Invalid date type for member Long when using @LastModifiedDate and @CreatedDate [DATACMNS-1259]

**[Wyatt Smith](https://jira.spring.io/secure/ViewProfile.jspa?name=wyatt)** opened **[DATACMNS-1259](https://jira.spring.io/browse/DATACMNS-1259?redirect=false)** and commented

I have a model that has a createdDate and lastModifiedDate represented as java.lang.Long, which is valid according to https://docs.spring.io/spring-data/data-commons/docs/current/reference/html/#auditing.annotations.

```java
    @CreatedDate
    private Long dateCreated;

    @LastModifiedDate
    private Long dateModified;
```

When I get the data, I get the following exception:

```
java.lang.IllegalArgumentException: Invalid date type for member Optional[1518491445499]! Supported types are [org.joda.time.DateTime, org.joda.time.LocalDateTime, java.util.Date, java.lang.Long, long].
	at org.springframework.data.auditing.DefaultAuditableBeanWrapperFactory$DateConvertingAuditableBeanWrapper.lambda$null$2(DefaultAuditableBeanWrapperFactory.java:236) ~[spring-data-commons-2.0.3.RELEASE.jar:2.0.3.RELEASE]
	at java.util.Optional.orElseThrow(Optional.java:290) ~[na:1.8.0_144]
	at org.springframework.data.auditing.DefaultAuditableBeanWrapperFactory$DateConvertingAuditableBeanWrapper.lambda$getAsTemporalAccessor$3(DefaultAuditableBeanWrapperFactory.java:235) ~[spring-data-commons-2.0.3.RELEASE.jar:2.0.3.RELEASE]
	at java.util.Optional.map(Optional.java:215) ~[na:1.8.0_144]
	at org.springframework.data.auditing.DefaultAuditableBeanWrapperFactory$DateConvertingAuditableBeanWrapper.getAsTemporalAccessor(DefaultAuditableBeanWrapperFactory.java:225) ~[spring-data-commons-2.0.3.RELEASE.jar:2.0.3.RELEASE]
	at org.springframework.data.auditing.MappingAuditableBeanWrapperFactory$MappingMetadataAuditableBeanWrapper.getLastModifiedDate(MappingAuditableBeanWrapperFactory.java:193) ~[spring-data-commons-2.0.3.RELEASE.jar:2.0.3.RELEASE]
	at org.springframework.data.rest.webmvc.HttpHeadersPreparer.lambda$getLastModifiedInMilliseconds$4(HttpHeadersPreparer.java:122) ~[spring-data-rest-webmvc-3.0.3.RELEASE.jar:3.0.3.RELEASE]
	at java.util.Optional.flatMap(Optional.java:241) ~[na:1.8.0_144]
	at org.springframework.data.rest.webmvc.HttpHeadersPreparer.getLastModifiedInMilliseconds(HttpHeadersPreparer.java:122) ~[spring-data-rest-webmvc-3.0.3.RELEASE.jar:3.0.3.RELEASE]
	at org.springframework.data.rest.webmvc.HttpHeadersPreparer.prepareHeaders(HttpHeadersPreparer.java:83) ~[spring-data-rest-webmvc-3.0.3.RELEASE.jar:3.0.3.RELEASE]
	at org.springframework.data.rest.webmvc.ResourceStatus.getStatusAndHeaders(ResourceStatus.java:71) ~[spring-data-rest-webmvc-3.0.3.RELEASE.jar:3.0.3.RELEASE]
	at org.springframework.data.rest.webmvc.RepositorySearchController.lambda$toResource$1(RepositorySearchController.java:221) ~[spring-data-rest-webmvc-3.0.3.RELEASE.jar:3.0.3.RELEASE]
	at java.util.Optional.map(Optional.java:215) ~[na:1.8.0_144]
	at org.springframework.data.rest.webmvc.RepositorySearchController.toResource(RepositorySearchController.java:206) ~[spring-data-rest-webmvc-3.0.3.RELEASE.jar:3.0.3.RELEASE]
	at org.springframework.data.rest.webmvc.RepositorySearchController.executeSearch(RepositorySearchController.java:190) ~[spring-data-rest-webmvc-3.0.3.RELEASE.jar:3.0.3.RELEASE]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209) ~[spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:870) ~[spring-webmvc-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:776) ~[spring-webmvc-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) ~[spring-webmvc-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) ~[spring-webmvc-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978) [spring-webmvc-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870) [spring-webmvc-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855) [spring-webmvc-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.test.web.servlet.TestDispatcherServlet.service(TestDispatcherServlet.java:66) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
	at org.springframework.mock.web.MockFilterChain$ServletFilterProxy.doFilter(MockFilterChain.java:166) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:320) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter.doFilter(OAuth2AuthenticationProcessingFilter.java:176) [spring-security-oauth2-2.2.1.RELEASE.jar:na]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.debug.DebugFilter.invokeWithWrappedRequest(DebugFilter.java:90) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.security.web.debug.DebugFilter.doFilter(DebugFilter.java:77) [spring-security-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.mock.web.MockFilterChain.doFilter(MockFilterChain.java:133) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.test.web.servlet.MockMvc.perform(MockMvc.java:166) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at one.rizzo.backend.auth.repository.UserRepositoryHttpTest.test_findByUsername_findsUser(UserRepositoryHttpTest.java:65) [classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) [junit-4.12.jar:4.12]
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) [junit-4.12.jar:4.12]
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) [junit-4.12.jar:4.12]
	at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) [junit-4.12.jar:4.12]
	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) [junit-4.12.jar:4.12]
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190) [spring-test-5.0.3.RELEASE.jar:5.0.3.RELEASE]
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137) [junit-4.12.jar:4.12]
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) [junit-rt.jar:na]
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) [junit-rt.jar:na]
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) [junit-rt.jar:na]
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) [junit-rt.jar:na]
```

This appears to be where the exception is happening:

DateConvertingAuditableBeanWrapper:

```java
		protected <T extends TemporalAccessor> Optional<T> getAsTemporalAccessor(Optional<? extends Object> source,
				Class<? extends T> target) {

			return source.map(it -> {

				if (target.isInstance(it)) {
					return (T) it;
				}

				Class<?> typeToConvertTo = Stream.of(target, LocalDateTime.class)//
						.filter(type -> target.isAssignableFrom(type))//
						.filter(type -> conversionService.canConvert(it.getClass(), type))//
						.findFirst()
						.orElseThrow(() -> new IllegalArgumentException(
								String.format("Invalid date type for member %s! Supported types are %s.", source,
										AnnotationAuditingMetadata.SUPPORTED_DATE_TYPES)));

				return (T) conversionService.convert(it, typeToConvertTo);
			});
		}
```

First of all, the first argument of the error message should be "it", not "source" as source is an Optional but "it" is the value of the Optional. More importantly, it looks like it will only accept fields of type "target", which is TemporalAccessor, or a LocalDateTime. Obviously the Long will not inherit from those, but it is still a valid type.

This is affecting my project using Spring Boot 2.0 RC1. Let me know if I can provide any more information.



---

**Affects:** 2.1 M1 (Lovelace), 2.0.3 (Kay SR3)

**Referenced from:** pull request https://github.com/spring-projects/spring-data-commons/pull/273

**Backported to:** [2.0.4 (Kay SR4)](https://github.com/spring-projects/spring-data-commons/milestone/118?closed=1)


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Invalid date type for member Long when using @LastModifiedDate and @CreatedDate [DATACMNS-1259] #1698

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Invalid date type for member Long when using @LastModifiedDate and @CreatedDate [DATACMNS-1259] #1698

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