Silverstripe 中的嵌套数据对象 3.1？

1 回答

• 3

  在 SilverStripe 中始终可以使用嵌套的 DataObjects。在 3.0 之前的任何版本中，只有界面不存在或非常糟糕，因为 3.0 你可以根据需要嵌套 GridFields，不仅一次，你可以嵌套n次。

  嵌套数据对象没什么特别之处，它与从页面到数据对象的关系一样。关系可以是 has_many，另一侧是 has_one，另一侧是 many_many，。

  这里有 has_many 的例子：

  class TournamentPage extends Page {
      private static $has_many = array('Teams' => 'Team');
      public function getCMSFields() {
          $fields = parent::getCMSFields();
          $fields->addFieldToTab('Root', Tab::create('TeamsTab', 'List of Teams'));
          $fields->addFieldToTab('Root.TeamsTab', GridField::create('Teams', 'The Teams', $this->Teams(), GridFieldConfig_RecordEditor::create());
          return $fields;
      }
  }
  
  class TournamentPage_Controller extends Page_Controller {}
  
  class Team extends DataObject {
      private static $db = array('Title' => 'Varchar');
      private static $has_one = array('TournamentPage' => 'TournamentPage'); // to make has_many of TournamentPage work
      private static $has_many = array('Players' => 'Player');
      public function getCMSFields() {
          $fields = FieldList::create();
          $fields->push(TextField::create('Title', 'Team name');
          $fields->push(GridField::create('Players', 'The Players', $this->Players(), GridFieldConfig_RecordEditor::create());
          return $fields;
      }
  }
  
  class Player extends DataObject {
      private static $db = array('Title' => 'Varchar');
      private static $has_one = array('Team' => 'Team'); // to make has_many of Team work
      private static $has_many = array('DopingProblems' => 'DopingProblem');
      public function getCMSFields() {
          $fields = FieldList::create();
          $fields->push(TextField::create('Title', 'Player name');
          return $fields;
      }
  }
  

  和模板：

  // file: TournamentPage.ss
  <% loop $Teams %>
      Team: $Title<br>
      Number of Players in this Team: $Players.Count<br>
      <ul>
          <% loop $Players %>
              <li>Player name: $Title</li>
          <% end_loop %>
      </ul>
  <% end_loop %>
  

  回复于 2024-05-03T12:33:53+08:00