Thymeleaf check if array contains string

Question

I want to check if an array contains a certain string and render based if its there or not.

testResponse.test1.itemTypes = ['here', 'nothere']

<div th:if="${testResponse!= null AND testResponse.test1.itemTypes == 'here'}">
<ul>
    <li><span>I'm here</span></li>
</ul>

Answer 1

You can use the Thymeleaf #arrays.contains() expression - see the documentation here.

So, for your example it would be:

<div th:if="${testResponse != null 
       and #arrays.contains(testResponse.test1.itemTypes, 'here')}">
    <ul>
        <li><span>I'm here</span></li>
    </ul>
</div>

Note that the and has to be lower case. AND is not valid Thymeleaf syntax.

UPDATE:

For the additional case mentioned in comments, use the not operator as follows:

<div th:if="${testResponse != null 
       and not #arrays.contains(testResponse.test1.itemTypes, 'here')}">
    <ul>
        <li><span>I'm missing</span></li>
    </ul>
</div>