hibernate - 在没有级联父级的情况下保持 JPA ManyToOne 单向关系-6ren

hibernate - 在没有级联父级的情况下保持 JPA ManyToOne 单向关系

转载作者：行者123 更新时间：2023-12-05 07:58:40

尝试在 JPA 中保留 ManyToOne 单向关系，但将滴流保存到父对象。
情况是这样的。有 2 个实体 AccountUser 和 Role，许多用户具有相同的角色。我已经在系统中创建了角色，现在想通过创建或更新实体操作将这些角色分配给用户。当我在 AccountUser 上调用 save&Flush 方法时，JPA/hibernate 也会级联角色并返回以下异常:

Jun 03, 2014 1:25:31 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [application] in context with path [/application] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: org.hibernate.TransientPropertyValueException: object references an unsaved transient instance - save the transient instance before flushing: com.company.domain.AccountUser.role -> com.company.domain.Role; nested exception is java.lang.IllegalStateException: org.hibernate.TransientPropertyValueException: object references an unsaved transient instance - save the transient instance before flushing: com.company.domain.AccountUser.role -> com.company.domain.Role] with root cause
org.hibernate.TransientPropertyValueException: object references an unsaved transient instance - save the transient instance before flushing: com.company.application.domain.AccountUser.role -> com.company.application.domain.Role
    at org.hibernate.engine.spi.CascadingAction$8.noCascade(CascadingAction.java:380)
    at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:175)
    at org.hibernate.event.internal.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:165)
    at org.hibernate.event.internal.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:156)
    at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:89)
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:55)
    at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1159)
    at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:404)
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175)
    at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:75)
    at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:515)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:757)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:726)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:478)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:272)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.jpa.repository.support.LockModeRepositoryPostProcessor$LockModePopulatingMethodIntercceptor.invoke(LockModeRepositoryPostProcessor.java:84)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy61.findOne(Unknown Source)
    at com.company.application.service.AccountUserServiceImpl.update(AccountUserServiceImpl.java:83)
    at com.company.application.controller.AccountUserController.update(AccountUserController.java:69)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
    at org.springframework.web.servlet.FrameworkServlet.doPut(FrameworkServlet.java:874)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:649)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:177)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at com.company.application.controller.misc.CorsFilter.doFilterInternal(CorsFilter.java:22)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.access.ExceptionTranslationFilter.doF13:25:31.713 [http-bio-8080-exec-1] DEBUG o.s.web.servlet.DispatcherServlet - DispatcherServlet with name 'clearbox' processing PUT request for [/clearbox/uncaughtException]
13:25:31.713 [http-bio-8080-exec-1] DEBUG o.s.w.s.m.m.a.RequestMappingHandlerMapping - Looking up handler method for path /uncaughtException
ilter(ExceptionTranslationFilter.java:113)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

我不想保留除 AccountUser 以外的任何内容。由于我没有在关系注释中设置 cascade 属性，我的理解是 jpa 不应该级联任何东西。请让我知道我做错了什么？

环境:Spring 4.0.3，spring-data-jpa 1.2.0，Hibernate 4.2.10，jackson 2.3.3，lombok 1.12.6，

帐户实体(已编辑)

public class Account {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;
    private String address;
    private String city;
    private String province;
    private String postalCode;

    @Version
    private Integer version;
}

用户实体(已编辑)

public class AccountUser {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String firstName;
    private String lastName;

    @ManyToOne
    @JoinColumn(name="accountId")
    private Account account;

    @ManyToOne
    @JoinColumn(name="roleId")
    private Role role;

    @Version
    private Integer version;
}

角色实体(已编辑)

public class Role {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;

    @ManyToOne
    @JoinColumn(name="accountId")
    private Account account;

    @Version
    private Integer version;
}

更新服务

@Service
@Transactional
public class AccountUserServiceImpl implements AccountUserService { 

