I created function in Freemarker:
<#function formatDate anyDate> <#assign dateFormat = read_from_configuration() /> <#if anyDate??> <#return anyDate?date(dateFormat) /> <#else > <#return '' /> </#if> </#function>
I call it like this: ${formatDate(object.someDate)}
.
It all works until someDate
is null. In that case I get exception:
Error executing macro: formatDate required parameter: anyDate is not specified.
How can I do this? I want the function to work if parameter values is null.
Here's what I did, which seems to work in most scenarios:
The default value should be an empty string, and the null-check should be ?has_content.
<#function someFunction optionalParam="" >
<#if (optionalParam?has_content)>
<#-- NOT NULL -->
<#else>
<#-- NULL -->
</#if>
</#function>
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