Spring Boot + Thymeleaf parsing error in loop

Question

Spring Boot application with Thymeleaf views gives me parsing error when I try to use index variable inside array like this:

<tr th:each="cdItem, stat : *{commonDataItems}">      
      <td th:text=${stat.index}>Index</td>      
      <td> <input type="text" th:field=*{commonDataItems[__${stat.index}__].value>Value</td>    
</tr>

This <td th:text=${stat.index}>Index</td> line is for testing purposes and it gives the right index value, but next line <td> <input type="text" th:field=*{commonDataItems[__${stat.index}__].value>Value</td> gives parsing error. Error message is:

org.thymeleaf.exceptions.TemplateProcessingException: Could not parse as expression: "*{commonDataItems[__${stat.index}__].value" (common)
    at org.thymeleaf.standard.expression.StandardExpressionParser.parseExpression(StandardExpressionParser.java:238) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]
    at org.thymeleaf.standard.expression.StandardExpressionParser.parseExpression(StandardExpressionParser.java:79) ~[thymeleaf-2.1.4.RELEASE.jar:2.1.4.RELEASE]

Any ideas what is wrong?

Are you missing quotes or is that just a typo: th:field="*{commonDataItems[__${stat.index}__].value" — Dave Bower
– Dave Bower, Commented Apr 12, 2016 at 8:59
Thanks, that was it. Not too proud of myself now though :) You can write that as an answer and I'll accept it. — JohnP
– JohnP, Commented Apr 12, 2016 at 10:41

Dave Bower · Accepted Answer · 2016-04-12 10:49:29Z

2

Missing quotes! th:field="*{commonDataItems[__${stat.index}__].value"

So:

<tr th:each="cdItem, stat : *{commonDataItems}">      
      <td th:text=${stat.index}>Index</td>      
      <td> <input type="text" th:field="*{commonDataItems[__${stat.index}__].value">Value</td>    
</tr>

answered Apr 12, 2016 at 10:49

Dave Bower

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