Avoid obtaining mapped sort multiple times for mapReduce.

blu10ph · christophstrobl · commit 67b1fe5fbcc5 · 2022-02-16T14:42:57.000+01:00
Apply already mapped sort for map reduce instead of running the source document through the mapping layer again. Closes: #3960
diff --git a/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoTemplate.java b/spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/MongoTemplate.java
@@ -1687,7 +1687,7 @@ public <T> List<T> mapReduce(Query query, Class<?> domainType, String inputColle
 
 		Document mappedSort = getMappedSortObject(query, domainType);
 		if (mappedSort != null && !mappedSort.isEmpty()) {
-			mapReduce = mapReduce.sort(getMappedSortObject(query, domainType));
+			mapReduce = mapReduce.sort(mappedSort);
 		}
 
 		mapReduce = mapReduce

Original file line number	Diff line number	Diff line change
`@@ -1687,7 +1687,7 @@ public <T> List<T> mapReduce(Query query, Class<?> domainType, String inputColle`
`1687`	`1687`
`1688`	`1688`	`Document mappedSort = getMappedSortObject(query, domainType);`
`1689`	`1689`	`if (mappedSort != null && !mappedSort.isEmpty()) {`
`1690`		`- mapReduce = mapReduce.sort(getMappedSortObject(query, domainType));`
	`1690`	`+ mapReduce = mapReduce.sort(mappedSort);`
`1691`	`1691`	`}`
`1692`	`1692`
`1693`	`1693`	`mapReduce = mapReduce`