NewWinForm.php

class NewWinForm extends Form
{
    function __construct($controller, $name)
    {
        $list = DataObject::get('AreaOfExpertise');
        $source = $list->toDropDownMap('ID', 'Name');
        $fields = new FieldSet(
            new TextField('Customer'),
            new TextField('ProjectName'),
            new DateField('WinDate'),
            new TextareaField('Details'),
            new OptionsetField('AreaOfExpertiseID', 'Area Of Expertise', $source),
            new TextField('ProjectValueLength'),
            new TextField('DeliverTimeframe'),
            new TextField('ProjectTeam'),
            new TextField('Contact')
        );

        $actions = new FieldSet(
            new FormAction('doSubmit', 'Submit')
        );
        $requiredFields = array(
            'Customer',
            'ProjectName',
            'WinDate',
            'Details',
            'AreaOfExpertiseID',
            'ProjectValueLength',
            'DeliverTimeframe',
            'ProjectTeam',
            'Contact',
        );
        $validator = new RequiredFields($requiredFields);
        parent::__construct($controller, $name, $fields, $actions, $validator);
    }
    function forTemplate()
    {
        return $this->renderWith(array(
            'Forms/NewWinForm',
            'Form'
        ));
    }
}