当前使用版本(必填,否则不予处理)
3.4.3
该问题是如何引起的？(确定最新版也有问题再提!!!)
在整合sharding-jdbc时，以创建时间create_tinme作为分片条件。 若更新时带有create_time分片条件会导致执行失败，所以想在更新时去除create_time，具体是通过 自动填充 进行操作。
重现步骤(如果有就写完整)
想在更新时去除create_time，具体是通过 自动填充 进行操作。
@Configuration
public class MybatisPlusConfig implements MetaObjectHandler {
/***
* mybatis-plus 自动填充-新增时触发
*/
@Override
public void insertFill(MetaObject metaObject) {
}
/***
* mybatis-plus 自动填充-修改时触发
*/
@Override
public void updateFill(MetaObject metaObject) {
//todo 因为这里以create_time作为分片条件，所以更新时不能修改，这里操作就是设为null
if (metaObject.hasSetter("createTime")) {
metaObject.setValue("createTime", null);
}
}
}
报错信息
实际执行的SQL还是有create_time条件
SQL: UPDATE t_goods SET unit=?, brief=?, retail_price=?, create_time=?, create_name=?, update_time=?, update_name=? WHERE id=? AND deleted=0
期待结果
SQL: UPDATE t_goods SET unit=?, brief=?, retail_price=?, create_name=?, update_time=?, update_name=? WHERE id=? AND deleted=0
完整错误信息
2021-11-28 21:27:06.173 ERROR 16256 --- [nio-7878-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
### Error updating database. Cause: java.lang.NullPointerException
### The error may exist in com/example/mapper/GoodsMapper.java (best guess)
### The error may involve com.example.mapper.GoodsMapper.updateById-Inline
### The error occurred while setting parameters
### SQL: UPDATE t_goods SET unit=?, brief=?, retail_price=?, create_time=?, create_name=?, update_time=?, update_name=? WHERE id=? AND deleted=0
### Cause: java.lang.NullPointerException] with root cause
java.lang.NullPointerException: null
at java.util.Objects.requireNonNull(Objects.java:203) ~[na:1.8.0_292]
at java.util.Optional.<init>(Optional.java:96) ~[na:1.8.0_292]
at java.util.Optional.of(Optional.java:108) ~[na:1.8.0_292]
at org.apache.shardingsphere.sharding.route.engine.validator.dml.impl.ShardingUpdateStatementValidator.getShardingColumnSetAssignmentValue(ShardingUpdateStatementValidator.java:81) ~[shardingsphere-sharding-core-5.0.0.jar:5.0.0]
at org.apache.shardingsphere.sharding.route.engine.validator.dml.impl.ShardingUpdateStatementValidator.preValidate(ShardingUpdateStatementValidator.java:55) ~[shardingsphere-sharding-core-5.0.0.jar:5.0.0]
at org.apache.shardingsphere.sharding.route.engine.ShardingSQLRouter.lambda$createRouteContext$0(ShardingSQLRouter.java:52) ~[shardingsphere-sharding-core-5.0.0.jar:5.0.0]
at java.util.Optional.ifPresent(Optional.java:159) ~[na:1.8.0_292]
at org.apache.shardingsphere.sharding.route.engine.ShardingSQLRouter.createRouteContext(ShardingSQLRouter.java:52) ~[shardingsphere-sharding-core-5.0.0.jar:5.0.0]
at org.apache.shardingsphere.sharding.route.engine.ShardingSQLRouter.createRouteContext(ShardingSQLRouter.java:44) ~[shardingsphere-sharding-core-5.0.0.jar:5.0.0]
at org.apache.shardingsphere.infra.route.engine.impl.PartialSQLRouteExecutor.route(PartialSQLRouteExecutor.java:62) ~[shardingsphere-infra-route-5.0.0.jar:5.0.0]
at org.apache.shardingsphere.infra.route.engine.SQLRouteEngine.route(SQLRouteEngine.java:53) ~[shardingsphere-infra-route-5.0.0.jar:5.0.0]
at org.apache.shardingsphere.infra.context.kernel.KernelProcessor.route(KernelProcessor.java:54) ~[shardingsphere-infra-context-5.0.0.jar:5.0.0]
at org.apache.shardingsphere.infra.context.kernel.KernelProcessor.generateExecutionContext(KernelProcessor.java:46) ~[shardingsphere-infra-context-5.0.0.jar:5.0.0]
at org.apache.shardingsphere.driver.jdbc.core.statement.ShardingSpherePreparedStatement.createExecutionContext(ShardingSpherePreparedStatement.java:378) ~[shardingsphere-jdbc-core-5.0.0.jar:5.0.0]
at org.apache.shardingsphere.driver.jdbc.core.statement.ShardingSpherePreparedStatement.execute(ShardingSpherePreparedStatement.java:286) ~[shardingsphere-jdbc-core-5.0.0.jar:5.0.0]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_292]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_292]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_292]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_292]
at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:59) ~[mybatis-3.5.7.jar:3.5.7]
at com.sun.proxy.$Proxy258.execute(Unknown Source) ~[na:na]
at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:47) ~[mybatis-3.5.7.jar:3.5.7]
at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:74) ~[mybatis-3.5.7.jar:3.5.7]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_292]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_292]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_292]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_292]
at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:64) ~[mybatis-3.5.7.jar:3.5.7]
at com.sun.proxy.$Proxy256.update(Unknown Source) ~[na:na]
at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:50) ~[mybatis-3.5.7.jar:3.5.7]
