symfony:embedRelation方法有问题

我有两门课,一对多有关系。我想做一个嵌套的表单来输入一个对象和其他一些链接到它的对象。

但是当我保存表单时,引用我的主类的键并不是用主类的键更新的。但是其他的键被创建。

我的架构:

Enfant:
  connection: doctrine
  tableName: enfant
  columns:
    id:
      type: integer(2)
      fixed: false
      unsigned: true
      primary: true
      autoincrement: true
    nudparent:
      type: string(20)
      fixed: false
      unsigned: false
      primary: false
      notnull: false
      autoincrement: false
  relations:
    Locataire:
      local: nudparent
      foreign: nud
      type: one
Locataire:
  connection: doctrine
  tableName: locataire
  columns:
    nud:
      type: string(20)
      fixed: false
      unsigned: false
      primary: true
      autoincrement: false
    nbenfants:
      type: integer(1)
      fixed: false
      unsigned: true
      primary: false
      notnull: false
      autoincrement: false
  relations:
    Bail:
      local: nud
      foreign: locataire
      type: many
    Enfant:
      local: nud
      foreign: nudparent
      type: many
    Refus:
      local: nud
      foreign: nud
      type: many

$subForm = new sfForm();
for ($i = 0; $i < 2; $i++)
{
    $enfant = new Enfant();
    $enfant->Locataire = $this->getObject();

    $form = new EnfantForm($enfant);

    $subForm->embedForm($i, $form);
 }
 $this->embedForm('new', $subForm);