fix(NODE-5628): bulkWriteResult.insertedIds does not filter out _ids that are not actually inserted

src/bulk/common.ts

@@ -197,15 +197,17 @@ export class BulkWriteResult {
    * Create a new BulkWriteResult instance
    * @internal
    */
-  constructor(bulkResult: BulkResult) {
+  constructor(bulkResult: BulkResult, isOrdered: boolean) {
     this.result = bulkResult;
     this.insertedCount = this.result.nInserted ?? 0;
     this.matchedCount = this.result.nMatched ?? 0;
     this.modifiedCount = this.result.nModified ?? 0;
     this.deletedCount = this.result.nRemoved ?? 0;
     this.upsertedCount = this.result.upserted.length ?? 0;
     this.upsertedIds = BulkWriteResult.generateIdMap(this.result.upserted);
-    this.insertedIds = BulkWriteResult.generateIdMap(this.result.insertedIds);
+    this.insertedIds = BulkWriteResult.generateIdMap(
+      this.getSuccessfullyInsertedIds(bulkResult, isOrdered)
+    );
     Object.defineProperty(this, 'result', { value: this.result, enumerable: false });
   }
 
@@ -214,6 +216,22 @@ export class BulkWriteResult {
     return this.result.ok;
   }
 
+  /**
+   * Returns document_ids that were actually inserted
+   * @internal
+   */
+  private getSuccessfullyInsertedIds(bulkResult: BulkResult, isOrdered: boolean): Document[] {
+    if (bulkResult.writeErrors.length === 0) return bulkResult.insertedIds;
+
+    if (isOrdered) {
+      return bulkResult.insertedIds.slice(0, bulkResult.writeErrors[0].index);
+    }
+
+    return bulkResult.insertedIds.filter(
+      ({ index }) => !bulkResult.writeErrors.some(writeError => index === writeError.index)
+    );
+  }
+
   /** Returns the upserted id at the given index */
   getUpsertedIdAt(index: number): Document | undefined {
     return this.result.upserted[index];
@@ -479,7 +497,10 @@ function executeCommands(
   callback: Callback<BulkWriteResult>
 ) {
   if (bulkOperation.s.batches.length === 0) {
-    return callback(undefined, new BulkWriteResult(bulkOperation.s.bulkResult));
+    return callback(
+      undefined,
+      new BulkWriteResult(bulkOperation.s.bulkResult, bulkOperation.isOrdered)
+    );
   }
 
   const batch = bulkOperation.s.batches.shift() as Batch;
@@ -488,17 +509,26 @@ function executeCommands(
     // Error is a driver related error not a bulk op error, return early
     if (err && 'message' in err && !(err instanceof MongoWriteConcernError)) {
       return callback(
-        new MongoBulkWriteError(err, new BulkWriteResult(bulkOperation.s.bulkResult))
+        new MongoBulkWriteError(
+          err,
+          new BulkWriteResult(bulkOperation.s.bulkResult, bulkOperation.isOrdered)
+        )
       );
     }
 
     if (err instanceof MongoWriteConcernError) {
-      return handleMongoWriteConcernError(batch, bulkOperation.s.bulkResult, err, callback);
+      return handleMongoWriteConcernError(
+        batch,
+        bulkOperation.s.bulkResult,
+        bulkOperation.isOrdered,
+        err,
+        callback
+      );
     }
 
     // Merge the results together
     mergeBatchResults(batch, bulkOperation.s.bulkResult, err, result);
-    const writeResult = new BulkWriteResult(bulkOperation.s.bulkResult);
+    const writeResult = new BulkWriteResult(bulkOperation.s.bulkResult, bulkOperation.isOrdered);
     if (bulkOperation.handleWriteError(callback, writeResult)) return;
 
     // Execute the next command in line
@@ -572,6 +602,7 @@ function executeCommands(
 function handleMongoWriteConcernError(
   batch: Batch,
   bulkResult: BulkResult,
+  isOrdered: boolean,
   err: MongoWriteConcernError,
   callback: Callback<BulkWriteResult>
 ) {
@@ -583,7 +614,7 @@ function handleMongoWriteConcernError(
         message: err.result?.writeConcernError.errmsg,
         code: err.result?.writeConcernError.result
       },
-      new BulkWriteResult(bulkResult)
+      new BulkWriteResult(bulkResult, isOrdered)
     )
   );
 }

