feat: Remove deprecation DEPPS1: Native MongoDB syntax in aggregation pipeline (parse-community#8362)

BREAKING CHANGE: The MongoDB aggregation pipeline requires native MongoDB syntax instead of the custom Parse Server syntax; for example pipeline stage names require a leading dollar sign like `$match` and the MongoDB document ID is referenced using `_id` instead of `objectId` (parse-community#8362)

Author: dblythy

Diff for: DEPRECATIONS.md

@@ -4,7 +4,7 @@ The following is a list of deprecations, according to the [Deprecation Policy](h
 
 | ID     | Change                                          | Issue                                                                | Deprecation [ℹ️][i_deprecation] | Planned Removal [ℹ️][i_removal] | Status [ℹ️][i_status] | Notes |
 |--------|-------------------------------------------------|----------------------------------------------------------------------|---------------------------------|---------------------------------|-----------------------|-------|
-| DEPPS1 | Native MongoDB syntax in aggregation pipeline   | [#7338](https://github.com/parse-community/parse-server/issues/7338) | 5.0.0 (2022)                    | 6.0.0 (2023)                    | deprecated            | -     |
+| DEPPS1 | Native MongoDB syntax in aggregation pipeline   | [#7338](https://github.com/parse-community/parse-server/issues/7338) | 5.0.0 (2022)                    | 6.0.0 (2023)                    | removed            | -     |
 | DEPPS2 | Config option `directAccess` defaults to `true` | [#6636](https://github.com/parse-community/parse-server/pull/6636)   | 5.0.0 (2022)                    | 6.0.0 (2023)                    | removed            | -     |
 | DEPPS3 | Config option `enforcePrivateUsers` defaults to `true` | [#7319](https://github.com/parse-community/parse-server/pull/7319)   | 5.0.0 (2022)                    | 6.0.0 (2023)                    | removed            | -     |
 | DEPPS4 | Remove convenience method for http request `Parse.Cloud.httpRequest` | [#7589](https://github.com/parse-community/parse-server/pull/7589)   | 5.0.0 (2022)                    | 6.0.0 (2023)                    | removed            | -     |

Diff for: spec/AggregateRouter.spec.js

@@ -1,34 +1,31 @@
 const AggregateRouter = require('../lib/Routers/AggregateRouter').AggregateRouter;
 
 describe('AggregateRouter', () => {
-  // TODO: update pipeline syntax. See [#7339](https://bit.ly/3incnWx)
   it('get pipeline from Array', () => {
     const body = [
       {
-        group: { objectId: {} },
+        $group: { _id: {} },
       },
     ];
     const expected = [{ $group: { _id: {} } }];
     const result = AggregateRouter.getPipeline(body);
     expect(result).toEqual(expected);
   });
 
-  // TODO: update pipeline syntax. See [#7339](https://bit.ly/3incnWx)
   it('get pipeline from Object', () => {
     const body = {
-      group: { objectId: {} },
+      $group: { _id: {} },
     };
     const expected = [{ $group: { _id: {} } }];
     const result = AggregateRouter.getPipeline(body);
     expect(result).toEqual(expected);
   });
 
-  // TODO: update pipeline syntax. See [#7339](https://bit.ly/3incnWx)
   it('get pipeline from Pipeline Operator (Array)', () => {
     const body = {
       pipeline: [
         {
-          group: { objectId: {} },
+          $group: { _id: {} },
         },
       ],
     };
@@ -37,55 +34,53 @@ describe('AggregateRouter', () => {
     expect(result).toEqual(expected);
   });
 
-  // TODO: update pipeline syntax. See [#7339](https://bit.ly/3incnWx)
   it('get pipeline from Pipeline Operator (Object)', () => {
     const body = {
       pipeline: {
-        group: { objectId: {} },
+        $group: { _id: {} },
       },
     };
     const expected = [{ $group: { _id: {} } }];
     const result = AggregateRouter.getPipeline(body);
     expect(result).toEqual(expected);
   });
 
