春季表关系问题
我有两个实体Product和Image，图像有一个Product外键。
当我尝试运行代码时，出现以下错误
org.springframework.beans.factory.UnsatisfiedDependencyException：创建名为'mainController'的bean时出错：通过字段'imageRepository'表示的不满意的依赖关系; 嵌套异常是org.springframework.beans.factory.BeanCreationException：创建名为'imageRepository'的bean时出错：init方法的调用失败; 嵌套异常是org.springframework.data.mapping.PropertyReferenceException：找不到类型为Image的属性产品！ 在org.springframework.beans的org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:588）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE]。 factory.annotation.InjectionMetadata.inject（InjectionMetadata.java:88）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor （AbstractAutowireCapableBeanFactory.java:1264）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:553）〜[spring-beans-4.3.11.RELEASE.jar ：4.3.11.RELEASE] at org.springframework.beans.factory.support.AbstractA 在org.springframework.beans.factory.support.AbstractBeanFactory中添加utowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:483）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] $ 1.getObject（AbstractBeanFactory.java： 306）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）〜[spring-beans-4.3 .11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:302）〜[spring-beans-4.3.11.RELEASE.jar：4.3。 11.RELEASE]在org.springframework上的org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:197）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE]。 beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:761）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.context.support.Abst ractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:867）〜[spring-context-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:543）〜 [spring-context-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh（EmbeddedWebApplicationContext.java:122）〜[spring-boot-1.5.7。在org.springframework上的org.springframework.boot.SpringApplication.refresh（SpringApplication.java:693）[spring-boot-1.5.7.RELEASE.jar：1.5.7.RELEASE]上的RELEASE.jar：1.5.7.RELEASE] .boot.SpringApplication.refreshContext（SpringApplication.java:360）[spring-boot-1.5.7.RELEASE.jar：1.5.7.RELEASE] at org.springframework.boot.SpringApplication.run（SpringApplication.java:303）[ spring-boot-1.5.7.RELEASE.jar：1.5.7.RELEASE]在org.springframework.boot.SpringApplication.run（SpringApplication.java:1118）[spring-boot-1.5.7.RELEASE.jar：1.5。 7.RELEASE]在org.spri ngframework.boot.SpringApplication.run（SpringApplication.java:1107）[spring-boot-1.5.7.RELEASE.jar：1.5.7.RELEASE] at model.Application.main（Application.java:10）[classes /： na]引起：org.springframework.beans.factory.BeanCreationException：创建名为'imageRepository'的bean时出错：init方法的调用失败; 嵌套异常是org.springframework.data.mapping.PropertyReferenceException：找不到类型为Image的属性产品！ 在org.springframework.beans.factory的org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1628）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE]。 （AbstractAutowireCapableBeanFactory.java:555）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java ：483）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:306）〜[spring-beans -4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）〜[spring-beans-4.3.11.RELEASE.jar： 4.3.11.RELEASE]在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:30 2）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:202）〜[spring-beans-4.3 .11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate（DependencyDescriptor.java:208）〜[spring-beans-4.3.11.RELEASE.jar：4.3。 11.RELEASE]在org.springframework上的org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:1138）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE]。 beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:1066）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement .inject（AutowiredAnnotationBeanPostProcessor.java:585）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] ...省略了19个常见帧由...引起：org.springframework.da ta.mapping.PropertyReferenceException：未找到类型为Image的属性产品！ （org.springframework.data.mapping.PropertyPath。（PropertyPath.java:77）〜[spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data.mapping.PropertyPath.create（PropertyPath .java：329）〜[spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data.mapping.PropertyPath.create（PropertyPath.java:309）〜[spring-data-commons- 1.13.7.RELEASE.jar：na] at org.springframework.data.mapping.PropertyPath.from（PropertyPath.java:272）〜[spring-data-commons-1.13.7.RELEASE.jar：na] at org。 springframework.data.mapping.PropertyPath.from（PropertyPath.java:243）〜[spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data.repository.query.parser.Part。（ Part.java:76）〜[spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data.repository.query.parser.PartTree $ OrPart。（PartTree.java:247）〜[ spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data.repository.query.parser.PartTree $ Predicate.buildTree（PartTree.java:398）〜[spring-data-commons-1.13 .7.RELEASE.jar： na] at org.springframework.data.repository.query.parser.PartTree $ Predicate。（PartTree.java:378）〜[spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data .repository.query.parser.PartTree。（PartTree.java:89）〜[spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data.jpa.repository.query.PartTreeJpaQuery。（ PartTreeJpaQuery.java:64）〜[spring-data-jpa-1.11.7.RELEASE.jar：na] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy $ CreateQueryLookupStrategy.resolveQuery（JpaQueryLookupStrategy.java:103）〜在[spring-data-jpa-1.11.7.RELEASE.jar： 1.11.7.RELEASE.jar：na] at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy $ AbstractQueryLookupStrategy.resolveQuery（JpaQueryLookupStrategy.java:77）〜[spring-data-jpa-1.11.7.RELEASE.jar ：na]在org.springframework.data.reposit ory.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor。（RepositoryFactorySupport.java:436）〜[spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data.repository.core.support.RepositoryFactorySupport。 getRepository（RepositoryFactorySupport.java:221）〜[spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn（RepositoryFactoryBeanSupport.java:277）〜 [spring-data-commons-1.13.7.RELEASE.jar：na] at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet（RepositoryFactoryBeanSupport.java:263）〜[spring-data-commons-1.13。 7.RELEASE.jar：na] at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet（JpaRepositoryFactoryBean.java:101）〜[spring-data-jpa-1.11.7.RELEASE.jar：na] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:168 7）〜[spring-beans-4.3.11.RELEASE.jar：4.3.11.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1624）〜[spring-beans-4.3 .11.RELEASE.jar：4.3.11.RELEASE] ...省略了29个常用框架
产品实体
@Entity
@Table(name = "product")
public class Product {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
private String name;
private String description;
private Integer parent_product_id;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Integer getParent_product_id() {
return parent_product_id;
}
@OneToMany
@JoinColumn(name = "product_id")
public void setParent_product_id(Integer parent_product_id) {
this.parent_product_id = parent_product_id;
}
}
图像实体
@Entity
public class Image {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
private String type;
@ManyToOne
private Product product_id;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public Product getParent_product_id() {
return product_id;
}
public void setProduct_id(Product product_id) {
this.product_id = product_id;
}
}
我的ImageRepository
package model;
import org.springframework.data.repository.CrudRepository;
import java.util.List;
// This will be AUTO IMPLEMENTED by Spring into a Bean called userRepository
// CRUD refers Create, Read, Update, Delete
public interface ImageRepository extends CrudRepository<Image, Long> {
List<Image> findByProduct_id(String id);
}
谢谢你们的帮助！
您的资料库应该是：
public interface ImageRepository extends CrudRepository<Image, Long> {
List<Image> findByProductId(Integer id);
}
您的Product实体应该是：
@Entity
@Table(name = "product")
public class Product {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
private String name;
private String description;
@Transient
private Integer parentId;
@ManyToOne
@JoinColumn(name="parent_id")
private Product parentProduct;
//getters/setters
}
你的Image实体应该是：
@Entity
@Table(name = "image")
public class Image {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
private String type;
@ManyToOne
@JoinColumn(name = "product_id")
private Product product;
//getters/setters
}
请将product_id的名称更改为product ，并将字符串类型从存储库更改为Product！ 另请试试这个查询：
@Query("select * from Image image where image.product=:product")
List<Image> findByProduct(@Param("product") Product product);