fix(txns): omit writeConcern when in a transaction

mongodb · Apr 18, 2018 · b88c938 · b88c938
1 parent 5c2d12c
commit b88c938
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/lib/utils.js b/lib/utils.js
@@ -455,6 +455,15 @@ function applyWriteConcern(target, sources, options) {
   const db = sources.db;
   const coll = sources.collection;
 
+  if (options.session && options.session.inTransaction()) {
+    // writeConcern is not allowed within a multi-statement transaction
+    if (target.writeConcern) {
+      delete target.writeConcern;
+    }
+
+    return target;
+  }
+
   // NOTE: there is probably a much better place for this
   if (db && db.s.options.retryWrites) {
     target.retryWrites = true;