Question

从我的代码FreeMarker中的表单数据中检查布尔值是否是正确的语法是什么？

<#if "${form.allStores}" !false>
        <@displayRow label="Receiving Stores" value="All Stores" />
    <#elseif "${form.storesReceiving}" == false || "${form.storesReceiving}"?has_content>
        <@displayRow label="Receiving Stores" value="No Stores"/>
    <#else>

我收到此错误：

Could not prepare mail; nested exception is freemarker.core._MiscTemplateException: Can't convert boolean to string automatically, because the "boolean_format" setting was "true,false", which is the legacy default computer-language format, and hence isn't accepted. --

Answer 1

类似于Java，使用!操作数取反：

<#if !form.allStores> 
      <@displayRow label="Receiving Stores" value="No Stores"/>

那么布尔值只能是true / false，所以不需要elseif：

<#else>
        <@displayRow label="Receiving Stores" value="All Stores" />
</#if>

还喜欢将第一个阳性条件用作：

<#if form.allStores> 
       <@displayRow label="Receiving Stores" value="All Stores" />
<#else>
        <@displayRow label="Receiving Stores" value="No Stores"/>
</#if>

或者简单地使用freemarker的then function：

<@displayRow label="Receiving Stores" value="${form.allStores?then('All Stores', 'No Stores')}"/>

此内置功能自FreeMarker 2.3.23开始存在。

像booleanExp？then（whenTrue，whenFalse）一样使用

Freemarker-检查布尔值

1 个答案: