feat: Extend storage adapter interface to optionally return matchedCount and modifiedCount from DatabaseController.update with many: true

spec/DatabaseController.spec.js

@@ -841,6 +841,102 @@ describe('DatabaseController', function () {
       expect(findOneAndUpdateSpy).toHaveBeenCalled();
     });
   });
+
+  describe_only_db('mongo')('update with many', () => {
+    it('should return matchedCount and modifiedCount when multiple docs are updated', async () => {
+      const config = Config.get(Parse.applicationId);
+      const obj1 = new Parse.Object('TestObject');
+      const obj2 = new Parse.Object('TestObject');
+      const obj3 = new Parse.Object('TestObject');
+      obj1.set('status', 'pending');
+      obj2.set('status', 'pending');
+      obj3.set('status', 'pending');
+      await Parse.Object.saveAll([obj1, obj2, obj3]);
+
+      const result = await config.database.update(
+        'TestObject',
+        { status: 'pending' },
+        { status: 'done' },
+        { many: true }
+      );
+
+      expect(result.matchedCount).toBe(3);
+      expect(result.modifiedCount).toBe(3);
+    });
+
+    it('should return matchedCount > 0 and modifiedCount 0 when values are already current', async () => {
+      const config = Config.get(Parse.applicationId);
+      const obj1 = new Parse.Object('TestObject');
+      const obj2 = new Parse.Object('TestObject');
+      obj1.set('status', 'done');
+      obj2.set('status', 'done');
+      await Parse.Object.saveAll([obj1, obj2]);
+
+      const result = await config.database.update(
+        'TestObject',
+        { status: 'done' },
+        { status: 'done' },
+        { many: true }
+      );
+
+      expect(result.matchedCount).toBe(2);
+      expect(result.modifiedCount).toBe(0);
+    });
+
+    it('should return matchedCount 0 and modifiedCount 0 when no docs match', async () => {
+      const config = Config.get(Parse.applicationId);
+      const result = await config.database.update(
+        'TestObject',
+        { status: 'nonexistent' },
+        { status: 'done' },
+        { many: true }
+      );
+
+      expect(result.matchedCount).toBe(0);
+      expect(result.modifiedCount).toBe(0);
+    });
+
+    it('should return only matchedCount and modifiedCount for op-based updates', async () => {
+      const config = Config.get(Parse.applicationId);
+      const obj1 = new Parse.Object('TestObject');
+      const obj2 = new Parse.Object('TestObject');
+      obj1.set('score', 1);
+      obj2.set('score', 1);
+      await Parse.Object.saveAll([obj1, obj2]);
+
+      const result = await config.database.update(
+        'TestObject',
+        { score: { $exists: true } },
+        { score: { __op: 'Increment', amount: 5 } },
+        { many: true }
+      );
+
+      expect(result.matchedCount).toBe(2);
+      expect(result.modifiedCount).toBe(2);
+      expect(Object.keys(result)).toEqual(['matchedCount', 'modifiedCount']);
+    });
+
+    it('should return raw adapter result when skipSanitization is true', async () => {
+      const config = Config.get(Parse.applicationId);
+      const obj1 = new Parse.Object('TestObject');
+      obj1.set('status', 'pending');
+      await obj1.save();
+
+      const result = await config.database.update(
+        'TestObject',
+        { status: 'pending' },
+        { status: 'done' },
+        { many: true },
+        true // skipSanitization
+      );
+
+      // skipSanitization returns raw adapter result, which for MongoDB
+      // includes additional fields beyond matchedCount and modifiedCount
+      expect(result.matchedCount).toBe(1);
+      expect(result.modifiedCount).toBe(1);
+      expect(result.acknowledged).toBe(true);
+    });
+  });
 });
 
 function buildCLP(pointerNames) {

src/Adapters/Storage/StorageAdapter.js

@@ -29,6 +29,11 @@ export type UpdateQueryOptions = {
 
 export type FullQueryOptions = QueryOptions & UpdateQueryOptions;
 
+export type UpdateManyResult = {
+  matchedCount?: number,
+  modifiedCount?: number,
+};
+
 export interface StorageAdapter {
   canSortOnJoinTables: boolean;
   schemaCacheTtl: ?number;
@@ -56,13 +61,19 @@ export interface StorageAdapter {
     query: QueryType,
     transactionalSession: ?any
   ): Promise<void>;
+  /**
+   * Updates all objects that match the given query.
+   * Adapters may return an `UpdateManyResult` with optional `matchedCount` and `modifiedCount`
+   * to indicate how many documents were matched and modified. If not provided, the caller
+   * receives `undefined` for these fields.
+   */
   updateObjectsByQuery(
     className: string,
     schema: SchemaType,
     query: QueryType,
     update: any,
     transactionalSession: ?any
-  ): Promise<[any]>;
+  ): Promise<[any] | UpdateManyResult>;
   findOneAndUpdate(
     className: string,
     schema: SchemaType,

src/Controllers/DatabaseController.js

@@ -533,6 +533,13 @@ class DatabaseController {
       });
   }
 
+  /**
+   * Updates objects in the database that match the given query.
+   * @param {Object} options
+   * @param {boolean} [options.many=false] When true, updates all matching documents
+   *   and returns `{ matchedCount, modifiedCount }` where values are numbers if the
+   *   storage adapter supports `UpdateManyResult`, or `undefined` otherwise.
+   */
   update(
     className: string,
     query: any,
@@ -701,6 +708,16 @@ class DatabaseController {
           if (skipSanitization) {
             return Promise.resolve(result);
           }
+          if (many) {
+            return {
+              matchedCount: typeof result?.matchedCount === 'number'
+                ? result.matchedCount
+                : undefined,
+              modifiedCount: typeof result?.modifiedCount === 'number'
+                ? result.modifiedCount
+                : undefined,
+            };
+          }
           return this._sanitizeDatabaseResult(originalUpdate, result);
         });
     });