Avoid obtaining mapped sort multiple times for mapReduce.

blu10ph · christophstrobl · commit d4dc13894aa4 · 2022-02-11T10:44:44.000+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
@@ -1852,7 +1852,7 @@ 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
`@@ -1852,7 +1852,7 @@ public <T> List<T> mapReduce(Query query, Class<?> domainType, String inputColle`
`1852`	`1852`
`1853`	`1853`	`Document mappedSort = getMappedSortObject(query, domainType);`
`1854`	`1854`	`if (mappedSort != null && !mappedSort.isEmpty()) {`
`1855`		`- mapReduce = mapReduce.sort(getMappedSortObject(query, domainType));`
	`1855`	`+ mapReduce = mapReduce.sort(mappedSort);`
`1856`	`1856`	`}`
`1857`	`1857`
`1858`	`1858`	`mapReduce = mapReduce`