feat: Support dot notation on Array fields

Author: dplewis

spec/ParseObject.spec.js

@@ -568,6 +568,21 @@ describe('Parse.Object testing', () => {
       );
   });
 
+  it('can increment array nested fields', async () => {
+    const obj = new TestObject();
+    obj.set('items', [ { value: 'a', count: 5 }, { value: 'b', count: 1 } ]);
+    await obj.save();
+
+    obj.increment('items.0.count', 15);
+    obj.increment('items.1.count', 4);
+    await obj.save();
+
+    const query = new Parse.Query(TestObject);
+    const result = await query.get(obj.id);
+    expect(result.get('items')[0].count).toBe(20);
+    expect(result.get('items')[1].count).toBe(5);
+  });
+
   it('addUnique with object', function (done) {
     const x1 = new Parse.Object('X');
     x1.set('stuff', [1, { hello: 'world' }, { foo: 'bar' }]);

src/Controllers/SchemaController.js

@@ -1096,9 +1096,15 @@ export default class SchemaController {
     maintenance?: boolean
   ) {
     if (fieldName.indexOf('.') > 0) {
-      // subdocument key (x.y) => ok if x is of type 'object'
-      fieldName = fieldName.split('.')[0];
-      type = 'Object';
+      // "<array>.<index>" for Nested Array
+      // "<embedded document>.<field>" for Nested Object
+      const [x, y] = fieldName.split('.');
+      fieldName = x;
+      if (!isNaN(y)) {
+        type = 'Array';
+      } else {
+        type = 'Object';
+      }
     }
     let fieldNameToValidate = `${fieldName}`;
     if (maintenance && fieldNameToValidate.charAt(0) === '_') {