The Grails Framework 3.2.3

(Quick Reference) ## hasErrors ### Purpose Checks whether a bean, request scope, or model reference has any errors and if so invokes the body of the tag. Typically used in conjunction with either eachError or renderErrors ### Examples Checks whether there are any errors for any bean throughout the request scope:
    <g:hasErrors>
        <g:eachError><p><g:message error="${it}"/></p></g:eachError>
    </g:hasErrors>
Checks whether there are any errors for the specified bean
    <g:hasErrors bean="${book}">
        <g:eachError><p><g:message error="${it}"/></p></g:eachError>
    </g:hasErrors>
Checks whether there are any errors for the field "title" of the specified "book" bean:
    <g:hasErrors bean="${book}" field="title">
        <div class="errors">
           <g:renderErrors bean="${book}" field="title" as="list" />
        </div>
    </g:hasErrors>
As a method call in GSP:
    <div class="prop ${hasErrors(bean:user,field:'login', 'errors')}">
        <label for="login"><input type="text" name="login" />
    </div>
In this case we check for a field error on a particular field and set a CSS class on the surrounding div thus allowing us to highlight the error with a red border by appending the `errors` CSS class. Checking for errors inside a nested object:
    <div class="prop ${hasErrors(bean:parent, field:'child.name', 'errors')}">
        <label for="child.name" />
        <input type="text" name="child.name"
               value="${fieldValue(bean: parent, field: 'child.name'} />
    </div>
### Description Attributes `bean` (optional) - The bean to check for errors `model` (optional) - The name of the model reference to check for errors `field` (optional) - Check if a field of the bean or model reference has errors | Quick Reference (hide)