Checks whether a bean, request scope, or model reference has any errors and if it does invokes the body of the tag. Typically used in conjunction with either eachError or renderErrors


Checks whether there are any errors for any bean throughout the request scope:


Checks whether there are any errors for the specified bean

<g:hasErrors bean="${book}">

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" />

As a method call in GSP only. In this case we check for a field error on a particular field and set a CSS class on the surround div thus allowing us to highlight the error with a red border for example:

<div class="prop ${hasErrors(bean:user,field:'login', 'errors')}">
    <label for="login"><input type="text" name="login" />

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'} />




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