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Data Model Questions /

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

┬žsummary_fields & $has_one problem

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2 Posts   1922 Views


Community Member, 6 Posts

10 October 2012 at 5:53am

Edited: 10/10/2012 5:54am

Hey folks,

I'm building a phpMyAdmin-like backend for my smartphone applications.

I have 4 Models:

- Band
- News
- Konzert
- Release

Each News / Konzert / Release $has_one Band, so if I add a new e.g. News there should be a DropdownField with all Bands. This works but it just shows me #1, #2, ... instead of the Band's title.

Second problem: The fields are shown as columns in a GridView but the aliases do not work ...

Hoping so. can help me.

Some Code:

class Konzert extends DataObject {

	// Contact object's fields
	public static $db = array(
		'doorsopen' => 'Text'
	/*public static $has_one = array(
		'Band' => 'Band'

	// Summary fields
	public static $summary_fields = array(
		'doorsopen' => 'Doors-Open' //shows "doorsopen" not "Doors-Open"

	public function getCMSFields_forPopup() {

		// Name, Description and Website fields
		return new FieldList(
			new TextField('doorsopen', 'Doors-Open')


class AppModelAdmin extends ModelAdmin {
  public static $managed_models = array('News', 'Band', 'Konzert', 'Release');
  static $url_segment = 'app';
  static $menu_title = 'App-Verwaltung';

Optic Blaze

Community Member, 190 Posts

14 October 2012 at 12:27pm

Ok i had a look at the code. To fix your problems you need to look at the following. I tested it om my side and it works.


class Konzert extends DataObject {
static $db=array(
static $has_one = array(
// Left side is the name of relationship --- right hand side is the class is related to. This has_one relationship creates a column called
// BandsID in our Konzert table to show Silverstripe that there is a relationship between the two classes

// Sets the sumary fields that will be displayed in the grid field
static $summary_fields = array(

function getCMSFields() {
// to populate drowp down field for 'Band' it needs a source. We then 'map' the 'ID' col as the the one used to store values in database
// and 'Name' is the name of the band ---- see code for 'Band.php'
$BandDropdown = Dataobject::get("Band")->map("ID", "Name");

// create new field list and remember we need to add our has_one field 'Band' in as well
$fields = new FieldList (

new TextField('KonzertName', 'Name of the Konzert'),
new TextField('DoorsOpen', 'Doors Open'),
// The drop down field has 4 parameters:
// 1) Name of the field that we are saving to. In our case it is has one relationship called 'Bands' that created a <br />
// field called BandsID in the table called Konzeret.
// 2) The description 'Bands Playing'
// 3) The values we want in our drop down menu we created above
// 4) We leave params 4 and 5 open and set the deefault message for the drop down to 'Please select'
new DropdownField('BandsID', 'Bands Playing', $BandDropdown,'','','--Please Select--')
return $fields;

// Now we set validation for our Data Object Fields
public function getCMSValidator() {
return new RequiredFields(
// Remember our drop down field references the has_one relationship with the field BandsID


class Band extends DataObject {
static $db=array(


function getCMSFields() {
$fields = new FieldList (
new TextField('Name', 'Band Name')
return $fields;