    @Autowired AccountUserRepository accountUserRepository;
    @Autowired RoleRepository roleRepository;

    public void delete(AccountUser accountUser) {
        accountUserRepository.delete(accountUser);
    }

    public void save(AccountUser accountUser) {
        accountUserRepository.save(accountUser);
    }

    public void update() {
        AccountUser accountUser = accountUserRepository.findOne(1L);
        Role role = roleRepository.findOne(2L);
        accountUser.setRole(role);
        //accountUserRepository.saveAndFlush(accountUser);
    }
}

maven 依赖项:

1.7.2 1.7 UTF-8编码 1.7.5 4.0.3.发布 3.2.3.发布 spring-maven-发布 Spring Maven 发布存储库 http://maven.springframework.org/release spring-maven-里程碑 Spring Maven 里程碑存储库 http://maven.springframework.org/milestone

spring-maven-发布 Spring Maven 发布存储库 http://maven.springframework.org/release spring-maven-里程碑 Spring Maven 里程碑存储库 http://maven.springframework.org/milestone

联机联机 4.11 测试 log4j log4j 1.2.17 org.slf4j slf4j-api ${slf4j.version} org.slf4j jcl-over-slf4j ${slf4j.version} org.slf4j slf4j-log4j12 ${slf4j.version} 组织.aspectj aspectjrt ${aspectj.version} 组织.aspectj aspectjweaver ${aspectj.version} --> javax.servlet servlet-api 2.5 假如

<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-lang3</artifactId>
    <version>3.1</version>
</dependency>
<!-- Spring dependencies -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>${spring.version}</version>
    <exclusions>
        <exclusion>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>${spring.version}</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>${spring.version}</version>
</dependency>

<!-- spring security -->
<dependency>  
    <groupId>org.springframework.security</groupId>  
    <artifactId>spring-security-core</artifactId>  
    <version>${spring.security.version}</version>  
</dependency>  
<dependency>  
    <groupId>org.springframework.security</groupId>  
    <artifactId>spring-security-web</artifactId>  
    <version>${spring.security.version}</version>  
</dependency>  
<dependency>  
    <groupId>org.springframework.security</groupId>  
    <artifactId>spring-security-config</artifactId>  
    <version>${spring.security.version}</version>  
</dependency>         

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.18</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>4.2.10.Final</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>4.2.10.Final</version>
    <exclusions>
        <exclusion>
            <groupId>cglib</groupId>
            <artifactId>cglib</artifactId>
        </exclusion>
        <exclusion>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.hibernate.javax.persistence</groupId>
    <artifactId>hibernate-jpa-2.0-api</artifactId>
    <version>1.0.1.Final</version>
</dependency>
<dependency>
    <groupId>commons-collections</groupId>
    <artifactId>commons-collections</artifactId>
    <version>3.2.1</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>4.3.1.Final</version>
</dependency>
<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>1.0.0.GA</version>
</dependency>
<dependency>
    <groupId>javax.transaction</groupId>
    <artifactId>jta</artifactId>
    <version>1.1</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>commons-pool</groupId>
    <artifactId>commons-pool</artifactId>
    <version>1.5.6</version>
</dependency>
<dependency>
    <groupId>commons-dbcp</groupId>
    <artifactId>commons-dbcp</artifactId>
    <version>1.4</version>
    <exclusions>
        <exclusion>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
        </exclusion>
        <exclusion>
            <groupId>xml-apis</groupId>
            <artifactId>xml-apis</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-jpa</artifactId>
        <version>1.2.0.RELEASE</version>
    </dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework.webflow</groupId>
    <artifactId>spring-js-resources</artifactId>
    <version>2.2.1.RELEASE</version>
</dependency>
<dependency>
    <groupId>commons-digester</groupId>
    <artifactId>commons-digester</artifactId>
    <version>2.1</version>
    <exclusions>
        <exclusion>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>1.2.2</version>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp.jstl</groupId>
    <artifactId>jstl-api</artifactId>
    <version>1.2</version>
</dependency>
<dependency>
    <groupId>org.glassfish.web</groupId>
    <artifactId>jstl-impl</artifactId>
    <version>1.2</version>
</dependency>
<dependency>
    <groupId>javax.el</groupId>
    <artifactId>el-api</artifactId>
    <version>2.2</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>joda-time</groupId>
    <artifactId>joda-time</artifactId>
    <version>1.6</version>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.1</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>commons-codec</groupId>
    <artifactId>commons-codec</artifactId>
    <version>1.5</version>
</dependency>
<dependency>
    <groupId>org.apache.tiles</groupId>
    <artifactId>tiles-jsp</artifactId>
    <version>2.2.2</version>
</dependency>

