在GridField中顯示來自many_many關係的標題 - Silverstripe

Question

如何在GridField Summary中顯示來自many_many關係的標題？

我RelationName.Title嘗試過，但結果卻是隻有一個空場

Answer 1

colymba的答案已經說了大部分，但除了你也可以在$summary_fields指定的方法。這允許您在GridField中顯示圖像縮略圖，或者根據需要顯示圖像縮略圖，並將它們從many_many關係的標題中拼湊出來。

class TeamMember extends DataObject { 
    private static $db = array(
     'Title' => 'Text', 
     'Birthday' => 'Date', 
    ); 
    private static $has_one = array(
     'Photo' => 'Image' 
    ); 
    private static $has_many = array(
     'Teams' => 'Team' 
    ); 
    private static $summary_fields = array(
     'PhotoThumbnail', 
     'Title', 
     'Birthday', 
     'TeamsAsString', 
    ); 
    public function getPhotoThumbnail() { 
     // display a thumbnail of the Image from the has_one relation 
     return $this->Photo() ? $this->Photo()->CroppedImage(50,50) : ''; 
    } 
    public function getTeamsAsString() { 
     if (!$this->Teams()) { 
      return 'not in any Team'; 
     } 
     return implode(', ', $this->Teams()->Column('Title')); 
     // or if one field is not enough for you, you can use a foreach loop: 
     // $teamsArray= array(); 
     // foreach ($this->Teams() as $team) { 
     //  $teamsArray[] = "{$team->ID} {$team->Title}"; 
     // } 
     // return implode(', ', $teamsArray); 
    } 
} 

替代就可以了，因爲colymba指出，還可以使用setDisplayFields在不同的網格

Answer 2

應該有幾個解決方案：

的數據對象定義$summary_fields一個鏈接：

private static $summary_fields = array(
    'YourFieldName', 
    'AnotherField' 
); 

或與頁面/數據對象上定義關係的GridFieldConfig：

$config->getComponentByType('GridFieldDataColumns')->setDisplayFields(array(  
    'FieldName' => 'GridFieldColumnName', 
    'AnotherFieldName' => 'AnotherGridFieldColumnName', 
)); 

$config是您的GridFieldConfig實例，由GridField使用。

編輯

更先進的格式/納入GridField對數據的控制，你可以使用setFieldFormatting：

$config->getComponentByType('GridFieldDataColumns')->setDisplayFields(array(  
    'TeamLink' => 'Edit teams' 
)); 

$config->getComponentByType('GridFieldDataColumns')->setFieldFormatting(array(
    'TeamLink' => function($value, $item) 
    { 
     // $item here would be a TeamMember instance 
     // since the GridField displays TeamMembers 

     $links = 'No teams'; 

     $teamModelAdminClass = 'TeamModelAdmin'; //change to your classname 
     $teams = $item->Teams(); // get the teams 

     if ($teams->count() > 0) 
     { 
     $links = ''; 
     $teamClass = $teams->dataClass; 

      $teamAdminURL = Config::inst()->get($teamModelAdminClass, 'url_segment'); 
      $teamEditAdminURL = 'admin/'.$teamAdminURL.'/'.$teamClass.'/EditForm/field/'.$teamClass.'/item/';  

      foreach($teams as $team) 
      { 
      $links .= '<a href="'.$teamEditAdminURL.$team->ID.'/edit">Edit '.$team->Title.'</a><br/>'; 
      } 
     } 

     return $links; 
    } 
)); 

這裏setFieldFormatting將輸出編輯鏈接到所有團隊，一個TeamMember是部分TeamLink列由setDisplayFields定義（可能不是最好的例子，但希望你明白，儘管未經過測試）。