Grid Field Detail Form that has a search sidebar always visible. Note that we just need to modify the item_request, not the whole GridFieldDetailForm. Usage:
class MyDataObjectAdmin extends ModelAdmin {
static $managed_models = array(
'MyDataObject'
);
public function getEditForm($id = null, $fields = null) {
$form = parent::getEditForm($id, $fields);
$config = $form->Fields()->first()->getConfig();
$config->getComponentByType('GridFieldDetailForm')
->setItemRequestClass('GridFieldDetailFormWithSearch_ItemRequest')
->setTemplate('GridFieldDetailFormWithSearch');
return $form;
}
}