1 files changed, 9 insertions, 0 deletions
diff --git a/src/mongo/db/keypattern.h b/src/mongo/db/keypattern.h
index 986d259eebd..034bfb5833d 100644
--- a/src/mongo/db/keypattern.h
+++ b/src/mongo/db/keypattern.h
@@ -33,6 +33,7 @@
 #include "mongo/base/string_data.h"
 #include "mongo/bson/util/builder.h"
 #include "mongo/db/jsobj.h"
+#include "mongo/db/query/query_shape/serialization_options.h"
 #include "mongo/util/str.h"
 
 namespace mongo {
@@ -84,6 +85,14 @@ public:
         return _pattern;
     }
 
+    BSONObj serializeForIDL(const SerializationOptions& options = {}) const {
+        BSONObjBuilder bob;
+        for (const auto& e : _pattern) {
+            bob.appendAs(e, options.serializeIdentifier(e.fieldNameStringData()));
+        }
+        return bob.obj();
+    }
+
     /**
      * Returns a string representation of this KeyPattern.
      */