Typo3 f:if 中的流体使用条件视图助手

Question

is there a way to use ConditionViewHelpers inside of f:if ?

Eg (with example of VHS isInteger):

Standalone Tag works:
<vhs:condition.type.isInteger value="1">TRUE1</vhs:condition.type.isInteger>

Standalone Inline works:
{vhs:condition.type.isInteger(value:1, then:'TRUE2')}

Inline in if doesn't work:
<f:if condition="{vhs:condition.type.isInteger (value:1)}">TRUE3</f:if>

This will output

TRUE1 TRUE2

So my question is, can I use a subclass of AbstractConditionViewHelper inside a standard f:if ?

My ultimate goal is to combine conditions, like

<f:if condition="{var} == 1 && {vhs:condition.type.isInteger(value:1)}">...</f:if>

I'm using Typo3 10.4

Answer 1

Yes, you can use ViewHelpers inside a condition in f:if . The result of the ViewHelper will be the input for the condition. However, the result of {vhs:condition.type.isInteger(value:1)} is an empty string because you haven't set a then . What you need is {vhs:condition.type.isInteger(value:1, then: '1')} . This will result in 1 , which will be true in the condition.