gistfile1.inc

<?php

class Attachment extends DomainObject
{
    private function configure($schema, $props, $rels)
    {
        $schema
            ->table('attachment')
            ;

        $props
            ->serial('attachmentid', array('primary'=>true))
            ->string('title', 255, array('required'=>true))
            ->string('path', 255, array('required'=>true))
            ;

        $rels
            ->hasOne('Author', 'Author', 'author_id')
            ;

        $this->traits(new TimeTrackedTrait($props));
    }
}

class TimeTrackedTrait extends Trait
{
    public function __construct($props)
    {
        $props
           ->timestamp('timecreated')
           ->timestamp('timemodified')
           ;
    }

    public function preCreate($domainObject)
    {
        $time = time();
        $domainObject->set(array(
            'timecreated' => $time,
            'timemodified' => $time,
        ));
    }
    
    public function preUpdate($domainObject)
    {
        $domainObject->timemodified = time();
    }
}