当前位置：首页 >> when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)?? The failing instruction (FTL stack trace): ---------- ==> ${chnl.parentChannel.url!} [in template "templateName" at line 93, column 30] @channel [in template "templateName" at line 91, column 17] ---------- Java stack trace (for programmers): ---------- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:98) at freemarker.core.UnexpectedTypeException.newDesciptionBuilder(UnexpectedTypeException.java:41) at freemarker.core.UnexpectedTypeException.(UnexpectedTypeException.java:24) at freemarker.core.Dot._eval(Dot.java:81) at freemarker.core.Expression.eval(Expression.java:111) at freemarker.core.DefaultToExpression._eval(DefaultToExpression.java:116) at freemarker.core.Expression.eval(Expression.java:111) at freemarker.core.Expression.evalAndCoerceToString(Expression.java:115) at freemarker.core.DollarVariable.accept(DollarVariable.java:76) at freemarker.core.Environment.visit(Environment.java:265) at freemarker.core.MixedContent.accept(MixedContent.java:93) at freemarker.core.Environment.visit(Environment.java:265) at freemarker.core.Environment$1.render(Environment.java:313) at com.ceeye.seesite.tags.ChannelTag.execute(ChannelTag.java:80) at freemarker.core.Environment.visit(Environment.java:341) at freemarker.core.UnifiedCall.accept(UnifiedCall.java:136) at freemarker.core.Environment.visit(Environment.java:265) at freemarker.core.MixedContent.accept(MixedContent.java:93) at freemarker.core.Environment.visit(Environment.java:265) at freemarker.core.Environment.process(Environment.java:243) at freemarker.template.Template.process(Template.java:277) at com.ceeye.common.utils.FreemarkerUtil.writeHtml(FreemarkerUtil.java:110) at com.ceeye.seesite.service.article.ArticleService.publishContent(ArticleService.java:546) at com.ceeye.seesite.common.InitManager.AsyncPublish(InitManager.java:499) at com.ceeye.seesite.common.InitManager.access$000(InitManager.java:58) at com.ceeye.seesite.common.InitManager$1.run(InitManager.java:376) at java.lang.Thread.run(Thread.java:748)

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