/**
* Merges a field group into this group. The group must have a unique name
* within the group. Otherwise the existing field is overwritten.
*
* Contrary to added groups, merged groups operate on the same object as
* the group they are merged into.
*
* <code>
* class Entity
* {
* public $longitude;
* public $latitude;
* }
*
* $entity = new Entity();
*
* $form = new Form('entity', $entity, $validator);
*
* $locationGroup = new FieldGroup('location');
* $locationGroup->add(new TextField('longitude'));
* $locationGroup->add(new TextField('latitude'));
*
* $form->merge($locationGroup);
* </code>
*
* @param FieldGroup $group
*/
public function merge(FieldGroup $group)
{
if ($group->isBound()) {
throw new AlreadyBoundException('A bound form group cannot be merged');
}
foreach ($group as $field) {
$group->remove($field->getKey());
$this->add($field);
if (($path = $group->getPropertyPath()) !== null) {
$field->setPropertyPath($path . '.' . $field->getPropertyPath());
}
}
return $this;
}
public function testRemoveUnsetsFieldParent()
{
$group = new FieldGroup('author');
$field = $this->createMockField('firstName');
$field->expects($this->exactly(2))->method('setParent');
// PHPUnit fails to compare subsequent method calls with different arguments
$group->add($field);
$group->remove('firstName');
}