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                >[danger] bind() 綁定屬性到父模型 + 配合`預載入查詢`使用 + 在定義關聯的使用bind()方法可以將屬性綁定到父模型上 + 如:將用戶資料表的屬性綁定到用戶表模型上 >[danger] 示例 關聯方法 ``` /** * profile 關聯方法名 */ public function profile() { // \app\model\AdminInfo::class 關聯模型類名 // 'aid' 外鍵字段名 // 'tid' 主鍵字段名 return $this->hasOne(\app\model\AdminInfo::class, 'aid') ->bind(['nickname']); } ``` 綁定屬性到父模型上 ``` $admin = self::with('profile')->find(1); dump($admin->toArray()); /* array:4 [▼ "uid" => 1 "tid" => 3 "username" => "112" "nickname" => "富商大賈" ] */ // 如果定義關聯的時候沒有bind方法 /* array:4 [▼ "uid" => 1 "tid" => 3 "username" => "112" "profile" => array:4 [▼ "aid" => 1 "nickname" => "富商大賈" "money" => "10.00" "phone" => "123" ] ] */ ``` >[danger] 考慮沒有關聯到數據的情況 + 在模板中可以這樣使用 沒有關聯時 顯示空字符串 ~~~ {$v.nickname ?? ''} ~~~
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