如何使用MongoDB存儲庫在Spring Boot中按其他不是ID的內容進行搜索

Question

我正在開發一個應用程序，該應用程序要按名稱搜索城市。從中提取信息的數據庫是MongoDB數據庫，其屬性為ID，城市，位置，人口和州。 我有以下實體：

 public class Cities {
        @Id
        private String _id;
        private String city;
        private String[] loc;
        private String pop;
        private String state;

        public String get_id() {
            return _id;
        }

        public void set_id(String _id) {
            this._id = _id;
        }

        String getLocation() {
            return loc[0] + " " + loc[1];
        }

        public String getCity() {
            return city;
        }

        public void setCity(String city) {
            this.city = city;
        }

        public String[] getLoc() {
            return loc;
        }

        public void setLoc(String[] loc) {
            this.loc = loc;
        }

        public String getPop() {
            return pop;
        }

        public void setPop(String pop) {
            this.pop = pop;
        }

        public String getState() {
            return state;
        }

        public void setState(String state) {
            this.state = state;
        }

        @Override
        public String toString() {
            return "Cities{" +
                    "_id='" + _id + '\'' +
                    ", city='" + city + '\'' +
                    ", loc=" + Arrays.toString(loc) +
                    ", pop='" + pop + '\'' +
                    ", state='" + state + '\'' +
                    '}';
        }
    }

我的控制器如下所示：

import com.sbmongo.starbucks.Constant.ViewConstant;
import com.sbmongo.starbucks.Entity.Cities;
import com.sbmongo.starbucks.Repository.CitiesRepository;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/starbucks")
public class CitiesController {

    @Autowired
    @Qualifier("citiesRepository")
    private CitiesRepository citiesRepository;

    @GetMapping("/cities")
    public ModelAndView listCities(){
        ModelAndView mav = new ModelAndView(ViewConstant.CITIES);
        mav.addObject("cities", citiesRepository.findAll());
        return mav;
    }

    @GetMapping("/searchCity")
    public ModelAndView searchCity(@RequestParam(name = "city", required = false)String city){
        ModelAndView mav = new ModelAndView(ViewConstant.CITIES);
        mav.addObject("cities", citiesRepository.findByCity(city));
        return mav;
    }
}

我的資料庫：

import java.util.List;

@Repository("citiesRepository")
public interface CitiesRepository extends MongoRepository<Cities, String> {
    public Cities findBy_id(ObjectId _id);
    public Cities findByCity(String city);
}

以及我使用Thymeleaf的HTML：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" type="text/css" href="../css/bootstrap.min.css">
    <title>Starbucks</title>
</head>
<body>
<div class="container">
    <div class="row justify-content-center">
        <div class="col">
            <table class="table">
                <thead>
                <tr>
                    <th>Id</th>
                    <th>City</th>
                    <th>Location</th>
                    <th>Population</th>
                    <th>State</th>
                </tr>
                </thead>
                <tbody>
                <tr th:each="city : ${cities}">
                    <td th:text="${city._id}"></td>
                    <td th:text="${city.city}"></td>
                    <td th:text="${#strings.arrayJoin(city.loc, ' ')}"></td>
                    <td th:text="${city.pop}"></td>
                    <td th:text="${city.state}"></td>
                </tr>
                </tbody>
            </table>
        </div>
    </div>

</div>


<script src="../js/jquery-3.3.1.min.js"></script>
<script src="../js/popper.min.js"></script>
<script src="../js/bootstrap.min.js"></script>
</body>
</html>

我想按城市名稱搜索城市，我從視圖中發送城市名稱，然后在Controller中接收它，但看起來我的存儲庫中的findByCity（）方法不起作用。 我怎么解決這個問題？

Answer 1

findByCity（）應該返回一個列表try：

 public List<Cities> findByCity(String city);

如何使用MongoDB存儲庫在Spring Boot中按其他不是ID的內容進行搜索

問題描述

1 個解決方案

解決方案1
2 已采納 2019-03-01 19:35:12

如何使用MongoDB存儲庫在Spring Boot中按其他不是ID的內容進行搜索

問題描述

1 個解決方案

解決方案1 2 已采納 2019-03-01 19:35:12

解決方案1
2 已采納 2019-03-01 19:35:12