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    FreeMarker template error (DEBUG mode; use RETHROW in production!): For "." left-hand operand: Expected a hash, but this has evaluated to a string (wrapper: f.t.SimpleScalar): ==> node [in template "themes/ask/type.html" at line 42, column 40] ---- FTL stack trace ("~" means nesting-related): - Failed at: #if node.parentId == 0 [in template "themes/ask/type.html" at line 42, column 35] - Reached through: @ask_category pid="${askCategory.id}"... [in template "themes/ask/type.html" at line 31, column 21] ~ Reached through: #nested [in template "themes/layout/default.html" in macro "layout" at line 40, column 5] ~ Reached through: @layout title="${askCategory.category... [in template "themes/ask/type.html" at line 2, column 1] ---- Java stack trace (for programmers): ---- freemarker.core.NonHashException: [... Exception message was already printed; see it above ...] at freemarker.core.Dot._eval(Dot.java:45) at freemarker.core.Expression.eval(Expression.java:78) at freemarker.core.EvalUtil.compare(EvalUtil.java:110) at freemarker.core.ComparisonExpression.evalToBoolean(ComparisonExpression.java:64) at freemarker.core.IfBlock.accept(IfBlock.java:46) at freemarker.core.Environment.visit(Environment.java:324) at freemarker.core.MixedContent.accept(MixedContent.java:54) at freemarker.core.Environment.visitByHiddingParent(Environment.java:345) at freemarker.core.IteratorBlock$IterationContext.executeNestedBlockInner(IteratorBlock.java:288) at freemarker.core.IteratorBlock$IterationContext.executeNestedBlock(IteratorBlock.java:220) at freemarker.core.IteratorBlock$IterationContext.accept(IteratorBlock.java:194) at freemarker.core.Environment.visitIteratorBlock(Environment.java:572) at freemarker.core.IteratorBlock.acceptWithResult(IteratorBlock.java:78) at freemarker.core.IteratorBlock.accept(IteratorBlock.java:64) at freemarker.core.Environment.visitByHiddingParent(Environment.java:345) at freemarker.core.IfBlock.accept(IfBlock.java:48) at freemarker.core.Environment.visit(Environment.java:324) at freemarker.core.MixedContent.accept(MixedContent.java:54) at freemarker.core.Environment.visit(Environment.java:324) at freemarker.core.Environment$NestedElementTemplateDirectiveBody.render(Environment.java:2255) at com.jezoe.yuntask.content.directive.AskCategoryDirective.execute(AskCategoryDirective.java:47) at freemarker.core.Environment.visit(Environment.java:389) at freemarker.core.UnifiedCall.accept(UnifiedCall.java:104) at freemarker.core.Environment.visit(Environment.java:324) at freemarker.core.MixedContent.accept(MixedContent.java:54) at freemarker.core.Environment.visit(Environment.java:324) at freemarker.core.Environment.invokeNestedContent(Environment.java:546) at freemarker.core.BodyInstruction.accept(BodyInstruction.java:56) at freemarker.core.Environment.visit(Environment.java:324) at freemarker.core.MixedContent.accept(MixedContent.java:54) at freemarker.core.Environment.visit(Environment.java:324) at freemarker.core.Macro$Context.runMacro(Macro.java:184) at freemarker.core.Environment.invoke(Environment.java:701) at freemarker.core.UnifiedCall.accept(UnifiedCall.java:84) at freemarker.core.Environment.visit(Environment.java:324) at freemarker.core.MixedContent.accept(MixedContent.java:54) at freemarker.core.Environment.visit(Environment.java:324) at freemarker.core.Environment.process(Environment.java:302) at freemarker.template.Template.process(Template.java:325) at cn.kusoft.core.web.freemarker.ThemeFreeMarkerView.processTemplate(ThemeFreeMarkerView.java:143) at cn.kusoft.core.web.freemarker.ThemeFreeMarkerView.renderMergedTemplateModel(ThemeFreeMarkerView.java:127) at org.springframework.web.servlet.view.AbstractTemplateView.renderMergedOutputModel(AbstractTemplateView.java:167) at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303) at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1286) at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1041) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:984) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) at cn.kusoft.core.web.DispatcherServlet.doService(DispatcherServlet.java:35) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:676) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670) at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:2445) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)