<!-- lomboc -->        
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.12.6</version>
    <scope>provided</scope>
</dependency>  

<!-- Joda time -->
<dependency>
    <groupId>joda-time</groupId>
    <artifactId>joda-time</artifactId>
    <version>2.0</version>
</dependency>                    

<dependency>
    <groupId>org.json</groupId>
    <artifactId>json</artifactId>
    <version>20140107</version>
</dependency>

<dependency>
    <groupId>org.jadira.usertype</groupId>
    <artifactId>usertype.spi</artifactId>
    <version>3.1.0.GA</version>
</dependency>   

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.3.3</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.3.3</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.3.3</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.datatype</groupId>
  <artifactId>jackson-datatype-hibernate4</artifactId>
  <version>2.2.3</version>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-rest</artifactId>
    <version>1.0.0.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpcore</artifactId>
    <version>4.3.1</version>
</dependency>

<!-- Dozer -->      
<dependency>
    <groupId>net.sf.dozer</groupId>
    <artifactId>dozer</artifactId>
    <version>5.4.0</version>
</dependency>

<!-- send grid -->
<dependency>
  <groupId>com.github.kevinsawicki</groupId>
  <artifactId>http-request</artifactId>
  <version>5.6</version>
</dependency>
<dependency>
  <groupId>org.json</groupId>
  <artifactId>org.json</artifactId>
  <version>chargebee-1.0</version>
</dependency>       

<!-- swagger4spring-web -->
<dependency>
    <groupId>com.knappsack</groupId>
    <artifactId>swagger4spring-web</artifactId>
    <version>0.3.3</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-integration</artifactId>
    <version>1.0.0.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-integration</artifactId>
    <version>1.0.0.RELEASE</version>
</dependency>

事务管理器(已编辑)

   <bean class="org.springframework.orm.jpa.JpaTransactionManager" id="transactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    </bean>

    <tx:annotation-driven mode="aspectj" transaction-manager="transactionManager"/>

    <bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory">
        <property name="persistenceUnitName" value="persistenceUnit"/>
        <property name="dataSource" ref="dataSource"/>
    </bean>

最佳答案

这个问题一般发生在Hibernate认为保存一个对象的时候

它需要保存一个与您正在保存的对象关联的对象。

因此，为了避免级联，我们需要级联类型为 NONE。

这里的技巧是确保引用对象中的ID和VERSION

被设置为 Hibernate 不认为被引用的对象是一个

需要保存的新对象。

关于hibernate - 在没有级联父级的情况下保持 JPA ManyToOne 单向关系，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24022377/

