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Form Questions /

Moderators: martimiz, Sean, Ed, biapar, Willr, Ingo, swaiba

DataObject has_one DropdownField

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4 Posts   3945 Views


Community Member, 12 Posts

13 April 2011 at 9:26am

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.


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(
return $form;


Community Member, 130 Posts

13 April 2011 at 1:00pm

I think you may need

new DropdownField('MemberTypeID', 'Member Type', $member_type_source)


Community Member, 12 Posts

13 April 2011 at 3:54pm

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


Community Member, 16 Posts

15 April 2011 at 8:36am

@JonoM A tip of the hat to you, sir! I too had been fighting with this gnarly issue for longer than I care to admit. Thanks for making the stripey silver road a little smoother.