多對一關系的 JPQL @Query

Question

我需要一些幫助。 我有 2 個實體：

約會類

@Entity
@Table(name = "appointment")
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Appointment {
    
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    
    @Column(name = "created_date")
    private Date createdDate;
    
    @Column(name = "modified_date")
    private Date modifiedDate;
    
    @Column(name = "appointment_date")
    private LocalDate appointmentDate;
    
    @Column(name = "start_time")
    private LocalTime startTime;
    
    private Boolean cancelled;
    
    @ManyToOne
    @JoinColumn(nullable = false, name = "client_id")
    private Client clientId;
    
    @ManyToOne
    @JoinColumn(nullable = false, name = "employee_id")
    private Employee employee; 
    
    @ManyToOne
    @JoinColumn(nullable = false, name = "service_id")
    private Service service;
}

和Employee.class

@Entity
@Table(name = "employee")
@NoArgsConstructor
@AllArgsConstructor
public class Employee {
    
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    
    @Column(name = "first_name")
    private String firstName;

    @Column(name = "last_name")
    private String lastName;
    
    @Column(name = "created_date")
    private Date createdDate;
    
    @Column(name = " modified_date")
    private Date modifiedDate;
    
    @OneToOne
    @JoinColumn(name = "service_id", referencedColumnName = "id")
    private Service service; 
}

我需要獲取與給定的startTime 、 appointmentDate和employee匹配的所有約會 我想在接口AppointmentRepo中定義一個抽象方法，以便在我的AppointmentServices.class中我可以使用 3 個參數調用該方法並獲取約會實體。

約會服務類

appointmentRepo.getAppointmentByDateAndEmployee(date, employee, scheduledHour);

AppointmentRepo 接口

@Repository
public interface AppointmentRepo extends JpaRepository<Appointment, Integer>{
    
    @Query("SELECT a FROM Appointment a INNER JOIN a.employee e WHERE a.appointmentDate = :appointment_date AND e = :employee AND s.startTime = :start_time")
    public List<Appointment> getAppointmentByDateAndEmployee (@Param("appointment_date") LocalDate appointmentDate, 
            @Param("employee_id") Employee employee, @Param("start_time") LocalTime startTime); 

}

我必須如何設置我的@Query 才能獲得與 3 個給定參數（日期和時間以及對其他名為 Employee 的實體的引用）匹配的約會實體我是否在匹配整個對象時做錯了所以我只需要使用 Employee 實體的 id？

請幫助我，感謝您的寶貴時間！ 節日快樂

Answer 1

您可以使用 SQL 而不是 HQL (nativeQuery=true)

道層

package com.jb.app.repos;

import com.jb.app.beans.Appointment;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.stereotype.Repository;

import java.time.LocalDate;
import java.time.LocalTime;
import java.util.List;

@Repository
public interface AppointmentRepository extends JpaRepository<Appointment, Integer> {

    @Query(value = "SELECT * FROM APPOINTMENT WHERE appointment_date = ?1 AND start_time = ?2 AND employee_id = ?3", nativeQuery = true)
    List<Appointment> getAppointmentByDateAndEmployee(LocalDate appointmentDate, LocalTime startTime, int employeeId);

}

服務層

package com.jb.app.services;

import com.jb.app.beans.Appointment;
import com.jb.app.beans.Employee;
import com.jb.app.repos.AppointmentRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;

import java.time.LocalDate;
import java.time.LocalTime;
import java.util.List;


@Service
@RequiredArgsConstructor
public class AppointmentServiceImpl implements AppointmentService{
    
    private final AppointmentRepository appointmentRepository;
    
    @Override
    public List<Appointment> getAppointmentByDateAndEmployee(LocalDate appointmentDate, LocalTime startTime, Employee e) {
        return appointmentRepository.getAppointmentByDateAndEmployee(appointmentDate,startTime,e.getId());
    }
}