Auto generated String type #Id in Spring Boot to connect mongo - mongodb

Question

I am incrementing my Autogenerated Id value but I need String type
.This is my service class:
package com.stackroute.orderhistory.service;
import com.stackroute.orderhistory.model.AutogenerateId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;
import org.springframework.stereotype.Service;
import java.util.Objects;
import static org.springframework.data.mongodb.core.FindAndModifyOptions.options;
#Service
public class SequenceGeneratorService {
#Autowired
private MongoOperations mongoOperations;
public String getSequenceNumber(String sequenceName){
Query query=new Query(Criteria.where("order_id").is(sequenceName));
Update update=new Update().inc("seq",1);
AutogenerateId counter = mongoOperations
.findAndModify(query,
update, options().returnNew(true).upsert(true),
AutogenerateId.class);
return !Objects.isNull(counter) ? counter.getSeq() : "1";
}
}
.This is my Entity Class :
import lombok.*;
import org.springframework.data.annotation.Id;
import org.springframework.data.annotation.Transient;
import org.springframework.data.mongodb.core.mapping.Document;
#NoArgsConstructor
#ToString
#AllArgsConstructor
#Getter
#Setter
#Document(collection = "orders")
public class OrderHistoryModel {
#Transient
public static final String SEQUENCE_NAME="Ordersequence";
#Id
private String orderId;
private String productName;
private int orderAmount;
private String orderPlaced;
private String orderStatus;
private String paymentMethod;
private String shippingAddress;
}
.This is my AutoGenerated Entity class :
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;
#Document(collection = "db_sequence")
#Data
#AllArgsConstructor
#NoArgsConstructor
public class AutogenerateId {
#Id
private String id;
private String seq;
}
In this Code I am getting Order_Id as 1,2,3 and so on (In Postman)
But I need Order_Id like order1, order2, order3 and so on...
Please help me out.

Answer 1

In my case, I didn't customise the auto-generation of the id, instead:
in my entity i just annotated the id by #Id s follow:
the DTO:
and here's my service :
the method dtoToUser:
and mongodb will generate a random and unique UUID for me, as follow:
So, Use IDs provided by MongoDB, which are more or less universally unique