#42 - Polishing.

Obtain generated ID value only once.

Author: mp911de

Diff for: src/main/java/org/springframework/data/r2dbc/convert/MappingR2dbcConverter.java

@@ -580,9 +580,7 @@ private boolean potentiallySetId(Row row, RowMetadata metadata, PersistentProper
 
 		if (columns.contains(idColumnName)) {
 			generatedIdValue = row.get(idColumnName);
-		}
-
-		if (columns.size() == 1) {
+		} else if (columns.size() == 1) {
 
 			String key = columns.iterator().next();
 			generatedIdValue = row.get(key);