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117) ~[mybatis-3.5.7.jar:3.5.7]
at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76) ~[mybatis-3.5.7.jar:3.5.7]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_292]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_292]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_292]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_292]
at org.apache.ibatis.plugin.Invocation.proceed(Invocation.java:49) ~[mybatis-3.5.7.jar:3.5.7]
at com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor.intercept(MybatisPlusInterceptor.java:106) ~[mybatis-plus-extension-3.4.3.jar:3.4.3]
at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:62) ~[mybatis-3.5.7.jar:3.5.7]
at com.sun.proxy.$Proxy255.update(Unknown Source) ~[na:na]
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:194) ~[mybatis-3.5.7.jar:3.5.7]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_292]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_292]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_292]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_292]
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:427) ~[mybatis-spring-2.0.6.jar:2.0.6]
at com.sun.proxy.$Proxy214.update(Unknown Source) ~[na:na]
at org.mybatis.spring.SqlSessionTemplate.update(SqlSessionTemplate.java:288) ~[mybatis-spring-2.0.6.jar:2.0.6]
at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:64) ~[mybatis-plus-core-3.4.3.jar:3.4.3]
at com.baomidou.mybatisplus.core.override.MybatisMapperProxy$PlainMethodInvoker.invoke(MybatisMapperProxy.java:148) ~[mybatis-plus-core-3.4.3.jar:3.4.3]
at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:89) ~[mybatis-plus-core-3.4.3.jar:3.4.3]
at com.sun.proxy.$Proxy219.updateById(Unknown Source) ~[na:na]
at com.baomidou.mybatisplus.extension.service.IService.updateById(IService.java:148) ~[mybatis-plus-extension-3.4.3.jar:3.4.3]
at com.baomidou.mybatisplus.extension.service.IService$$FastClassBySpringCGLIB$$1.invoke(<generated>) ~[mybatis-plus-extension-3.4.3.jar:3.4.3]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:687) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at com.example.service.impl.GoodsServiceImpl$$EnhancerBySpringCGLIB$$1.updateById(<generated>) ~[classes/:na]
at com.example.controller.GoodsController.init(GoodsController.java:58) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_292]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_292]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_292]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_292]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:652) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:41002) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.37.jar:9.0.37]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_292]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_292]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.37.jar:9.0.37]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_292]
Comment From: miemieYaho
用MetaObjectHandler的default方法
Comment From: WENZIZZHENG
用MetaObjectHandler的default方法并不能解决问题
无论是 fillStrategy()，setFieldValByName()，还是strictFillStrategy()方法
@Component
public class MyMetaObjectHandler implements MetaObjectHandler {
@Override
public void insertFill(MetaObject metaObject) {
}
@Override
public void updateFill(MetaObject metaObject) {
if (metaObject.hasSetter("createTime")) {
setFieldValByName("createTime", null, metaObject);
}
}
}
执行的代码
this.adminService.updateById(admin);
修改时，createTime不为空时
==> Preparing: UPDATE mall_admin SET username=?, password=?, avatar=?, create_time=?, create_name=?, update_time=?, update_name=? WHERE id=? AND deleted=0
==> Parameters: MrWen(String), 123(String), xxxxxxxxxxx(String), 2021-11-29 17:29:57.0(Timestamp), MrWen(String), 2021-11-29 17:29:57.0(Timestamp), MrWen(String), 3(Long)
修改时，当createTime为空时
Preparing: UPDATE mall_admin SET username=?, password=?, avatar=?, create_time=?, create_name=?, update_time=?, update_name=? WHERE id=? AND deleted=0
==> Parameters: MrWen(String), 123(String), xxxxxxxxxxx(String), null, MrWen(String), 2021-11-29 17:29:57.0(Timestamp), MrWen(String), 3(Long)
最终结果还是带有create_time=?，不能满足期待不带上create_time修改条件
若使用自定义mybatis拦截器且可以满足期待条件
Comment From: WENZIZZHENG
事实上，实体类的注解在上@TableField(fill = FieldFill.INSERT_UPDATE) 无论更新时值是否为null，该字段都会更新。能否优化？
Comment From: gaspire
也遇到过：无论更新时值是否为null，该字段都会更新，有办法解决吗？既然实现了MetaObjectHandler 应该以 MetaObjectHandler逻辑为准
Comment From: qmdx
也遇到过：无论更新时值是否为null，该字段都会更新，有办法解决吗？既然实现了MetaObjectHandler 应该以 MetaObjectHandler逻辑为准
设置为填充那么必须是要求存在值的，如果报错那么需要检查执行 SQL 语句正确性，该特性是为了解决插入更新审计操作人等场景的，如果存在自己控制不更新的情况，请不要使用该功能。