JPA 查询错误创建 bean

Question

当我将此查询添加到我的房间存储库时，我在启动 Spring 应用程序时开始收到错误消息。 如果我对查询进行评论，错误就会消失并且应用程序会正确启动。

public interface RoomRepository extends JpaRepository<Room, Long> {

    @Query("select Room r from Room join r.bookings b where not ((b.beginDate >= :initDate And b.beginDate <= :endtDate) or (b.beginDate >= :initDate And b.endDate <= :endDate) or (b.beginDate <= :initDate and b.endDate >= :endDate) and b.approved = true and r.roomType = :roomType)")
    List<Room> findWithDates(@Param("initDate") Date initDate, @Param("endDate") Date endDate, @Param("roomType") long roomType);
}

错误：

Wrapped by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.boot.autoconfigure.web.HttpMessageConverters org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration$WebMvcAutoConfigurationAdapter.messageConverters; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private final java.util.List org.springframework.boot.autoconfigure.web.HttpMessageConvertersAutoConfiguration.converters; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'mappingJackson2HttpMessageConverter' defined in class path resource [org/springframework/boot/autoconfigure/web/JacksonHttpMessageConvertersConfiguration$MappingJackson2HttpMessageConverterConfiguration.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.fasterxml.jackson.databind.ObjectMapper]: : Error creating bean with name 'objectMapper' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.fasterxml.jackson.databind.ObjectMapper]: Factory method 'objectMapper' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Factory method 'config' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'resourceMappings' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.mapping.ResourceMappings]: Factory method 'resourceMappings' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repositories' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.repository.support.Repositories]: Factory method 'repositories' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'roomRepository': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property findWithDates found for type Room!; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'objectMapper' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.fasterxml.jackson.databind.ObjectMapper]: Factory method 'objectMapper' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'config' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.config.RepositoryRestConfiguration]: Factory method 'config' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'resourceMappings' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.rest.core.mapping.ResourceMappings]: Factory method 'resourceMappings' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repositories' defined in class path resource [org/springframework/boot/autoconfigure/data/rest/SpringBootRepositoryRestMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.repository.support.Repositories]: Factory method 'repositories' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'roomRepository': Invocation of init method failed; nested exception is org.springframework.data.mapping.PropertyReferenceException: No property findWithDates found for type Room!

房间等级：

@Entity
public class Room {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    private String name;

    @ManyToOne
    @JoinColumn( name="roomType_id" )
    private RoomType roomType;

    @OneToMany(fetch = FetchType.LAZY, cascade=CascadeType.ALL, mappedBy="room", orphanRemoval = true)
    private Collection<Booking> bookings = new ArrayList<Booking>();

}

Answer 1

您的方法名称与 Spring 自动实现的方法冲突（在您的情况下，Spring 查找名为“initDateEndDateRoomType”的字段并失败。

Spring Data 存储库基础结构中内置的查询构建器机制对于构建对存储库实体的约束查询非常有用。 该机制从方法中去除前缀​​ find...By、read...By、query...By、count...By 和 get...By，并开始解析它的其余部分。

但是，如果您还扩展JpaRepository<Room, Long> ，它应该可以工作，但我尚未验证。

Answer 2

@Query(value = "select Room r from Room join r.bookings b where not ((b.beginDate >= :initDate And b.beginDate <= :endtDate) or (b.beginDate >= :initDate And b.endDate <= :endDate) or (b.beginDate <= :initDate and b.endDate >= :endDate) and b.approved = true and r.roomType = :roomType)", nativeQuery=true)

这有效，查询注释也是错误的。