我再次被迫尝试解决 Ldap 的这个问题——记住我的功能，但又是它引起的问题。
目前我有支持 Ldap 身份验证的 Grails 2.2.4 应用程序，但检查记住我选项会导致错误如下：
java.lang.IllegalArgumentException: Dynamic method get<Artefact>Class(artefactName) requires a single String parameter
at org.codehaus.groovy.grails.commons.DefaultGrailsApplication.invokeMethod(DefaultGrailsApplication.java:673)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:45)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
at grails.plugin.springsecurity.userdetails.GormUserDetailsService.loadUserByUsername(GormUserDetailsService.groovy:57)
at grails.plugin.springsecurity.userdetails.GormUserDetailsService.loadUserByUsername(GormUserDetailsService.groovy:82)
at org.springframework.security.web.authentication.rememberme.TokenBasedRememberMeServices.onLoginSuccess(TokenBasedRememberMeServices.java:178)
at org.springframework.security.web.authentication.rememberme.AbstractRememberMeServices.loginSuccess(AbstractRememberMeServices.java:258)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.successfulAuthentication(AbstractAuthenticationProcessingFilter.java:324)
at grails.plugin.springsecurity.web.authentication.RequestHolderAuthenticationFilter.successfulAuthentication(RequestHolderAuthenticationFilter.java)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.successfulAuthentication(AbstractAuthenticationProcessingFilter.java:298)
at grails.plugin.springsecurity.web.authentication.RequestHolderAuthenticationFilter.successfulAuthentication(RequestHolderAuthenticationFilter.java)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:235)
at grails.plugin.springsecurity.web.authentication.RequestHolderAuthenticationFilter.doFilter(RequestHolderAuthenticationFilter.java:49)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
at grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter.doFilter(MutableLogoutFilter.java:82)
at org.springframework.security.web.FilterChainProxy$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:346)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.codehaus.groovy.grails.web.servlet.mvc.GrailsWebRequestFilter.doFilterInternal(GrailsWebRequestFilter.java:69)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.codehaus.groovy.grails.web.filters.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:66)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:701)
我尝试了各种方法来解决这个问题，但我只是不了解它的本质。它给了我关于可能出错的完全零信息。如果有人遇到类似的问题，我会很感激一些线索。我想“记住我”来使用 cookie。
用于记住我的 Ldap 配置：
grails.plugin.springsecurity.ldap.rememberMe.detailsManager.groupSearchBase='ou=LALALAL,O=LALALAL,C=LALALAL'
grails.plugin.springsecurity.ldap.rememberMe.usernameMapper.userDnBase='O=LALALAL,C=LALALAL'
grails.plugin.springsecurity.ldap.rememberMe.usernameMapper.usernameAttribute="SOME ID"
为可能需要它的人编辑：
问题是 PersistentTokenBasedRememberMeService 中的一行
UserDetails user = getUserDetailsService().loadUserByUsername(token.getUsername());
它想使用 GormUserDetailsService 来检索有关用户的数据，但由于 Ldap 失败了。没有可从中获取数据的数据库。
可能的解决方法是用自定义类替换 UserDetailsService。