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什么是 hibernate 和n- hibernate ？我可以在 Visual Studio 2008 中使用它进行 C# Web 应用程序开发吗？请给我建议...我是 asp.net Web 应用
hibernate - grails/hibernate:在作业中获取org.hibernate.StaleStateException
我有一个不系统地发生的异常(exception)。我试图通过在每次迭代中刷新和清理 session 来解决此问题，但没有成功。 [quartzScheduler_Worker-7] ERROR jd
hibernate - hibernate 实体中IP地址的最佳类型？
使用 Hibernate 在数据库中存储 IP 地址的最佳类型是什么？我虽然是 Byte[] 或 String，但有没有更好的方法，或者你用什么？ @Column(name = "range_fr
hibernate - Hibernate @Formula中TRIM函数的参数数量错误
我正在尝试制定一个公式来选择用户个人资料的用户友好名称。它选择名字 + ' ' + 姓氏如果其中至少有一个不为空且不为空(包含非空白字符)，否则选择短名称 (条件相同)，最后，如果短名称为空或
hibernate - 鉴别器列映射为实体 Hibernate
在hibernate中，是否可以将鉴别器作为一个实体？例如，如果我将 Department 作为基类，将 AdminDepartment 和 ProcessingDepartment 作为子类。 De
hibernate - hibernate 投影列表
我只想从表中获取一些列值。因此，我已经使用投影来实现这一目标。该代码有效，但我认为它无效。我的问题是当我使用ProjectionsList并将标准条件列表设置为ArrayList时-Bulletin
hibernate - hibernate 缓存保存了什么？
你好: 我对 hibernate 缓存缓存的内容感到困惑。从文档中，我知道 hibernate 中有缓存类型。一级 :交易级别。似乎要被 session 持久化的实体被缓存在这里。二级缓存 :
hibernate - 数据库触发器和 hibernate
我遇到了一个情况: save或update hibernate 的目标表中的某些数据在目标表上有一个触发器，该触发器将在目标表的insert或update操作之前执行由 hibernate 将此记
hibernate - Hibernate JPA缓存
我有一个名为 Master_Info_tbl 的表。它是一个查询表: 这是该表的代码: @Entity @Table(name="MASTER_INFO_T") public class Code
hibernate - Hibernate 中的日期字面量
我想知道如何在 Hibernate 查询语言中使用日期文字。我在我的 JPA 项目中做了如下操作(作为 Eclipselink 提供者)并且它工作正常。 SELECT m FROM Me m WHER
hibernate - Hibernate 中的关系所有者是什么意思？
@Entity public class Troop { @OneToMany(mappedBy="troop") public Set getSoldiers() { ...
hibernate - 查询以删除表中的所有行 hibernate
我正在尝试使用 hibernate 查询删除表 'user_role' 中的所有行。但每次我都会出错。有人可以帮我吗。 DaoImpl @Override public void deleteAll(
hibernate - OSGi + hibernate
不是将数据库操作分散在四个 (osgi) 包中，而是在那里做略有不同的事情。我想创建一个负责所有持久性问题的(简单的)OSGi 包。我觉得这并不像听起来那么简单，因为“每个包都有独特的类加载器”。因
hibernate - hibernate 生成器如何增量句柄删除
这就是我使用生成器的方式: private Integer id; 我看到的行为是: 创建第一个对象 hibernate 分配 id = 1 删除该对象关闭服务
hibernate - hibernate 中的实体和值类型
对象级别的实体和值类型有什么区别。我知道实体将有一个 id 但值不会，但为什么我们需要不同的方法来映射实体与值类型？这样做是为了让hibernate可以对值类型应用任何优化吗？最佳答案一个实体已
hibernate - Hibernate 连接表的标准
我正在使用 HibernateTemplate.findByCriteria 方法进行一些查询。现在我想在标准上创建一些 SQL 限制，比如 criteria.add(Restrictions.sql
hibernate - 从表中全选 hibernate
所以我有以下代码: Query query = session.createQuery("from Weather"); List list = query.list();
hibernate - 查看与 hibernate
如何使用Hibernate映射具有多个实体的 View ？问候，混沌最佳答案请参见Hibernate文档中第5.1.3节“类”，紧接在“Id”节之前: There is no differen
hibernate - 为什么需要传统的 Hibernate？
据我所知，Hibernate 有两种类型的实现 JPA的实现(2)(@Entity，@Table注解) 扩展到旧的(传统的) hibernate (没有 JPA)，使用 HSQL 查询，没有注释如果
hibernate - Hibernate 中的多图
我需要一个将条目存储为键值对的集合(因此我可以通过键查找值)，但我需要一个允许多个值使用 hibernate 共享同一个键的集合最佳答案一个键具有多个值的映射称为多映射 - 在 Apache 公共

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hibernate - 在没有级联父级的情况下保持 JPA ManyToOne 单向关系