fix: Nested date is incorrectly decoded as empty object {} when fetching a Parse Object (#8446)

Author: dblythy

Diff for: spec/MongoStorageAdapter.spec.js

@@ -248,6 +248,10 @@ describe_only_db('mongo')('MongoStorageAdapter', () => {
     expect(object.date[0] instanceof Date).toBeTrue();
     expect(object.bar.date[0] instanceof Date).toBeTrue();
     expect(object.foo.test.date[0] instanceof Date).toBeTrue();
+    const obj = await new Parse.Query('MyClass').first({useMasterKey: true});
+    expect(obj.get('date')[0] instanceof Date).toBeTrue();
+    expect(obj.get('bar').date[0] instanceof Date).toBeTrue();
+    expect(obj.get('foo').test.date[0] instanceof Date).toBeTrue();
   });
 
   it('handles updating a single object with array, object date', done => {

Diff for: src/Adapters/Storage/Mongo/MongoTransform.js

@@ -188,6 +188,16 @@ const transformInteriorValue = restValue => {
   // Handle atomic values
   var value = transformInteriorAtom(restValue);
   if (value !== CannotTransform) {
+    if (value && typeof value === 'object') {
+      if (value instanceof Date) {
+        return value;
+      }
+      if (value instanceof Array) {
+        value = value.map(transformInteriorValue);
+      } else {
+        value = mapValues(value, transformInteriorValue);
+      }
+    }
     return value;
   }
 
@@ -1014,9 +1024,6 @@ function mapValues(object, iterator) {
   const result = {};
   Object.keys(object).forEach(key => {
     result[key] = iterator(object[key]);
-    if (result[key] && JSON.stringify(result[key]).includes(`"__type"`)) {
-      result[key] = mapValues(object[key], iterator);
-    }
   });
   return result;
 }