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[ERROR: The following has evaluated to null or missing: ==> articleInfo [in template "web/article_info_info.ftl" at line 50, column 49] ---- Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>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: ${articleInfo.title!} [in template "web/article_info_info.ftl" at line 50, column 47] ----]

发布时间:[ERROR: The following has evaluated to null or missing: ==> articleInfo [in template "web/article_info_info.ftl" at line 52, column 54] ---- Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>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: ${articleInfo.createTime?string("yyyy... [in template "web/article_info_info.ftl" at line 52, column 52] ----]
[ERROR: The following has evaluated to null or missing: ==> articleInfo [in template "web/article_info_info.ftl" at line 56, column 31] ---- Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>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: ${articleInfo.content!} [in template "web/article_info_info.ftl" at line 56, column 29] ----]