feat: Add support for MongoDB query comment

spec/ParseQuery.Comment.spec.js

@@ -0,0 +1,99 @@
+'use strict';
+
+const Config = require('../lib/Config');
+const TestUtils = require('../lib/TestUtils');
+const { MongoClient } = require('mongodb');
+const databaseURI = 'mongodb://localhost:27017/';
+const request = require('../lib/request');
+
+let config, client, database;
+
+const masterKeyHeaders = {
+  'X-Parse-Application-Id': 'test',
+  'X-Parse-Rest-API-Key': 'rest',
+  'X-Parse-Master-Key': 'test',
+  'Content-Type': 'application/json',
+};
+
+const masterKeyOptions = {
+  headers: masterKeyHeaders,
+  json: true,
+};
+
+describe_only_db('mongo')('Parse.Query with comment testing', () => {
+  beforeEach(async () => {
+    config = Config.get('test');
+    client = await MongoClient.connect(databaseURI, {
+      useNewUrlParser: true,
+      useUnifiedTopology: true,
+    });
+    database = client.db('parseServerMongoAdapterTestDatabase');
+    const level = 2;
+    const profiling = await database.command({ profile: level });
+    console.log(`profiling ${JSON.stringify(profiling)}`);
+  });
+
+  afterEach(async () => {
+    await client.close();
+    await TestUtils.destroyAllDataPermanently(false);
+  });
+
+  it('send comment with query through REST', async () => {
+    const comment = 'Hello Parse';
+    const object = new TestObject();
+    object.set('name', 'object');
+    await object.save();
+    const options = Object.assign({}, masterKeyOptions, {
+      url: Parse.serverURL + '/classes/TestObject',
+      qs: {
+        explain: true,
+        comment: comment,
+      },
+    });
+    await request(options);
+    const result = await database.collection('system.profile').findOne({}, { sort: { ts: -1 } });
+    expect(result.command.explain.comment).toBe(comment);
+  });
+
+  it('send comment with query', async () => {
+    const comment = 'Hello Parse';
+    const object = new TestObject();
+    object.set('name', 'object');
+    await object.save();
+    const collection = await config.database.adapter._adaptiveCollection('TestObject');
+    await collection._rawFind({ name: 'object' }, { comment: comment });
+    const result = await database.collection('system.profile').findOne({}, { sort: { ts: -1 } });
+    expect(result.command.comment).toBe(comment);
+  });
+
+  it('send a comment with a count query', async () => {
+    const comment = 'Hello Parse';
+    const object = new TestObject();
+    object.set('name', 'object');
+    await object.save();
+
+    const object2 = new TestObject();
+    object2.set('name', 'object');
+    await object2.save();
+
+    const collection = await config.database.adapter._adaptiveCollection('TestObject');
+    const countResult = await collection.count({ name: 'object' }, { comment: comment });
+    expect(countResult).toEqual(2);
+    const result = await database.collection('system.profile').findOne({}, { sort: { ts: -1 } });
+    expect(result.command.comment).toBe(comment);
+  });
+
+  it('attach a comment to an aggregation', async () => {
+    const comment = 'Hello Parse';
+    const object = new TestObject();
+    object.set('name', 'object');
+    await object.save();
+    const collection = await config.database.adapter._adaptiveCollection('TestObject');
+    await collection.aggregate([{ $group: { _id: '$name' } }], {
+      explain: true,
+      comment: comment,
+    });
+    const result = await database.collection('system.profile').findOne({}, { sort: { ts: -1 } });
+    expect(result.command.explain.comment).toBe(comment);
+  });
+});

