From 4972447926f6384b34cb395deed744d6d1332a42 Mon Sep 17 00:00:00 2001
From: schroda <50052685+schroda@users.noreply.github.com>
Date: Wed, 1 Nov 2023 12:54:41 +0100
Subject: [PATCH] Only batch update in case list is not empty

Apparently "BatchUpdateStatement" can't handle an empty data set
---
 .../suwayomi/tachidesk/manga/impl/Chapter.kt  | 24 ++++++++++---------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Chapter.kt b/server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Chapter.kt
index ffc5cbc4ec..8a19d84330 100644
--- a/server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Chapter.kt
+++ b/server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Chapter.kt
@@ -175,18 +175,20 @@ object Chapter {
                 }
             }
 
-            BatchUpdateStatement(ChapterTable).apply {
-                chaptersToUpdate.forEach {
-                    addBatch(EntityID(it.id, ChapterTable))
-                    this[ChapterTable.name] = it.name
-                    this[ChapterTable.date_upload] = it.uploadDate
-                    this[ChapterTable.chapter_number] = it.chapterNumber
-                    this[ChapterTable.scanlator] = it.scanlator
-                    this[ChapterTable.sourceOrder] = it.index
-                    this[ChapterTable.fetchedAt] = it.fetchedAt
-                    this[ChapterTable.realUrl] = it.realUrl
+            if (chaptersToUpdate.isNotEmpty()) {
+                BatchUpdateStatement(ChapterTable).apply {
+                    chaptersToUpdate.forEach {
+                        addBatch(EntityID(it.id, ChapterTable))
+                        this[ChapterTable.name] = it.name
+                        this[ChapterTable.date_upload] = it.uploadDate
+                        this[ChapterTable.chapter_number] = it.chapterNumber
+                        this[ChapterTable.scanlator] = it.scanlator
+                        this[ChapterTable.sourceOrder] = it.index
+                        this[ChapterTable.fetchedAt] = it.fetchedAt
+                        this[ChapterTable.realUrl] = it.realUrl
+                    }
+                    execute(this@transaction)
                 }
-                execute(this@transaction)
             }
 
             MangaTable.update({ MangaTable.id eq mangaId }) {