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Pre-load meta entries for all chapters for optimization (#432)

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Load meta entries for all chapters in one query to prevent N+1 queries
This commit is contained in:
Valter Martinek
2022-10-30 17:48:27 +01:00
committed by GitHub
parent 0fa2834d25
commit a9e5bc0c95
1 changed files with 13 additions and 1 deletions
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14
server/src/main/kotlin/suwayomi/tachidesk/manga/impl/Chapter.kt
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@@ -132,6 +132,9 @@ object Chapter {
.associateBy({ it[ChapterTable.url] }, { it }) .associateBy({ it[ChapterTable.url] }, { it })
} }
val chapterIds = chapterList.map { dbChapterMap.getValue(it.url)[ChapterTable.id] }
val chapterMetas = getChaptersMetaMaps(chapterIds)
return chapterList.mapIndexed { index, it -> return chapterList.mapIndexed { index, it ->
val dbChapter = dbChapterMap.getValue(it.url) val dbChapter = dbChapterMap.getValue(it.url)
@@ -156,7 +159,7 @@ object Chapter {
dbChapter[ChapterTable.pageCount], dbChapter[ChapterTable.pageCount],
chapterList.size, chapterList.size,
meta = getChapterMetaMap(dbChapter[ChapterTable.id]) meta = chapterMetas.getValue(dbChapter[ChapterTable.id])
) )
} }
} }
@@ -193,6 +196,15 @@ object Chapter {
} }
} }
fun getChaptersMetaMaps(chapterIds: List<EntityID<Int>>): Map<EntityID<Int>, Map<String, String>> {
return transaction {
ChapterMetaTable.select { ChapterMetaTable.ref inList chapterIds }
.groupBy { it[ChapterMetaTable.ref] }
.mapValues { it.value.associate { it[ChapterMetaTable.key] to it[ChapterMetaTable.value] } }
.withDefault { emptyMap<String, String>() }
}
}
fun getChapterMetaMap(chapter: EntityID<Int>): Map<String, String> { fun getChapterMetaMap(chapter: EntityID<Int>): Map<String, String> {
return transaction { return transaction {
ChapterMetaTable.select { ChapterMetaTable.ref eq chapter } ChapterMetaTable.select { ChapterMetaTable.ref eq chapter }