diff --git a/src/.env.example b/.env.example
similarity index 100%
rename from src/.env.example
rename to .env.example
diff --git a/TODO b/TODO
index 4233707..941b83f 100644
--- a/TODO
+++ b/TODO
@@ -1,5 +1,5 @@
 Todo:
   ☐ В *service отлавливать ошибки через try catch
   ☐ SALT из контроллера передается в сервис параметром. Для чего? Почему соль нельзя в сервисе считать из конфига? Нарушение паттерна? Можно перетащить в сервис!!!
-  ☐ В DTO добавить валидацию
-  ☐ кол-во коментов динамически https://stackoverflow.com/questions/48389112/mongodb-best-practice-to-count-related-documents
+  ✔ В DTO добавить валидацию @done(24-10-12 13:12)
+  ✔ кол-во коментов динамически https://stackoverflow.com/questions/48389112/mongodb-best-practice-to-count-related-documents @done(24-10-12 13:12)
diff --git a/src/shared/modules/offer/default-offer-service.ts b/src/shared/modules/offer/default-offer-service.ts
index d23d916..2195f37 100644
--- a/src/shared/modules/offer/default-offer-service.ts
+++ b/src/shared/modules/offer/default-offer-service.ts
@@ -57,7 +57,21 @@ export class DefaultOfferService implements OfferService {
   }
 
   async findById(offerId: string): Promise<OfferEntityDocument | null> {
-    return await this.offerModel.findById(offerId).populate(['userId']).exec();
+    const [reviews] = await this.reviewModel.aggregate([
+      { $match: { offerId } },
+      { $count: 'reviewsCount' },
+    ]);
+
+    const result = await this.offerModel
+      .findById(offerId)
+      .populate(['userId'])
+      .exec();
+
+    if (result) {
+      Object.assign(result, { reviewsCount: reviews.reviewsCount });
+    }
+
+    return result;
   }
 
   async findPremiumByCity(
@@ -119,16 +133,10 @@ export class DefaultOfferService implements OfferService {
       .exec();
   }
 
-  async updateRating(offerId: string): Promise<OfferEntityDocument | null> {
-    ///// Очень сомневаюсь в правильности
-    const [{ averageRating }] = await this.reviewModel.aggregate([
-      { $match: { offerId } },
-      { $group: { _id: null, averageRating: { $avg: '$rating' } } },
-    ]);
-
-    return this.offerModel
-      .findByIdAndUpdate(offerId, [{ rating: averageRating }], { new: true })
-      .populate(['userId'])
-      .exec();
+  async updateRating(
+    offerId: string,
+    rating: number
+  ): Promise<OfferEntityDocument | null> {
+    return this.offerModel.findByIdAndUpdate(offerId, { rating }).exec();
   }
 }
diff --git a/src/shared/modules/offer/offer-service.interface.ts b/src/shared/modules/offer/offer-service.interface.ts
index f9e7b7b..68d9c1d 100644
--- a/src/shared/modules/offer/offer-service.interface.ts
+++ b/src/shared/modules/offer/offer-service.interface.ts
@@ -20,6 +20,9 @@ export interface OfferService extends DocumentExists {
     offerId: string,
     isFavorite: number
   ): Promise<OfferEntityDocument | null>;
-  updateRating(offerId: string): Promise<OfferEntityDocument | null>;
+  updateRating(
+    offerId: string,
+    rating: number
+  ): Promise<OfferEntityDocument | null>;
   findFavorites(): Promise<OfferEntityDocument[]>;
 }
diff --git a/src/shared/modules/offer/offer.http b/src/shared/modules/offer/offer.http
index 0b4aa65..959d405 100644
--- a/src/shared/modules/offer/offer.http
+++ b/src/shared/modules/offer/offer.http
@@ -3,7 +3,7 @@ GET http://localhost:4000/offers HTTP/1.1
 
 
 ###
-GET http://localhost:4000/offers/67069067990eba53b6c2b130 HTTP/1.1
+GET http://localhost:4000/offers/670530d901266b562fbdc0ef HTTP/1.1
 
 ###
 POST http://localhost:4000/offers/ HTTP/1.1
diff --git a/src/shared/modules/review/default-review-service.ts b/src/shared/modules/review/default-review-service.ts
index 31ad9fb..747670e 100644
--- a/src/shared/modules/review/default-review-service.ts
+++ b/src/shared/modules/review/default-review-service.ts
@@ -1,7 +1,9 @@
 import { Logger } from '#libs/logger/logger.interface.js';
+import { OfferService } from '#modules/offer/offer-service.interface.js';
 import { Component } from '#types/component.enum.js';
 import { types } from '@typegoose/typegoose';
 import { inject, injectable } from 'inversify';
+import mongoose from 'mongoose';
 import { CreateReviewDto } from './dto/create-review-dto.js';
 import { ReviewEntity } from './review-entity.js';
 import {
@@ -14,17 +16,29 @@ export class DefaultReviewService implements ReviewService {
   constructor(
     @inject(Component.Logger) private readonly logger: Logger,
     @inject(Component.ReviewModel)
-    private readonly reviewModel: types.ModelType<ReviewEntity>
+    private readonly reviewModel: types.ModelType<ReviewEntity>,
+    @inject(Component.OfferService)
+    private readonly offerService: OfferService
   ) {}
 
+  async calculateAverageRating(offerId: string): Promise<number> {
+    const [review] = await this.reviewModel.aggregate<Record<string, number>>([
+      { $match: { offerId: new mongoose.Types.ObjectId(offerId) } },
+      { $group: { _id: null, averageRating: { $avg: '$rating' } } },
+    ]);
+    return +review.averageRating.toFixed(1);
+  }
+
   async create(
     offerId: string,
     dto: CreateReviewDto
   ): Promise<ReviewEntityDocument> {
     const result = await this.reviewModel.create({ ...dto, offerId });
-    this.logger.info('New review created');
+    const averageRating = await this.calculateAverageRating(offerId);
 
-    return result;
+    this.offerService.updateRating(offerId, averageRating);
+    this.logger.info('New review created');
+    return result.populate('userId');
   }
 
   async findByOfferId(offerId: string): Promise<ReviewEntityDocument[] | null> {
diff --git a/src/shared/modules/review/review.http b/src/shared/modules/review/review.http
index 485a4bc..afb69c9 100644
--- a/src/shared/modules/review/review.http
+++ b/src/shared/modules/review/review.http
@@ -6,10 +6,10 @@ POST http://localhost:4000/reviews/670530d901266b562fbdc0ef HTTP/1.1
 Content-Type: application/json
 
 {
-  "offerId": "67069067990eba53b6c2b130",
+  "offerId": "670530d901266b562fbdc0ef",
   "date": "2024-08-10T08:11:23.283Z",
   "userId": "6704f9003df41d32ec047a0e",
   "comment": "test sdhfskdhfks",
-  "rating": 4
+  "rating": 1.3
 }