Many additional fields are not saved.

Question

I am running SilverStripe 3.4

I cannot find documentation on programmatically storing many additional relationships. The following code just won't work:

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 classes:

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"
        )
    );
}

It looks like I saw it DataObject::getChangedFieldsfiltering my field Readbecause it is not a "database field"

Note. I redefined Notification::onBeforeWrite, but:

• I do not think this is called

• I have this code at the beginning of it:

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

Answer 1

I found a counter intuitive answer:

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
    ]);
}

It doesn't make sense (adding something that is already on the list to the list), but it works. I hope they update it.