthorityItemsBatchJob.java b/services/batch/service/src/main/java/org/collectionspace/services/batch/nuxeo/MergeAuthorityItemsBatchJob.java
index 9778e13b7..b0c01bbde 100644
--- a/services/batch/service/src/main/java/org/collectionspace/services/batch/nuxeo/MergeAuthorityItemsBatchJob.java
+++ b/services/batch/service/src/main/java/org/collectionspace/services/batch/nuxeo/MergeAuthorityItemsBatchJob.java
@@ -142,6 +142,14 @@ public class MergeAuthorityItemsBatchJob extends AbstractBatchJob {
 			? findAuthorityItemByRefName(serviceName, target)
 			: findAuthorityItemByCsid(serviceName, target);
 
+		String targetItemCsid = getCsid(targetItemPayload);
+
+		for (String sourceCsid : sourceCsids) {
+			if (sourceCsid.equals(targetItemCsid)) {
+				throw new DocumentException("Can't merge a record into itself.");
+			}
+		}
+
 		List<PoxPayloadOut> sourceItemPayloads = new ArrayList<PoxPayloadOut>();
 
 		for (String sourceCsid : sourceCsids) {
-- 
2.47.3