如何在 Laravel 5 中删除单条记录？

---

有多种方法可以实现。让我们测试一些示例，帮助我们删除 Laravel 中的单条记录。

假设我们创建了一个名为users的表，如下所示：

mysql> select * from users;
+----+---------------+------------------+--------------+------------+------+
| id |     name      |    email         |    password  |    address | age |
+----+---------------+------------------+--------------+------------+------+
| 1  |     Siya Khan | siya@gmail.com   | hgfdv3vhjd   |   Xyz      | 20  |
| 2  |    Rehan Khan | rehan@gmail.com  | cskjg367dv   |   Xyz      | 18  |
| 3  |    Rehan Khan | rehan@gmail.com  | dshjgcv2373h | testing    | 20  |
| 4  |         Rehan | rehan@gmail.com  |   abcd       | vci4hn4f4  | 15  |
| 5  | Nidhi Agarwal | nidhi@gmail.com  | fjh99302v    | abcd       | 20  |
| 6  | Ashvik Khanna | ashvik@gmail.com | 83bg44f4f    | oooo       | 16  |
| 7  |   Viraj Desai | viraj@gmail.com  | ppsdkj39hgb2 | test       | 18  |
| 8  |   Priya Singh | priya@gmail.com  | chjbbvgy3ij  | test123    | 20  |
+----+---------------+------------------+--------------+------------+------+

示例 1

可以使用find()方法，它接受一个键值作为参数，并返回具有给定键作为主键的模型。delete()方法删除当前记录。以下示例演示如何使用这两个方法删除记录：

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Models\User;

class UserController extends Controller {
   public function index() {
      $userDetails = User::find(9);
      $deleteuser = $userDetails->delete();
      if ($deleteuser) {
         echo "Record deleted from table successfully";
      } else {
         echo "Error in Deletion";
      }
   }
}

输出

以上代码的输出如下：

Record deleted from table successfully

示例 2

可以在 where 子句中添加条件，以从表中删除记录，如下所示：

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Models\User;

class UserController extends Controller{
   public function index() {
      $deleteuser = User::where('id', '=', 11)->delete();
      if ($deleteuser) {
         echo "Record deleted from table successfully";
      } else {
         echo "Error in Deletion";
      }
   }
}

输出

以上代码的输出为：

Record deleted from table successfully

示例 3

还可以使用destroy()方法从表中删除记录。

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Models\User;

class UserController extends Controller {
   public function index() {
      $deleteuser = User::destroy(12);;
      if ($deleteuser) {
         echo "Record deleted from table successfully";
      } else {
         echo "Error in Deletion";
      }
   }
}

输出

以上代码的输出为：

Record deleted from table successfully

示例 4

如果要一次删除多条记录，可以按如下所示操作：

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Models\User;

class UserController extends Controller{
   public function index() {
      $deleteuser = User::destroy([15,16,17]);
      if ($deleteuser) {
         echo "Record deleted from table successfully";
      } else {
         echo "Error in Deletion";
      }
   }
}

输出

以上代码的输出为：

Record deleted from table successfully