CODEWITHSUNDEEP
javafreemarker
SeanPlusPlus
SeanPlusPlus

Reputation: 9033

freemarker templates check if sequence is empty

I would like to check if a sequence is empty in a freemarker template.

This snippet works to check if a sequence contains a value:

<#if node.attachments?seq_contains("blue")>
  <pre>hello</pre>
</#if>

However, if node.attachments is empty i would like to do something else.

That is the syntax for this?

Upvotes: 36

Views: 37641

Answers (2)

John Lillard
John Lillard

Reputation: 23

I suggest checking against size of zero. I do NOT suggest using ?has_content becasue of the following:

<#assign new_hash=[]>
Check if the hash has content: 
<#if new_hash?has_content>
    True - it is empty
<#else>
    False - something is there
</#if>

Results in:

Check if the hash has content: False - something is there

Upvotes: 0

Zipper
Zipper

Reputation: 7204

Try:

<#if node.attachments?size != 0>

Or:

<#if node.attachments?has_content>

Upvotes: 67

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