From 17c31b7e2874fb1b425ffcbd4ab7d665608d1eb8 Mon Sep 17 00:00:00 2001
From: Valeri Karpov <val@karpov.io>
Date: Tue, 22 Aug 2023 18:00:54 -0400
Subject: [PATCH] fix(model): make Model.bulkWrite() with empty array and
 ordered false not throw an error

Fix #13664
---
 lib/model.js       |  4 ++++
 test/model.test.js | 29 ++++++++++++++++++++++++++---
 2 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/lib/model.js b/lib/model.js
index f304618a7ef..c5e54c46f67 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -3796,6 +3796,10 @@ Model.bulkWrite = function(ops, options, callback) {
     function completeUnorderedValidation() {
       validOps = validOps.sort().map(index => ops[index]);
 
+      if (validOps.length === 0) {
+        return cb(null, getDefaultBulkwriteResult());
+      }
+
       this.$__collection.bulkWrite(validOps, options, (error, res) => {
         if (error) {
           if (validationErrors.length > 0) {
diff --git a/test/model.test.js b/test/model.test.js
index b9b0ff0f3f6..4cf5198eb83 100644
--- a/test/model.test.js
+++ b/test/model.test.js
@@ -7856,9 +7856,32 @@ describe('Model', function() {
     const userSchema = new Schema({ name: String });
     const User = db.model('User', userSchema);
 
-    const err = await User.bulkWrite([], { ordered: false }).then(() => null, err => err);
-    assert.ok(err);
-    assert.equal(err.name, 'MongoInvalidArgumentError');
+    const res = await User.bulkWrite([], { ordered: false });
+    assert.deepEqual(
+      res,
+      {
+        result: {
+          ok: 1,
+          writeErrors: [],
+          writeConcernErrors: [],
+          insertedIds: [],
+          nInserted: 0,
+          nUpserted: 0,
+          nMatched: 0,
+          nModified: 0,
+          nRemoved: 0,
+          upserted: []
+        },
+        insertedCount: 0,
+        matchedCount: 0,
+        modifiedCount: 0,
+        deletedCount: 0,
+        upsertedCount: 0,
+        upsertedIds: {},
+        insertedIds: {},
+        n: 0
+      }
+    );
   });
 
   it('allows calling `create()` after `bulkWrite()` (gh-9350)', async function() {