出现 InvalidDataAccessApiUsageException：使用 ExampleMatcher 时，根 %s 中的路径“%s”不得跨越循环属性引用

Question

客户型号：

@Entity
public class Client {
    @Id
    private Integer id;

    @OneToOne(mappedBy = "client", fetch = FetchType.LAZY, cascade = {CascadeType.MERGE, CascadeType.REMOVE})
    private ClientLegalTerm clientLegalTerm;

    ...//Getters and Setters
}

客户法律条款模型：

@Entity
public class ClientLegalTerm {
    @Id
    private Integer id;

    @OneToOne(optional = false, fetch = FetchType.LAZY)
    @JoinColumn(foreignKey = @ForeignKey(name = "FK_client_legal_term_client_id"))
    private Client client;

    ...//Getters and Setters
}

我的新实体模型：

@Entity
public class MyNewEntity {
    @Id
    private Integer id;

    @ManyToOne(fetch = FetchType.LAZY, optional = false)
    private Client client;

    ...//Getters and Setters

我正在使用QueryByExampleJpaRepository来管理MyNewEntity，并且我想使用 QueryByExample 从存储库中获取实例。

    ExampleMatcher matcher = ExampleMatcher.matching()
           .withMatcher("client.id", match -> match.exact());
    Example<MyNewEntity> example = Example.of(new MyNewEntity(client), matcher);

    Optional<MyNewEntity> optionalEntity = investorClosedEndTransactionRepository.findOne(example);

findOne()但如果填充了 ClientLegalTerm， 我会在通话中遇到异常。org.springframework.dao.InvalidDataAccessApiUsageException: Path 'client.legalTerm.client' from root MyNewEntity must not span a cyclic property reference! 我知道这是因为客户端内部存在对同一客户端的循环引用，但因为 ClientLegalTerm 是一对一表，这就是我正在处理的模型。有没有办法绕过这个异常？

也许有其他方法可以仅通过 ID 来匹配客户端？

完整的堆栈跟踪：

2020-11-04 12:28:17,588 ERROR [com.krfs.web.handler.ControllerExceptionHandler handleUncaughtException] - 127.0.0.1 8de1b613-6e6d-4d00-82b3-773934d9f09d An unhandled exception has occurred
org.springframework.dao.InvalidDataAccessApiUsageException: Path 'client.legalTerm.client' from root InvestorClosedEndTransaction must not span a cyclic property reference!
[{ com.alpsinc.live.loader.InvestorClosedEndTransaction@c0c64c52 }] -client-> [{ com.krfs.model.Client@86d }] -legalTerm-> [{ com.krfs.model.ClientLegalTerm@86d }] -client-> [{ com.krfs.model.Client@86d }]
        at org.springframework.data.jpa.convert.QueryByExamplePredicateBuilder.getPredicates(QueryByExamplePredicateBuilder.java:163)
        at org.springframework.data.jpa.convert.QueryByExamplePredicateBuilder.getPredicates(QueryByExamplePredicateBuilder.java:167)
        at org.springframework.data.jpa.convert.QueryByExamplePredicateBuilder.getPredicates(QueryByExamplePredicateBuilder.java:167)
        at org.springframework.data.jpa.convert.QueryByExamplePredicateBuilder.getPredicate(QueryByExamplePredicateBuilder.java:102)
        at org.springframework.data.jpa.repository.support.SimpleJpaRepository$ExampleSpecification.toPredicate(SimpleJpaRepository.java:886)
        at org.springframework.data.jpa.repository.support.SimpleJpaRepository.applySpecificationToCriteria(SimpleJpaRepository.java:762)
        at org.springframework.data.jpa.repository.support.SimpleJpaRepository.getQuery(SimpleJpaRepository.java:693)
        at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findOne(SimpleJpaRepository.java:466)
        at sun.reflect.GeneratedMethodAccessor6222.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:45005)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:371)
        at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:204)
        at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:657)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:621)
        at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:605)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:80)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:367)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:118)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:178)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
        at com.sun.proxy.$Proxy2110.findOne(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor6220.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:45005)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.zeroturnaround.javarebel.integration.util.ReloadingProxyFactory$ReloadingMethodHandler.invoke(SourceFile:74)
        at com.sun.proxy.$Proxy2110.findOne(Unknown Source)
        at com.alpsinc.live.loader.InvestorClosedEndTransactionService.validateEntityStatus(InvestorClosedEndTransactionService.java:78)

Answer 1

我有同样的错误：

\n

org.springframework.dao.InvalidDataAccessApiUsageException: Path 'company.taxData.company' from root User must not span a cyclic property reference!\n

\n

就我而言，是因为我有这些模型：

\n

@Entity\n@Table(name = "users")\npublic class User extends Item\n{\n    @NotBlank\n    @Email\n    private String email;\n\n    @ManyToOne(fetch = FetchType.EAGER)\n    @JoinColumn(nullable = false)\n    @NotNull\n    private Company company;\n}\n

\n

@Entity\npublic class Company extends Item\n{\n    @OneToMany(\n            cascade = CascadeType.ALL,\n            fetch = FetchType.EAGER,\n            orphanRemoval = true)\n    private Set<User> users;\n\n    @OneToMany(mappedBy = "company",\n            cascade = CascadeType.ALL,\n            fetch = FetchType.EAGER,\n            orphanRemoval = true)\n    private Set<Address> addresses;\n}\n

\n

@Entity\npublic class Address extends Item\n{\n    @ManyToOne(fetch = FetchType.EAGER)\n    @JoinColumn(nullable = false)\n    @NotNull\n    private Company company;\n}\n

\n

我试图通过这种方式吸引用户：

\n

public Optional<User> findOneByEmailAndCompany(final String email, final Company company)\n{\n    final User user = new User();\n    user.setCompany(company);\n    user.setEmail(email);\n    return userRepository.findOne(Example.of(user));\n}\n

\n

JPA类QueryByExamplePredicateBuilder尝试以反射方式解析属性和类，但在spansCycle函数中检查identityHex实际的value和identityHex的parent是否相同并抛出InvalidDataAccessApiUsageException避免无限递归\xc3\xb3n：

\n

boolean spansCycle() {\n\n    if (value == null) {\n        return false;\n    }\n\n    String identityHex = ObjectUtils.getIdentityHexString(value);\n    PathNode current = parent;\n\n    while (current != null) {\n\n        if (current.value != null && ObjectUtils.getIdentityHexString(current.value).equals(identityHex)) {\n            return true;\n        }\n        current = current.parent;\n    }\n\nreturn false;\n}\n

\n

我通过在 UserRepository 中创建自定义查询来解决公司和用户之间的内部联接：

\n

@Repository\npublic interface UserRepository extends JpaRepository<User, Long>\n{\n    @Query("SELECT u FROM User u INNER JOIN u.company uc WHERE uc.id = :companyId AND u.email = :userEmail")\n    public Optional<User> findByEmailAndCompanyId(String userEmail, Long companyId);\n}\n

\n