SilverStripe 如何写入国外关系的字段

SilverStripe how to write to foreign relationship's field

向国外关系字段写入表单值的最佳方式是什么?

我需要将 $coachField 的值保存到外部 table 中的特定列中。 IE:在 Team 对象表单中,我需要能够保存 Coach 的名称 (它们具有一对一的记录关系)

我倾向于在 Team 中使用 onAfterWrite 来获取教练的名字,但我不确定首先如何检索该值以及最重要的是,如果这是最好的方法。

当前数据对象

class Team extends DataObject {

    // The value needs to be saved in Coach->Name
    private static $has_one = array(
        'Coach' => 'Coach'
    );

    public function getCMSFields() {

        // The form field where to get the value from
        $coachField = TextField::create('CoachName', 'Who is the coach');

    }
}

外部数据对象

class Coach extends DataObject {

    // Here's where the name should be written to
    private static $db = array(
        'Name' => 'Varchar'
    );

    private static $belongs_to = array(
        'Team' => 'Team'
    );
}

对于 1:1 关系,您可以使用 hasoneedit 模块。字段名称应该是HasOneName-_1_-FieldName like

class Team extends DataObject {

    // The value needs to be saved in Coach->Name
    private static $has_one = array(
        'Coach' => 'Coach'
    );

    public function getCMSFields() {

        $fields = parent::getCMSFields(); //scaffold all fields

        // The form field where to get the value from
        $fields->addFieldsToTab('Root.Main', TextField::create('Coach-_1_-Name', 'Who is the coach');

        return $fields;
    }
}

它会自动神奇地保存到 has_one 关系。