html - Add binding error messages to custom messages in input tag -

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i playing spring validating form input example - java spring mvc thymeleaf views. have been able pass messages view without issue. these display example wants them to...

e.g.

<td th:if="${#fields.haserrors('name')}" th:errors="*{name}">name error</td>

i trying find way put them html input validation attributes though have tried following (full page below)

<td><input type="text" th:field="*{age}" **required="required" data-errormessage-value-missing="${#fields.errors('age')}" data-errormessage="${#fields.errors('age')}"**/></td>

this has done no though , validation message displayed ${#fields.errors('age')} ! there way push binding errors attribute or misunderstanding way works ?

thanks in advance.

page html

<html> 
<body>     <form action="#" th:action="@{/}" th:object="${personform}" method="post">         <table>             <tr>                 <td>name:</td>                 <td><input type="text" th:field="*{name}" required="required" data-errormessage-value-missing="custom message" /></td>                  <td th:if="${#fields.haserrors('name')}" th:errors="*{name}">name error</td>             </tr>             <tr>                 <td>age:</td>                 <td><input type="text" th:field="*{age}" required="required" data-errormessage-value-missing="${#fields.errors('age')}" data-errormessage="${#fields.errors('age')}"/></td>                 <td th:if="${#fields.haserrors('age')}" th:errors="*{age}">age error</td>             </tr>             <tr>                 <td><button type="submit">submit</button></td>             </tr>         </table>     </form> </body> </html>

thymeleaf evaluates attributes start th:, in order this, have use th:attr. you're tag should like: 

<input type="text" th:field="*{age}" required="required" th:attr="data-errormessage-value-missing=${#fields.errors('age')}, data-errormessage=${#fields.errors('age')}" />

you use plugin evaluate data tags, i've haven't used before can't comment on how works: https://github.com/mxab/thymeleaf-extras-data-attribute


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