许多许多额外的字段不保存

Question

我正在运行 SilverStripe 3.4

我找不到任何有关以编程方式保存许多关系额外字段的文档。下面的代码根本行不通：

foreach ($notifications as $notification) {
    $status = $notification
        ->Members()
        ->filter([
            "ID" => Member::currentUserID()
        ])
        ->first();
    $data['Read'] = $status->Read; // whenever I call this code, $status->Read is ALWAYS 0
    $status->Read = 1;
    $status->write();
}

ORM 类：

class Notification extends DataObject {
    private static $belongs_many_many = [
        "Members" => "Member"
    ];
}

class Member extends DataObject {

    private static $many_many = array(
        "Notifications" => "Notification"
    );

    private static $many_many_extraFields = array(
        "Notifications" => array(
            "Read" => "Boolean"
        )
    );
}

四处寻找，我看到DataObject::getChangedFields 过滤掉了我的Read 字段，因为它不是“数据库字段”

注意：我已经覆盖了Notification::onBeforeWrite 但是：

• 我不认为这叫

• 我在它的开头有这个代码：

  protected function onBeforeWrite() {
      parent::onBeforeWrite();
      $changedFields = $this->getChangedFields();
      if (isset($changedFields['Read']) && count($changedFields) == 1) {
          return;
      }
  }
  

Answer 1

我找到了反直觉的答案：

foreach($notifications as $notification){
    $data = $notification->toMap();
    $list = $notification->Members()
        ->filter([
            "ID"=>Member::currentUserID()
        ]);
    $status = $list->first();
    $data['Read'] = $status->Read;

    $list->add(Member::currentUserID(),[
        "Read"=>1
    ]);
}

这没有任何意义（将列表中已经存在的内容添加到列表中），但它有效。我希望他们更新这个。