I think someone needs to point me back to the basics here. I'm a SilverStripe noobie and am having a terrible time trying to get a has_one from a DataObject into DropdownField on a form, saving that form and saving the selected option.

So I can create the form, I can populate the DropdownField with the correct options. I cannot, however, figure out how to set the default value of the select box (from the existing dataobject) and I can't figure out how to save the selected item.

I've tried setting the fourth argument to DropdownField but it seems to be ignored, or wiped out when I loadDataFrom.

Help!
Greg

class FamilyMember extends DataObject {
   static $db = array(
      'FirstName' => 'Varchar(255)',
      'LastName' => 'Varchar(255)',
      ...
      'Email'     => 'Varchar(100)'
   );

   static $has_one = array(
      'Family' => 'Family',
      'MemberType' => 'MemberType'
   );
   
   public static $summary_fields = array(
      'FirstName' => 'FirstName',
      'LastName' => 'LastName'
   );
   
   static $default_sort = 'DateOfBirth';
}

(from controller)

function Form() {
   $member_type_data = DataObject::get('MemberType');
   $member_type_source = $member_type_data->toDropDownMap('ID','Name');
   
   $fields = new FieldSet(
      new HiddenField('ID', 'ID'),
      new TextField('FirstName', 'First Name'),
      new TextField('LastName', 'Last Name'),
      ...
      new DropdownField('MemberType', 'Member Type', $member_type_source)
   );
   $actions = new FieldSet(
      new FormAction('doSubmitMember', 'Submit')
   );
   $validator = new RequiredFields(
      'FirstName', 'LastName', 'DateOfBirth', 'MemberType'
   );
   $form = new Form(
      $this,
      'Form',
      $fields,
      $actions,
      $validator
   );
   $form->loadDataFrom($this->getFamilyMember());
   return $form;      
}

Dude, you rock! I'm toasting you with a nice glass of 08 Cote du Rhone as I write.

I can't believe I spent 1/2 a day on this one ... lesson learned. Come to forum earlier and ask politely.

Thank you
Greg