Laravel框架模型的創(chuàng)建及模型對數(shù)據(jù)操作示例

?php
namespace 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(fù)制的字段
  protected $fillable = ['username'];
  //指定id
  protected $primaryKey = 'uid';
  //自動維護(hù)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(jù)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($user);
  //});
  //聚合函數(shù)
  //獲取記錄的條數(shù)
  //$count = Admin::count();
  //dd($count);
  //獲取最大值
  //$max = Admin::where('uid','>=',5)->max('age');
  //使用模型新增數(shù)據(jù)
  //$user = new Admin();
  //$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(shù)據(jù)
  //$user = Admin::create(['username'=>'meimei']);
  //dd($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(shù)據(jù)庫
  //$user = Admin::firstOrNew(['username'=>'imooc']);
  //dd($user);
  //通過模型更新數(shù)據(jù)
  //$user = Admin::find(1);
  //$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);
}