Grails: Tip for scaffolding required fields

Scaffolding is one of the most useful features of grails and customizing scaffolding it's basic for increase your productivity.

One thing I've customized is render a '*' for required fields, for this you have to install scaffolding templates with grails install-templates.

This is a fragment of the original templates/scaffolding/create.gsp,

props.each { p ->
if(p.type != Set.class) {
        cp = domainClass.constrainedProperties[p.name]
        display = (cp ? cp.display : true)    
        if(display) { %>
<tr class="prop">
    <td valign="top" class="name">
        <label for="${p.name}">${p.naturalName}:</label>
    </td>
    <td valign="top" class="value \${hasErrors(bean:${domainClass.propertyName},field:'${p.name}','errors')}">
        ${renderEditor(p)}
    </td>
</tr>
<%  }   }   } %>

I'm going to introduce a line, to check if the field has a constraint blank:false, and in this case render as a required field.

if(!cp?.blank) { %><span class="req">*</span><% } %>

The updated version complete:

   props.each { p ->
if(p.type != Set.class) {
        cp = domainClass.constrainedProperties[p.name]
        display = (cp ? cp.display : true)    
        if(display) { %>
<tr class="prop">
    <td valign="top" class="name">
        <% if(!cp?.blank) { %><span class="req">*</span><% } %>
        <label for="${p.name}">${p.naturalName}:</label>
    </td>
    <td valign="top" class="value \${hasErrors(bean:${domainClass.propertyName},field:'${p.name}','errors')}">
        ${renderEditor(p)}
    </td>
</tr>
<%  }   }   } %>

That's all folks.