-  // TODO: update pipeline syntax. See [#7339](https://bit.ly/3incnWx)
   it('get pipeline fails multiple keys in Array stage ', () => {
     const body = [
       {
-        group: { objectId: {} },
-        match: { name: 'Test' },
+        $group: { _id: {} },
+        $match: { name: 'Test' },
       },
     ];
-    try {
-      AggregateRouter.getPipeline(body);
-    } catch (e) {
-      expect(e.message).toBe('Pipeline stages should only have one key found group, match');
-    }
+    expect(() => AggregateRouter.getPipeline(body)).toThrow(
+      new Parse.Error(
+        Parse.Error.INVALID_QUERY,
+        'Pipeline stages should only have one key but found $group, $match.'
+      )
+    );
   });
 
-  // TODO: update pipeline syntax. See [#7339](https://bit.ly/3incnWx)
   it('get pipeline fails multiple keys in Pipeline Operator Array stage ', () => {
     const body = {
       pipeline: [
         {
-          group: { objectId: {} },
-          match: { name: 'Test' },
+          $group: { _id: {} },
+          $match: { name: 'Test' },
         },
       ],
     };
-    try {
-      AggregateRouter.getPipeline(body);
-    } catch (e) {
-      expect(e.message).toBe('Pipeline stages should only have one key found group, match');
-    }
+    expect(() => AggregateRouter.getPipeline(body)).toThrow(
+      new Parse.Error(
+        Parse.Error.INVALID_QUERY,
+        'Pipeline stages should only have one key but found $group, $match.'
+      )
+    );
   });
 
-  // TODO: update pipeline syntax. See [#7339](https://bit.ly/3incnWx)
   it('get search pipeline from Pipeline Operator (Array)', () => {
     const body = {
       pipeline: {
-        search: {},
+        $search: {},
       },
     };
     const expected = [{ $search: {} }];
@@ -105,7 +100,7 @@ describe('AggregateRouter', () => {
   it('support nested stage names starting with `$`', () => {
     const body = [
       {
-        lookup: {
+        $lookup: {
           from: 'ACollection',
           let: { id: '_id' },
           as: 'results',
@@ -145,11 +140,11 @@ describe('AggregateRouter', () => {
 
   it('support the use of `_id` in stages', () => {
     const body = [
-      { match: { _id: 'randomId' } },
-      { sort: { _id: -1 } },
-      { addFields: { _id: 1 } },
-      { group: { _id: {} } },
-      { project: { _id: 0 } },
+      { $match: { _id: 'randomId' } },
+      { $sort: { _id: -1 } },
+      { $addFields: { _id: 1 } },
+      { $group: { _id: {} } },
+      { $project: { _id: 0 } },
     ];
     const expected = [
       { $match: { _id: 'randomId' } },
@@ -161,4 +156,19 @@ describe('AggregateRouter', () => {
     const result = AggregateRouter.getPipeline(body);
     expect(result).toEqual(expected);
   });
+
+  it('should throw with invalid stage', () => {
+    expect(() => AggregateRouter.getPipeline([{ foo: 'bar' }])).toThrow(
+      new Parse.Error(Parse.Error.INVALID_QUERY, `Invalid aggregate stage 'foo'.`)
+    );
+  });
+
+  it('should throw with invalid group', () => {
+    expect(() => AggregateRouter.getPipeline([{ $group: { objectId: 'bar' } }])).toThrow(
+      new Parse.Error(
+        Parse.Error.INVALID_QUERY,
+        `Cannot use 'objectId' in aggregation stage $group.`
+      )
+    );
+  });
 });

Diff for: spec/CloudCode.spec.js

@@ -2774,7 +2774,7 @@ describe('afterFind hooks', () => {
     const obj = new Parse.Object('MyObject');
     const pipeline = [
       {
-        group: { objectId: {} },
+        $group: { _id: {} },
       },
     ];
     obj