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Question

I'm trying to hide a button in the header of my Spring Boot application in the following way with my markup:

<!-- Is not logged in, so don't show "Log In" -->
<li sec:authorize="!isAuthenticated()">
    <a href="/login" th:href="@{/login}" class="btn-login">Log In</a>
</li>\

Is this not correct? I'm using the Thymeleaf templating engine.

Answer 1

Add Spring Security Dialect in spring boot app for sec attribute to work,

@Configuration
public class ThymeleafConfig {

    @Bean
    public SpringSecurityDialect springSecurityDialect(){
        return new SpringSecurityDialect();
    }
}

If you have a Spring Security Dialect, then you can try,

<!-- Show login link only for anonymous users -->
<div sec:authorize="isAnonymous()">
    <a href="/login" th:href="@{/login}" class="btn-login">Log In</a>
</div>

Answer 2

You can use simple if's: http://www.thymeleaf.org/doc/tutorials/2.1/usingthymeleaf.html#simple-conditionals-if-and-unless

But you have to put the objects, you use in the if's, before into the (Spring) Model