Database
[{display_id:"38bd6126-02a1-47b9-b567-00aaf2eb076f",user_id:ObjectId("661137f22a31832ceb92ddbc"),product_id:ObjectId("6622376051d5886f39ac7365"),size:ObjectId("660d444d0d7716ee24129675"),qty:3},{display_id:"38bd6126-02a1-47b9-b567-00aaf2eb076f",user_id:ObjectId("661137f22a31832ceb92ddbc"),product_id:ObjectId("662214f8cc5306f999369e99"),size:ObjectId("660d444d0d7716ee24129675"),qty:2},{display_id:"38bd6126-02a1-47b9-b567-00aaf2eb076f",user_id:ObjectId("661137f22a31832ceb92ddbc"),product_id:ObjectId("662214f8cc5306f999369e99"),size:ObjectId("660d444d0d7716ee24129674"),qty:2}]
Query
db.collection.find({"user_id":ObjectId("661137f22a31832ceb92ddbc"),"product_id":ObjectId("662214f8cc5306f999369e99"),"size":ObjectId("660d444d0d7716ee24129675")})