fix: make _id optional in replacement for replaceOne operations

The _id field is immutable in a replaceOne operation, so it does not
make sense to require passing it. Also, this makes replaceOne consistent
with insertOne.

src/bulk/common.ts

@@ -79,7 +79,7 @@ export interface ReplaceOneModel<TSchema extends Document = Document> {
   /** The filter to limit the replaced document. */
   filter: Filter<TSchema>;
   /** The document with which to replace the matched document. */
-  replacement: TSchema;
+  replacement: OptionalId<TSchema>;
   /** Specifies a collation. */
   collation?: CollationOptions;
   /** The index to use. If specified, then the query system will only consider plans using the hinted index. */

src/collection.ts

@@ -459,26 +459,29 @@ export class Collection<TSchema extends Document = Document> {
    * @param options - Optional settings for the command
    * @param callback - An optional callback, a Promise will be returned if none is provided
    */
-  replaceOne(filter: Filter<TSchema>, replacement: TSchema): Promise<UpdateResult | Document>;
   replaceOne(
     filter: Filter<TSchema>,
-    replacement: TSchema,
+    replacement: OptionalId<TSchema>
+  ): Promise<UpdateResult | Document>;
+  replaceOne(
+    filter: Filter<TSchema>,
+    replacement: OptionalId<TSchema>,
     callback: Callback<UpdateResult | Document>
   ): void;
   replaceOne(
     filter: Filter<TSchema>,
-    replacement: TSchema,
+    replacement: OptionalId<TSchema>,
     options: ReplaceOptions
   ): Promise<UpdateResult | Document>;
   replaceOne(
     filter: Filter<TSchema>,
-    replacement: TSchema,
+    replacement: OptionalId<TSchema>,
     options: ReplaceOptions,
     callback: Callback<UpdateResult | Document>
   ): void;
   replaceOne(
     filter: Filter<TSchema>,
-    replacement: TSchema,
+    replacement: OptionalId<TSchema>,
     options?: ReplaceOptions | Callback<UpdateResult | Document>,
     callback?: Callback<UpdateResult | Document>
   ): Promise<UpdateResult | Document> | void {

test/types/community/collection/bulkWrite.test-d.ts

@@ -181,6 +181,24 @@ collectionType.bulkWrite([
     }
   }
 ]);
+// allow a replacement doc without an _id
+collectionType.bulkWrite([
+  {
+    replaceOne: {
+      filter: {},
+      replacement: {
+        dateField: new Date(),
+        fruitTags: [],
+        numberField: 0,
+        readonlyFruitTags: [],
+        stringField: 'string',
+        subInterfaceArray: [],
+        subInterfaceField: { field1: '1', field2: '2' }
+      },
+      upsert: true
+    }
+  }
+]);
 
 expectError(
   collectionType.bulkWrite([

test/types/community/collection/replaceX.test-d.ts

@@ -0,0 +1,22 @@
+import { expectError } from 'tsd';
+import { MongoClient, ObjectId } from '../../../../src';
+
+// test collection.replaceX functions
+const client = new MongoClient('');
+const db = client.db('test');
+
+interface TestModel {
+  _id: ObjectId;
+  stringField: string;
+}
+
+const collection = db.collection<TestModel>('testCollection');
+
+// should accept a replacement doc with an _id
+await collection.replaceOne({}, { _id: new ObjectId(), stringField: 'a' });
+
+// should accept a replacement doc without an _id
+await collection.replaceOne({}, { stringField: 'b' });
+
+// should not allow _id with a non-ObjectId type
+expectError(await collection.replaceOne({}, { _id: 1, stringField: 'c' }));