fix: custom database options are not passed to MongoDB GridFS (#7911)

Author: dblythy

Diff for: spec/FilesController.spec.js

@@ -43,6 +43,20 @@ describe('FilesController', () => {
     done();
   });
 
+  it_only_db('mongo')('should pass databaseOptions to GridFSBucketAdapter', async () => {
+    await reconfigureServer({
+      databaseURI: 'mongodb://localhost:27017/parse',
+      filesAdapter: null,
+      databaseAdapter: null,
+      databaseOptions: {
+        retryWrites: true,
+      },
+    });
+    const config = Config.get(Parse.applicationId);
+    expect(config.database.adapter._mongoOptions.retryWrites).toBeTrue();
+    expect(config.filesController.adapter._mongoOptions.retryWrites).toBeTrue();
+  });
+
   it('should create a server log on failure', done => {
     const logController = new LoggerController(new WinstonLoggerAdapter());
 

Diff for: src/Controllers/index.js

@@ -91,12 +91,20 @@ export function getLoggerController(options: ParseServerOptions): LoggerControll
 }
 
 export function getFilesController(options: ParseServerOptions): FilesController {
-  const { appId, databaseURI, filesAdapter, databaseAdapter, preserveFileName, fileKey } = options;
+  const {
+    appId,
+    databaseURI,
+    databaseOptions = {},
+    filesAdapter,
+    databaseAdapter,
+    preserveFileName,
+    fileKey,
+  } = options;
   if (!filesAdapter && databaseAdapter) {
     throw 'When using an explicit database adapter, you must also use an explicit filesAdapter.';
   }
   const filesControllerAdapter = loadAdapter(filesAdapter, () => {
-    return new GridFSBucketAdapter(databaseURI, {}, fileKey);
+    return new GridFSBucketAdapter(databaseURI, databaseOptions, fileKey);
   });
   return new FilesController(filesControllerAdapter, appId, {
     preserveFileName,