Grails，检索记录时出现铸造错误
Grails, casting error when retrieving a record
我创建了一个新域并手动创建了 table。
table 应该只包含一条记录，因此唯一的记录 ID 将是 (1).
如果记录不存在，应该会自动创建，但我在尝试检索记录时总是遇到转换错误。如果我先手动创建记录并不重要 - get、find 或任何总是 return 错误。
失败的代码：
def int id = 1
def WtStatus wts = WtStatus.get(id)?:new WtStatus(id:1).save(failOnError:true)
域名：
class WtStatus {
def prodBufferService
int weekUpdated
Date dateUpdated
def beforeInsert() {
dateUpdated = new Date()
weekUpdated = prodBufferService.getCurrentYearWeek()
}
def beforeUpdate() {
dateUpdated = new Date()
}
static constraints = {
dateUpdated nullable:true
weekUpdated nullable:true
}
static mapping = {
table 'wt_status'
version true
id column: "id", type: 'int'
}
}
table 的创建脚本：
CREATE TABLE [dbo].[wt_status](
[id] [int] NOT NULL,
[version] [bigint] NOT NULL,
[date_updated] [datetime2](7) NULL,
[week_updated] [int] NULL,
CONSTRAINT [PK__wt_statu__3213E83F77809FC6] PRIMARY KEY CLUSTERED
(
[id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
堆栈跟踪：
java.lang.Long cannot be cast to java.lang.Integer. Stacktrace follows:
java.lang.reflect.InvocationTargetException: null
at org.grails.core.DefaultGrailsControllerClass$ReflectionInvoker.invoke(DefaultGrailsControllerClass.java:210)
at org.grails.core.DefaultGrailsControllerClass.invoke(DefaultGrailsControllerClass.java:187)
at org.grails.web.mapping.mvc.UrlMappingsInfoHandlerAdapter.handle(UrlMappingsInfoHandlerAdapter.groovy:90)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:115)
at grails.plugin.springsecurity.web.UpdateRequestContextHolderExceptionTranslationFilter.doFilter(UpdateRequestContextHolderExceptionTranslationFilter.groovy:64)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter.doFilter(GrailsAnonymousAuthenticationFilter.groovy:53)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:158)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter.doFilter(MutableLogoutFilter.groovy:62)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at grails.plugin.springsecurity.web.SecurityRequestHolderFilter.doFilter(SecurityRequestHolderFilter.groovy:58)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
at org.grails.web.servlet.mvc.GrailsWebRequestFilter.doFilterInternal(GrailsWebRequestFilter.java:77)
at org.grails.web.filters.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:67)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Integer
at org.hibernate.type.descriptor.java.IntegerTypeDescriptor.unwrap(IntegerTypeDescriptor.java:19)
at org.hibernate.type.descriptor.sql.IntegerTypeDescriptor.doBind(IntegerTypeDescriptor.java:46)
at org.hibernate.type.descriptor.sql.BasicBinder.bind(BasicBinder.java:74)
at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:253)
at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:248)
at org.hibernate.loader.Loader.bindPositionalParameters(Loader.java:2051)
at org.hibernate.loader.Loader.bindParameterValues(Loader.java:2020)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1950)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1903)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1881)
at org.hibernate.loader.Loader.doQuery(Loader.java:925)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:342)
at org.hibernate.loader.Loader.doList(Loader.java:2622)
at org.hibernate.loader.Loader.doList(Loader.java:2605)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2434)
at org.hibernate.loader.Loader.list(Loader.java:2429)
at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:109)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1787)
at org.hibernate.internal.CriteriaImpl.list(CriteriaImpl.java:363)
at org.hibernate.internal.CriteriaImpl.uniqueResult(CriteriaImpl.java:385)
at org.grails.orm.hibernate.AbstractHibernateGormStaticApi$_get_closure1.doCall(AbstractHibernateGormStaticApi.groovy:79)
at org.grails.orm.hibernate.GrailsHibernateTemplate.doExecute(GrailsHibernateTemplate.java:243)
at org.grails.orm.hibernate.GrailsHibernateTemplate.execute(GrailsHibernateTemplate.java:187)
at org.grails.orm.hibernate.GrailsHibernateTemplate.execute(GrailsHibernateTemplate.java:110)
at org.grails.orm.hibernate.AbstractHibernateGormStaticApi.get(AbstractHibernateGormStaticApi.groovy:75)
at org.grails.datastore.gorm.GormEntity$Trait$Helper.get(GormEntity.groovy:518)
at com.buffer.OrdersAndStoreController$$EQIjps9c.list(OrdersAndStoreController.groovy:29)
... 37 common frames omitted
看起来太复杂了。我想你真正想要的是：
WtStatus wts = WtStatus.findOrSaveById( id )
根据ref-doc
此外，您应该将 id 字段明确定义为 Integer 类型。否则 GORM 默认将它们视为 Long。
问题在于您为 ìd 变量使用的类型是 int。由于您没有在域中声明 id 属性，它将是 Long（Grails 默认值）。注意：在映射块中，您只定义与数据库的关系，这就是为什么 属性 在域中仍然是 Long 的原因。
此外，如果您要为变量使用其他类型，则无需使用 def。试试这个：
Long id = 1
WtStatus wts = WtStatus.get(id)?:new WtStatus(id:1).save(failOnError:true)
我创建了一个新域并手动创建了 table。 table 应该只包含一条记录，因此唯一的记录 ID 将是 (1).