test/integration/crud/bulk.test.ts

@@ -5,6 +5,7 @@ import {
   type Collection,
   Long,
   MongoBatchReExecutionError,
+  MongoBulkWriteError,
   type MongoClient,
   MongoDriverError,
   MongoInvalidArgumentError
@@ -31,7 +32,6 @@ describe('Bulk', function () {
       .createCollection('test')
       .catch(() => null); // make ns exist
   });
-
   afterEach(async function () {
     const cleanup = this.configuration.newClient();
     await cleanup
@@ -91,6 +91,7 @@ describe('Bulk', function () {
           }
         });
       });
+
       context('when passed a valid document list', function () {
         it('insertMany should not throw a MongoInvalidArgument error when called with a valid operation', async function () {
           try {
@@ -104,6 +105,121 @@ describe('Bulk', function () {
           }
         });
       });
+
+      context('when inserting duplicate values', function () {
+        let col;
+
+        beforeEach(async function () {
+          const db = client.db();
+          col = db.collection('test');
+          await col.createIndex([{ a: 1 }], { unique: true, sparse: false });
+        });
+
+        async function assertFailsWithDuplicateFields(input, isOrdered, expectedInsertedIds) {
+          const error = await col.insertMany(input, { ordered: isOrdered }).catch(error => error);
+          expect(error).to.be.instanceOf(MongoBulkWriteError);
+          expect(error.result.insertedCount).to.equal(Object.keys(error.result.insertedIds).length);
+          expect(error.result.insertedIds).to.deep.equal(expectedInsertedIds);
+        }
+
+        context('when the insert is ordered', function () {
+          it('contains the correct insertedIds on one duplicate insert', async function () {
+            await assertFailsWithDuplicateFields(
+              [
+                { _id: 0, a: 1 },
+                { _id: 1, a: 1 }
+              ],
+              true,
+              { 0: 0 }
+            );
+          });
+
+          it('contains the correct insertedIds on multiple duplicate inserts', async function () {
+            await assertFailsWithDuplicateFields(
+              [
+                { _id: 0, a: 1 },
+                { _id: 1, a: 1 },
+                { _id: 2, a: 1 },
+                { _id: 3, b: 2 }
+              ],
+              true,
+              { 0: 0 }
+            );
+          });
+        });
+
+        context('when the insert is unordered', function () {
+          it('contains the correct insertedIds on multiple duplicate inserts', async function () {
+            await assertFailsWithDuplicateFields(
+              [
+                { _id: 0, a: 1 },
+                { _id: 1, a: 1 },
+                { _id: 2, a: 1 },
+                { _id: 3, b: 2 }
+              ],
+              false,
+              { 0: 0, 3: 3 }
+            );
+          });
+        });
+      });
+    });
+
+    describe('#bulkWrite()', function () {
+      context('when inserting duplicate values', function () {
+        let col;
+
+        beforeEach(async function () {
+          const db = client.db();
+          col = db.collection('test');
+          await col.createIndex([{ a: 1 }], { unique: true, sparse: false });
+        });
+
+        async function assertFailsWithDuplicateFields(input, isOrdered, expectedInsertedIds) {
+          const error = await col.bulkWrite(input, { ordered: isOrdered }).catch(error => error);
+          expect(error).to.be.instanceOf(MongoBulkWriteError);
+          expect(error.result.insertedCount).to.equal(Object.keys(error.result.insertedIds).length);
+          expect(error.result.insertedIds).to.deep.equal(expectedInsertedIds);
+        }
+
+        context('when the insert is ordered', function () {
+          it('contains the correct insertedIds on one duplicate insert', async function () {
+            await assertFailsWithDuplicateFields(
+              [{ insertOne: { _id: 0, a: 1 } }, { insertOne: { _id: 1, a: 1 } }],
+              true,
+              { 0: 0 }
+            );
+          });
+
+          it('contains the correct insertedIds on multiple duplicate inserts', async function () {
+            await assertFailsWithDuplicateFields(
+              [
+                { insertOne: { _id: 0, a: 1 } },
+                { insertOne: { _id: 1, a: 1 } },
+                { insertOne: { _id: 2, a: 1 } },
+                { insertOne: { _id: 3, b: 2 } }
+              ],
+              true,
+              { 0: 0 }
+            );
+          });
+        });
+
+        context('when the insert is unordered', function () {
+          it('contains the correct insertedIds on multiple duplicate inserts', async function () {
+            await assertFailsWithDuplicateFields(
+              [
+                { insertOne: { _id: 0, a: 1 } },
+                { insertOne: { _id: 1, a: 1 } },
+                { insertOne: { _id: 2, a: 1 } },
+                { insertOne: { _id: 3, b: 2 } }
+              ],
+              false,
+              { 0: 0, 3: 3 }
+            );
+          });
+        });
+      });
     });
   });