我在設計CrudRepository中的查詢時遇到了一些麻煩。CrudRepository:由多個相關實體查找
我有兩個實體,CourseOffering和系(僅顯示相關的代碼):
CourseOffering.java:
public class CourseOffering implements Serializable
{
private Department department;
@ManyToOne(fetch = FetchType.LAZY, optional = true)
@JoinColumn(name = "DepartmentId", nullable = true)
@JsonProperty
public Department getDepartment()
{
return this.department;
}
public void setDepartment(Department department)
{
this.department = department;
}
}
Department.java:
public class Department implements Serializable
{
private Set<CourseOffering> courses;
@OneToMany(fetch = FetchType.LAZY, mappedBy = "department")
public Set<CourseOffering> getCourses() {
return this.courses;
}
public void setCourses(Set<CourseOffering> courses) {
this.courses = courses;
}
}
和有關CrudRepository :
CourseOfferingRepository.java:
import java.util.List;
import edu.ucdavis.dss.dw.entities.CourseOffering;
import org.springframework.data.repository.CrudRepository;
public interface CourseOfferingRepository extends CrudRepository<CourseOffering, Long>
{
CourseOffering getOneByTermIdAndNumberAndDepartmentId(long termId, String number,
long departmentId);
List<CourseOffering> findByDepartmentCode(String deptCode);
//List<CourseOffering> findAllByDepartmentCode(String deptCodes);
List<CourseOffering> findByTermCode(String termCode);
}
CourseOfferingRepository中未註釋的三個函數按預期工作。我試圖讓第四個工作。
我想要做的是能夠返回所有CourseOfferings,其中部門代碼是許多部門代碼之一。請注意,CourseOffering表本身只保存一個department_id整數,該整數引用部門表中的ID,其中存儲了實際的dept代碼。
我該如何解決讓CrudRepository功能正常工作的評論?換句話說,如何製作複數版本的「List findByDepartmentCode(String deptCode);」?
在此先感謝您提供的任何建議。
是否'findByDeptCodeIn(收藏 deptCodes)'做你想要什麼? –
geoand
是的,謝謝!最後還不知道「In」位。 – Christopher
我添加了評論作爲答案:) – geoand