<?phpnamespace App;use Illuminate/Database/Eloquent/Model;class Admin extends Model{  //指定表名  protected $table = 'wd_user';  //指定允許批量復制的字段  protected $fillable = ['username'];  //指定id  protected $primaryKey = 'uid';  //自動維護時間戳  public $timestamps = true;  //獲取時間格式  protected function getDateFormat()  {    return time();  }  //獲取時間戳  protected function asDateTime($val)  {    return $val;  }}

public function orm(){  //查詢表的所有記錄  //$user = Admin::all();  //dd($user);  //查詢某一條記錄  //$user = Admin::find(2);  //dd($user);  //findOrFail() 根據主鍵查找，如果沒有找到就拋出異常  //$user = Admin::findOrFail(1);  //dd($user);  //查詢所有記錄  //$user = Admin::get();  //dd($user);  //增加條件查詢  //$user = Admin::where('uid','>=',4)->orderBy('uid','desc')->first();  //分段查詢  //Admin::chunk(2,function($user){    //var_dump($user);  //});  //聚合函數  //獲取記錄的條數  //$count = Admin::count();  //dd($count);  //獲取最大值  //$max = Admin::where('uid','>=',5)->max('age');  //使用模型新增數據  //$user = new Admin();  //$user-> username = 'haha';  //$bool = $user->save();  //dd($bool);  //獲取時間  //$user = Admin::find(1);  //echo date('Y-m-d H:i:s',$user->create_at);  //使用模型的Create方法新增數據  //$user = Admin::create(['username'=>'meimei']);  //dd($user);  //以屬性查找用戶，如果沒有則新增  //$user = Admin::firstOrCreate(['username'=>'imooc']);  //dd($user);  //以屬性查找用戶,如果沒有則新增，但不保存到數據庫  //$user = Admin::firstOrNew(['username'=>'imooc']);  //dd($user);  //通過模型更新數據  //$user = Admin::find(1);  //$user->username = 'jack';  //$bool = $user->save();  //dd($bool);  //增加條件  //$num = Admin::where('id','>','1')->update(['age'=>21]);  //dd($num);  //通過模型刪除  //$user = Admin::find(6);  //$bool = $user->delete();  //dd($bool);  //通過主鍵刪除  //$num = Admin::destroy(6);  //dd($num);  //刪除多條記錄  //$num = Admin::destroy(1,2,3);  //$num = Admin::destroy([1,2,3]);  //dd($num);  //增加條件的刪除操作  //$num = Admin::where('uid','>','4')->delete();  //dd($num);}