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Java

Posted by J Tan
J Tan
11,847 Points

Passing boolean value from Thymeleaf to a Controller in Spring Boot

How do I pass a boolean value from Thymeleaf to a Controller in Spring Boot? I have the following Thymeleaf section. I'm referencing defectStatusOpen which is a Boolean.

<div class="row">
            <div class="col s12 l8" th:classappend="${#fields.hasErrors('defectStatusOpen')} ? 'error' : ''">
                <select th:field="*{defectStatusOpen}">
                    <!--<option value="" disabled="disabled">Defect Status</option>-->
                    <!--<option value="true" selected>Status: Open</option>
                    <option value="false">Status: Closed</option>-->
                    <option value="" disabled="disabled">Category Color</option>
                    <option style="color:#59b3b3">Aqua</option>
                </select>
            </div>
</div>

When I load the form, I get the following error

2017-08-30 12:50:00.912 ERROR 886 --- [nio-8080-exec-2] org.thymeleaf.TemplateEngine             : [THYMELEAF][http-nio-8080-exec-2] Exception processing template "defect/form": Error during execution of processor 'org.thymeleaf.spring4.processor.attr.SpringOptionFieldAttrProcessor' (defect/form:37)
2017-08-30 12:50:00.921 ERROR 886 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateProcessingException: Error during execution of processor 'org.thymeleaf.spring4.processor.attr.SpringOptionFieldAttrProcessor' (defect/form:37)] with root cause

java.lang.IllegalArgumentException: A null value cannot be assigned to a primitive type

I don't understand how it can still be primitive if I've declared in my Entity with private Boolean defectStatusOpen = true;