MongoDB开发之 更新和删除

该篇介绍MongoDB更新以及删除操作。

代码

添加服务代码：

> vim src/main/java/com/example/mymongodb/MongoService2.java

package com.example.mymongodb;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;

import static org.springframework.data.mongodb.core.query.Criteria.where;
import static org.springframework.data.mongodb.core.query.Query.query;

/**
 * @author by Remer
 * @date on 2020-12-23
 */

@Service
public class MongoService2 {

    private MongoTemplate mongoTemplate;

    @Autowired
    public MongoService2(MongoTemplate mongoTemplate) {
        this.mongoTemplate = mongoTemplate;
    }

    public Machine findOne(String machineName) {
        Query query = query(where("machineName").is(machineName));
        Machine machine = mongoTemplate.findOne(query, Machine.class);
        return machine;
    }

    public Machine save(Machine machine) {
        return mongoTemplate.save(machine);
    }

    public String delete(Machine machine) {
        mongoTemplate.remove(machine);
        return "success";
    }
}

添加控制器代码：

> vim src/main/java/com/example/mymongodb/MongoController2.java

package com.example.mymongodb;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author by Remer
 * @date on 2020-12-23
 */

@RestController
public class MongoController2 {

    private MongoService2 mongoService;

    @Autowired
    public MongoController2(MongoService2 mongoService) {
        this.mongoService = mongoService;
    }

    @PostMapping("/machines/{machineName}")
    public Machine update(@PathVariable String machineName) {
        Machine machine = mongoService.findOne(machineName);
        machine.setMachineName("更新机械名字");
        machine.setFenceName("更新围栏名字");
        return mongoService.save(machine);
    }

    @GetMapping("/machines/{machineName}")
    public Machine detail(@PathVariable String machineName) {
        return mongoService.findOne(machineName);
    }

    @DeleteMapping("/machines/{machineName}")
    public String delete(@PathVariable String machineName) {

        Machine machine = mongoService.findOne(machineName);
        return mongoService.delete(machine);
    }
}

单条查询

执行请求：

(GET) http://localhost:8082/machines/测试机械1

返回结果：

{
    "id": "5fe31e00370f2869d94f5489",
    "machineName": "测试机械1",
    "fenceName": "测试机械围栏1",
    "remark": "测试机械备注1"
}

单条编辑

(POST) http://localhost:8082/machines/测试机械1

返回结果：

{
    "id": "5fe31e00370f2869d94f5489",
    "machineName": "更新机械名字",
    "fenceName": "更新围栏名字",
    "remark": "测试机械备注1"
}

单条删除

(DELETE) http://localhost:8082/machines/测试机械1

返回结果：

success

查询结果：

(GET) http://localhost:8082/machines/测试机械1

null

参考

Spring Data MongoDB
lombook