如果记录不存在，应该会自动创建，但我在尝试检索记录时总是遇到转换错误。如果我先手动创建记录并不重要 - get、find 或任何总是 return 错误。
失败的代码：
def int id = 1
def WtStatus wts = WtStatus.get(id)?:new WtStatus(id:1).save(failOnError:true)
域名：
class WtStatus {
def prodBufferService
int weekUpdated
Date dateUpdated
def beforeInsert() {
dateUpdated = new Date()
weekUpdated = prodBufferService.getCurrentYearWeek()
}
def beforeUpdate() {
dateUpdated = new Date()
}
static constraints = {
dateUpdated nullable:true
weekUpdated nullable:true
}
static mapping = {
table 'wt_status'
version true
id column: "id", type: 'int'
}
}
table 的创建脚本：
CREATE TABLE [dbo].[wt_status](
[id] [int] NOT NULL,
[version] [bigint] NOT NULL,
[date_updated] [datetime2](7) NULL,
[week_updated] [int] NULL,
CONSTRAINT [PK__wt_statu__3213E83F77809FC6] PRIMARY KEY CLUSTERED
(
[id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
堆栈跟踪：
java.lang.Long cannot be cast to java.lang.Integer. Stacktrace follows:
java.lang.reflect.InvocationTargetException: null
at org.grails.core.DefaultGrailsControllerClass$ReflectionInvoker.invoke(DefaultGrailsControllerClass.java:210)
at org.grails.core.DefaultGrailsControllerClass.invoke(DefaultGrailsControllerClass.java:187)
at org.grails.web.mapping.mvc.UrlMappingsInfoHandlerAdapter.handle(UrlMappingsInfoHandlerAdapter.groovy:90)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at org.springframework.boot.web.filter.ApplicationContextHeaderFilter.doFilterInternal(ApplicationContextHeaderFilter.java:55)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:115)
at grails.plugin.springsecurity.web.UpdateRequestContextHolderExceptionTranslationFilter.doFilter(UpdateRequestContextHolderExceptionTranslationFilter.groovy:64)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter.doFilter(GrailsAnonymousAuthenticationFilter.groovy:53)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:158)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter.doFilter(MutableLogoutFilter.groovy:62)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at grails.plugin.springsecurity.web.SecurityRequestHolderFilter.doFilter(SecurityRequestHolderFilter.groovy:58)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
at org.grails.web.servlet.mvc.GrailsWebRequestFilter.doFilterInternal(GrailsWebRequestFilter.java:77)
at org.grails.web.filters.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:67)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Integer
at org.hibernate.type.descriptor.java.IntegerTypeDescriptor.unwrap(IntegerTypeDescriptor.java:19)
at org.hibernate.type.descriptor.sql.IntegerTypeDescriptor.doBind(IntegerTypeDescriptor.java:46)
at org.hibernate.type.descriptor.sql.BasicBinder.bind(BasicBinder.java:74)
at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:253)
at org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:248)
at org.hibernate.loader.Loader.bindPositionalParameters(Loader.java:2051)
at org.hibernate.loader.Loader.bindParameterValues(Loader.java:2020)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1950)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1903)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1881)
at org.hibernate.loader.Loader.doQuery(Loader.java:925)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:342)
at org.hibernate.loader.Loader.doList(Loader.java:2622)
at org.hibernate.loader.Loader.doList(Loader.java:2605)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2434)
at org.hibernate.loader.Loader.list(Loader.java:2429)
at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:109)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1787)
at org.hibernate.internal.CriteriaImpl.list(CriteriaImpl.java:363)
at org.hibernate.internal.CriteriaImpl.uniqueResult(CriteriaImpl.java:385)
at org.grails.orm.hibernate.AbstractHibernateGormStaticApi$_get_closure1.doCall(AbstractHibernateGormStaticApi.groovy:79)
at org.grails.orm.hibernate.GrailsHibernateTemplate.doExecute(GrailsHibernateTemplate.java:243)
at org.grails.orm.hibernate.GrailsHibernateTemplate.execute(GrailsHibernateTemplate.java:187)
at org.grails.orm.hibernate.GrailsHibernateTemplate.execute(GrailsHibernateTemplate.java:110)
at org.grails.orm.hibernate.AbstractHibernateGormStaticApi.get(AbstractHibernateGormStaticApi.groovy:75)
at org.grails.datastore.gorm.GormEntity$Trait$Helper.get(GormEntity.groovy:518)
at com.buffer.OrdersAndStoreController$$EQIjps9c.list(OrdersAndStoreController.groovy:29)
... 37 common frames omitted
看起来太复杂了。我想你真正想要的是：
WtStatus wts = WtStatus.findOrSaveById( id )
根据ref-doc
此外，您应该将 id 字段明确定义为 Integer 类型。否则 GORM 默认将它们视为 Long。
问题在于您为 ìd 变量使用的类型是 int。由于您没有在域中声明 id 属性，它将是 Long（Grails 默认值）。注意：在映射块中，您只定义与数据库的关系，这就是为什么 属性 在域中仍然是 Long 的原因。
此外，如果您要为变量使用其他类型，则无需使用 def。试试这个：
Long id = 1
WtStatus wts = WtStatus.get(id)?:new WtStatus(id:1).save(failOnError:true)