Using DomainClassPropertyComparator in grails - grails

Question

In my grails view the ordering applied on the domain class constraints are not picked when i use f:display with each individual property. I heard that domain class property comparator can be used to order the property display as per the constraints applied on the domain class.
Can some body help me on how to use DomainClassPropertyComparator to sort properties on my view?

Answer 1

You can install the scaffolding templates, edit _form.gsp and change the comparator it is using to DomainClassPropertyComparator e.g. my _form.gsp
<%=packageName%>
<% import grails.persistence.Event %>
<% import org.codehaus.groovy.grails.scaffolding.DomainClassPropertyComparator %>
<% excludedProps = Event.allEvents.toList() << 'version' << 'dateCreated' << 'lastUpdated'
persistentPropNames = domainClass.persistentProperties*.name
boolean hasHibernate = pluginManager?.hasGrailsPlugin('hibernate')
if (hasHibernate && org.codehaus.groovy.grails.orm.hibernate.cfg.GrailsDomainBinder.getMapping(domainClass)?.identity?.generator == 'assigned') {
persistentPropNames << domainClass.identifier.name
}
DomainClassPropertyComparator mattsComparator = new DomainClassPropertyComparator(domainClass)
comparator = mattsComparator
props = domainClass.properties.findAll { persistentPropNames.contains(it.name) && !excludedProps.contains(it.name) }
Collections.sort(props, comparator)
for (p in props) {
if (p.embedded) {
def embeddedPropNames = p.component.persistentProperties*.name
def embeddedProps = p.component.properties.findAll { embeddedPropNames.contains(it.name) && !excludedProps.contains(it.name) }
Collections.sort(embeddedProps, comparator)
%><fieldset class="embedded"><legend><g:message code="${domainClass.propertyName}.${p.name}.label" default="${p.naturalName}" /></legend><%
for (ep in p.component.properties) {
renderFieldForProperty(ep, p.component, "${p.name}.")
}
%></fieldset><%
} else {
renderFieldForProperty(p, domainClass)
}
}
private renderFieldForProperty(p, owningClass, prefix = "") {
boolean hasHibernate = pluginManager?.hasGrailsPlugin('hibernate')
boolean display = true
boolean required = false
if (hasHibernate) {
cp = owningClass.constrainedProperties[p.name]
display = (cp ? cp.display : true)
required = (cp ? !(cp.propertyType in [boolean, Boolean]) && !cp.nullable && (cp.propertyType != String || !cp.blank) : false)
}
if (display) { %>
<div class="fieldcontain \${hasErrors(bean: ${propertyName}, field: '${prefix}${p.name}', 'error')} ${required ? 'required' : ''}">
<label for="${prefix}${p.name}">
<g:message code="${domainClass.propertyName}.${prefix}${p.name}.label" default="${p.naturalName}" />
<% if (required) { %><span class="required-indicator">*</span><% } %>
</label>
${renderEditor(p)}
</div>
<% } } %>