src/Adapters/Storage/Mongo/MongoCollection.js

@@ -15,7 +15,18 @@ export default class MongoCollection {
   // idea. Or even if this behavior is a good idea.
   find(
     query,
-    { skip, limit, sort, keys, maxTimeMS, readPreference, hint, caseInsensitive, explain } = {}
+    {
+      skip,
+      limit,
+      sort,
+      keys,
+      maxTimeMS,
+      readPreference,
+      hint,
+      caseInsensitive,
+      explain,
+      comment,
+    } = {}
   ) {
     // Support for Full Text Search - $text
     if (keys && keys.$score) {
@@ -32,6 +43,7 @@ export default class MongoCollection {
       hint,
       caseInsensitive,
       explain,
+      comment,
     }).catch(error => {
       // Check for "no geoindex" error
       if (error.code != 17007 && !error.message.match(/unable to find index for .geoNear/)) {
@@ -60,6 +72,7 @@ export default class MongoCollection {
               hint,
               caseInsensitive,
               explain,
+              comment,
             })
           )
       );
@@ -75,14 +88,26 @@ export default class MongoCollection {
 
   _rawFind(
     query,
-    { skip, limit, sort, keys, maxTimeMS, readPreference, hint, caseInsensitive, explain } = {}
+    {
+      skip,
+      limit,
+      sort,
+      keys,
+      maxTimeMS,
+      readPreference,
+      hint,
+      caseInsensitive,
+      explain,
+      comment,
+    } = {}
   ) {
     let findOperation = this._mongoCollection.find(query, {
       skip,
       limit,
       sort,
       readPreference,
       hint,
+      comment,
     });
 
     if (keys) {
@@ -100,7 +125,7 @@ export default class MongoCollection {
     return explain ? findOperation.explain(explain) : findOperation.toArray();
   }
 
-  count(query, { skip, limit, sort, maxTimeMS, readPreference, hint } = {}) {
+  count(query, { skip, limit, sort, maxTimeMS, readPreference, hint, comment } = {}) {
     // If query is empty, then use estimatedDocumentCount instead.
     // This is due to countDocuments performing a scan,
     // which greatly increases execution time when being run on large collections.
@@ -118,6 +143,7 @@ export default class MongoCollection {
       maxTimeMS,
       readPreference,
       hint,
+      comment,
     });
 
     return countOperation;
@@ -127,9 +153,9 @@ export default class MongoCollection {
     return this._mongoCollection.distinct(field, query);
   }
 
-  aggregate(pipeline, { maxTimeMS, readPreference, hint, explain } = {}) {
+  aggregate(pipeline, { maxTimeMS, readPreference, hint, explain, comment } = {}) {
     return this._mongoCollection
-      .aggregate(pipeline, { maxTimeMS, readPreference, hint, explain })
+      .aggregate(pipeline, { maxTimeMS, readPreference, hint, explain, comment })
       .toArray();
   }
 

src/Adapters/Storage/Mongo/MongoStorageAdapter.js

@@ -603,7 +603,17 @@ export class MongoStorageAdapter implements StorageAdapter {
     className: string,
     schema: SchemaType,
     query: QueryType,
-    { skip, limit, sort, keys, readPreference, hint, caseInsensitive, explain }: QueryOptions
+    {
+      skip,
+      limit,
+      sort,
+      keys,
+      readPreference,
+      hint,
+      caseInsensitive,
+      explain,
+      comment,
+    }: QueryOptions
   ): Promise<any> {
     validateExplainValue(explain);
     schema = convertParseSchemaToMongoSchema(schema);
@@ -646,6 +656,7 @@ export class MongoStorageAdapter implements StorageAdapter {
           hint,
           caseInsensitive,
           explain,
+          comment,
         })
       )
       .then(objects => {
@@ -735,7 +746,9 @@ export class MongoStorageAdapter implements StorageAdapter {
     schema: SchemaType,
     query: QueryType,
     readPreference: ?string,
-    hint: ?mixed
+    _estimate: ?boolean,
+    hint: ?mixed,
+    comment: ?string
   ) {
     schema = convertParseSchemaToMongoSchema(schema);
     readPreference = this._parseReadPreference(readPreference);
@@ -745,6 +758,7 @@ export class MongoStorageAdapter implements StorageAdapter {
           maxTimeMS: this._maxTimeMS,
           readPreference,
           hint,
+          comment,
         })
       )
       .catch(err => this.handleError(err));
@@ -777,7 +791,8 @@ export class MongoStorageAdapter implements StorageAdapter {
     pipeline: any,
     readPreference: ?string,
     hint: ?mixed,
-    explain?: boolean
+    explain?: boolean,
+    comment: ?string
   ) {
     validateExplainValue(explain);
     let isPointerField = false;
@@ -811,6 +826,7 @@ export class MongoStorageAdapter implements StorageAdapter {
           maxTimeMS: this._maxTimeMS,
           hint,
           explain,
+          comment,
         })
       )
       .then(results => {

