when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${moi.idMember?c} [in template "pages/member/message_group_page.ftl" at line 77, column 29] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.UnexpectedTypeException.newDescriptionBuilder(UnexpectedTypeException.java:85) at freemarker.core.UnexpectedTypeException.(UnexpectedTypeException.java:48) at freemarker.core.NonHashException.(NonHashException.java:49) at freemarker.core.Dot._eval(Dot.java:57) at freemarker.core.Expression.eval(Expression.java:101) at freemarker.core.BuiltInsForMultipleTypes$AbstractCLikeBI._eval(BuiltInsForMultipleTypes.java:76) at freemarker.core.Expression.eval(Expression.java:101) at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:104) at freemarker.core.DollarVariable.accept(DollarVariable.java:63) at freemarker.core.Environment.visit(Environment.java:380) at freemarker.core.Environment.visitAndTransform(Environment.java:511) at freemarker.core.CompressedBlock.accept(CompressedBlock.java:42) at freemarker.core.Environment.visit(Environment.java:344) at freemarker.core.Environment.process(Environment.java:323) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.processTemplate(FreeMarkerView.java:441) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.doRender(FreeMarkerView.java:345) at org.springframework.web.servlet.view.freemarker.FreeMarkerView.renderMergedTemplateModel(FreeMarkerView.java:296) at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:181) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:307) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1305) at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1042) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:866) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1003) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:892) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:622) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:874) at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:710) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:130) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at com.minapolis.planetesorties.filter.MustachePlaceholderFilter.doFilter(MustachePlaceholderFilter.java:33) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at com.minapolis.planetesorties.filter.NoCacheForSwFilter.doFilter(NoCacheForSwFilter.java:23) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at com.minapolis.planetesorties.filter.AuthPagesFilter.doFilter(AuthPagesFilter.java:149) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at com.minapolis.planetesorties.filter.CookieLogInFilter.doFilter(CookieLogInFilter.java:85) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at com.minapolis.planetesorties.filter.HTTPSFilter.doFilter(HTTPSFilter.java:58) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at com.minapolis.planetesorties.filter.ExpiresFilter.doFilter(ExpiresFilter.java:30) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at com.minapolis.planetesorties.config.FilterConfig.lambda$disableUrlSessionFilter$0(FilterConfig.java:35) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at com.minapolis.planetesorties.filter.ClientContextFilter.doFilter(ClientContextFilter.java:45) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at com.minapolis.planetesorties.filter.RequestIdFilter.doFilter(RequestIdFilter.java:47) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:125) at org.springframework.boot.web.servlet.support.ErrorPageFilter$1.doFilterInternal(ErrorPageFilter.java:100) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.springframework.boot.web.servlet.support.ErrorPageFilter.doFilter(ErrorPageFilter.java:118) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:199) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:109) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:79) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:116) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:420) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:903) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:637) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:59) at java.base/java.lang.Thread.run(Thread.java:1447)