func GetComboPackFeedbackData(col string, id bson.ObjectId) ([]ComboFeedbacksData, error) {

	var comboFeedbacks []ComboFeedbacksData
	var customQuery mongowrapper.Query

	pipeline := []bson.M{
		bson.M{mongo.MONGO_KEYWORD_MATCH: bson.M{KEY_PRODUCT_ID: id}},
		bson.M{mongo.MONGO_KEYWORD_PROJECT: bson.M{"title": 1, "testPacks": "$items"}},
		bson.M{mongo.MONGO_KEYWORD_UNWIND: "$testPacks"},

		bson.M{
			mongo.MONGO_KEYWORD_LOOKUP: bson.M{
				mongo.MONGO_KEYWORD_LOOKUP_FROM:         TBConstants.COLLECTION_PRODUCT_NAME,
				mongo.MONGO_KEYWORD_LOOKUP_LOCALFIELD:   "testPacks.id",
				mongo.MONGO_KEYWORD_LOOKUP_FOREIGNFIELD: "_id",
				mongo.MONGO_KEYWORD_LOOKUP_AS:           "testPack",
			},
		},
		bson.M{mongo.MONGO_KEYWORD_PROJECT: bson.M{"title": 1, "testPack": bson.M{mongo.MONGO_KEYWORD_ARRAYELEMAT: []interface{}{"$testPack", 0}}}},
		bson.M{mongo.MONGO_KEYWORD_UNWIND: "$testPack.items"},
		bson.M{mongo.MONGO_KEYWORD_PROJECT: bson.M{
			"title":      1,
			"testPack":   1,
			"testId":     "$testPack.items.id",
			"testPackId": "$testPack._id",
		},
		},
		bson.M{
			mongo.MONGO_KEYWORD_LOOKUP: bson.M{
				mongo.MONGO_KEYWORD_LOOKUP_FROM:         TBConstants.COLLECTION_ENTITY_FEEDBACKS_NAME,
				mongo.MONGO_KEYWORD_LOOKUP_LOCALFIELD:   "testPack.items.id",
				mongo.MONGO_KEYWORD_LOOKUP_FOREIGNFIELD: "docId",
				mongo.MONGO_KEYWORD_LOOKUP_AS:           "feedbacks",
			},
		},
		bson.M{mongo.MONGO_KEYWORD_UNWIND: bson.M{
			mongo.MONGO_KEYWORD_UNWIND_PATH:     "$feedbacks",
			mongo.MONGO_KEYWORD_UNWIND_PRESERVE: true,
		},
		},

		bson.M{mongo.MONGO_KEYWORD_GROUP: bson.M{
			"_id":           "$testId",
			"title":         bson.M{mongo.MONGO_KEYWORD_FIRST: "$title"},
			"testPackTitle": bson.M{mongo.MONGO_KEYWORD_FIRST: "$testPack.title"},
			"testPackId":    bson.M{mongo.MONGO_KEYWORD_FIRST: "$testPackId"},
			"avgRating":     bson.M{mongo.MONGO_KEYWORD_AVG: "$feedbacks.rating"},
		},
		},

		bson.M{mongo.MONGO_KEYWORD_GROUP: bson.M{
			"_id":           "$testPackId",
			"title":         bson.M{mongo.MONGO_KEYWORD_FIRST: "$title"},
			"testPackTitle": bson.M{mongo.MONGO_KEYWORD_FIRST: "$testPackTitle"},
			"testIds":       bson.M{mongo.MONGO_KEYWORD_PUSH: "$_id"},
			"avgRatings":    bson.M{mongo.MONGO_KEYWORD_PUSH: "$avgRating"},
			"tp_avgRating":  bson.M{mongo.MONGO_KEYWORD_AVG: "$avgRating"},
		},
		},
	}

	err := customQuery.C(col).Pipe(pipeline).AllowDiskUse().All(&comboFeedbacks)
	return comboFeedbacks, err

}