Silverstripe 3 - GridFieldExtensions 多类添加

Question

我正在尝试使用 https://github.com/silverstripe-australia/silverstripe-gridfieldextensions/创建一个网格字段，我可以在其中添加不同类型的数据对象。

可悲的是，我无法弄清楚如何在我想要网格字段的类中为此编写正确的代码。

有人能给我指出正确的方向吗？

更新:根据您的回答，我现在有以下结构

class ModularPage extends Page {

   private static $has_many = array(
    'Sections' => 'MP_Section',
    'Galleries' => 'MP_Gallery',
    'Paragraphs' => 'MP_Paragraph'
    );

    public function getCMSFields() {
        ...

        $fields->addFieldToTab('Root.Main', $mutli_grid = GridField::create('Sections', 'Sektionen', $this->Sections(), MultiClassGrid::create(15)));

        ...
    }

}

class MP_Section extends DataObject {

    private static $has_one = array(
        'Section' => 'MP_Section',
        'ModularPage' => 'ModularPage'
    );

}

class MP_Gallery extends MP_Section {

    private static $has_one = array(
        'Section' => 'MP_Section',
        'ModularPage' => 'ModularPage'
    );

}

到目前为止，还好吗？到现在为止都是这样吗？

原因如果我想添加一个画廊，我会收到以下错误

[User Error] Couldn't run query: SELECT DISTINCT "MP_Section"."ID", "MP_Section"."SortID" FROM "MP_Section" LEFT JOIN "MP_Gallery" ON "MP_Gallery"."ID" = "MP_Section"."ID" LEFT JOIN "MP_Paragraph" ON "MP_Paragraph"."ID" = "MP_Section"."ID" WHERE ("ModularPageID" = '13') ORDER BY "MP_Section"."SortID" ASC LIMIT 9223372036854775807 Column 'ModularPageID' in where clause is ambiguous

Answer 1

这是我通常如何设置我的 GridField:

$c = GridFieldConfig_RelationEditor::create();
$c->removeComponentsByType('GridFieldAddNewButton')
  ->addComponent(new GridFieldAddNewMultiClass())
  ;

$c->getComponentByType('GridFieldAddNewMultiClass')
  ->setClasses(array(
    'SectionThemesBlock'    => SectionThemesBlock::get_section_type(),
    'SectionFeaturedCourse' => SectionFeaturedCourse::get_section_type(),
    'SectionCallForAction'  => SectionCallForAction::get_section_type(),
    'SectionContactSheet'   => SectionContactSheet::get_section_type()
    //....
  ));

$f = GridField::create('Sections', "Sections", $this->Sections(), $c);
$fields->addFieldToTab("Root.Sections", $f);

基于GridFieldConfig_RelationEditor，只需删除GridFieldAddNewButton，然后添加GridFieldAddNewMultiClass。然后配置组件以了解要创建的下拉列表中有哪些类可用。所有这些 SectionThemesBlock、SectionFeaturedCourse 等都扩展了一个通用的 Section 数据对象作为基础。 get_section_type() 函数是 Section 数据对象上的自定义静态函数，用于在下拉列表中获得一个漂亮的名称，而不必一直手动输入... .

Section 数据对象的基础如下所示:

class Section extends DataObject {

  public static function get_section_type()
  {
    return trim(preg_replace('/([A-Z])/', ' $1', str_ireplace('Section', '', get_called_class())));
  }

  //...
}

以及该 gridField 所在的页面以及定义了关系的页面:

class Page extends SiteTree {
  //...
  private static $has_many = array(
    'Slides' => 'Slide'
  );
  //...
}