src/Adapters/Storage/StorageAdapter.js

@@ -19,6 +19,7 @@ export type QueryOptions = {
   caseInsensitive?: boolean,
   action?: string,
   addsField?: boolean,
+  comment?: string,
 };
 
 export type UpdateQueryOptions = {
@@ -97,7 +98,8 @@ export interface StorageAdapter {
     query: QueryType,
     readPreference?: string,
     estimate?: boolean,
-    hint?: mixed
+    hint?: mixed,
+    comment?: string
   ): Promise<number>;
   distinct(
     className: string,
@@ -111,7 +113,8 @@ export interface StorageAdapter {
     pipeline: any,
     readPreference: ?string,
     hint: ?mixed,
-    explain?: boolean
+    explain?: boolean,
+    comment?: string
   ): Promise<any>;
   performInitialization(options: ?any): Promise<void>;
   watch(callback: () => void): void;

src/Controllers/DatabaseController.js

@@ -1188,6 +1188,7 @@ class DatabaseController {
       hint,
       caseInsensitive = false,
       explain,
+      comment,
     }: any = {},
     auth: any = {},
     validSchemaController: SchemaController.SchemaController
@@ -1237,6 +1238,7 @@ class DatabaseController {
             hint,
             caseInsensitive: this.options.enableCollationCaseComparison ? false : caseInsensitive,
             explain,
+            comment,
           };
           Object.keys(sort).forEach(fieldName => {
             if (fieldName.match(/^authData\.([a-zA-Z0-9_]+)\.id$/)) {
@@ -1306,7 +1308,8 @@ class DatabaseController {
                     query,
                     readPreference,
                     undefined,
-                    hint
+                    hint,
+                    comment
                   );
                 }
               } else if (distinct) {
@@ -1325,7 +1328,8 @@ class DatabaseController {
                     pipeline,
                     readPreference,
                     hint,
-                    explain
+                    explain,
+                    comment
                   );
                 }
               } else if (explain) {

src/RestQuery.js

@@ -212,6 +212,7 @@ function _UnsafeRestQuery(
       case 'skip':
       case 'limit':
       case 'readPreference':
+      case 'comment':
         this.findOptions[option] = restOptions[option];
         break;
       case 'order':

src/Routers/AggregateRouter.js

@@ -19,6 +19,10 @@ export class AggregateRouter extends ClassesRouter {
       options.explain = body.explain;
       delete body.explain;
     }
+    if (body.comment) {
+      options.comment = body.comment;
+      delete body.comment;
+    }
     if (body.readPreference) {
       options.readPreference = body.readPreference;
       delete body.readPreference;

src/Routers/ClassesRouter.js

@@ -166,6 +166,7 @@ export class ClassesRouter extends PromiseRouter {
       'subqueryReadPreference',
       'hint',
       'explain',
+      'comment',
     ];
 
     for (const key of Object.keys(body)) {
@@ -215,6 +216,9 @@ export class ClassesRouter extends PromiseRouter {
     if (body.explain) {
       options.explain = body.explain;
     }
+    if (body.comment && typeof body.comment === 'string') {
+      options.comment = body.comment;
+    }
     return options;
   }
 

src/triggers.js

@@ -576,6 +576,10 @@ export function maybeRunQueryTrigger(
           restOptions = restOptions || {};
           restOptions.hint = jsonQuery.hint;
         }
+        if (jsonQuery.comment) {
+          restOptions = restOptions || {};
+          restOptions.comment = jsonQuery.comment;
+        }
         if (requestObject.readPreference) {
           restOptions = restOptions || {};
           restOptions.readPreference = requestObject.readPreference;