Laravel study notes (5) model, additions and deletions, soft deleted

Laravel model add, delete, change operation original
soft delete text

1. increase

   App\User::insert(
       ['email' => '[email protected]', 'votes' => 0]
   );
   
   \App\User::insert([
       ['email' => '[email protected]', 'votes' => 0],
       ['email' => '[email protected]', 'votes' => 0]
   ]);
   
   // 存在则不插入
   \App\User::insertOrIgnore([
       ['id' => 1, 'email' => '[email protected]'],
       ['id' => 2, 'email' => '[email protected]']
   ]);
   
   // 插入并返回ID
   $id = \App\User::insertGetId(
       ['email' => '[email protected]', 'votes' => 0]
   );
   # 注意：当使用 PostgreSQL 时，insertGetId 方法将默认把 id 作为自动递增字段的名称。如果你要从其他「序列」来获取 ID ，则可以将字段名称作为第二个参数传递给 insertGetId 方法。
   
   // 在这个例子中，我们把来自 HTTP 请求中的 name 参数简单地指定给 App\Flight 模型实例的 name 属性。当我们调用 save 方法时，就会添加一条记录到数据库中。created_at 以及 updated_at 时间戳将在 save 方法被调用时会被自动设置，因此我们不需要去手动设置它们
   $flight = new Flight;
   $flight->name = $request->name;
   $flight->save();
   

2. change

   $numbersOfRowsAffected = \App\User::where('id', 1)->update(['votes' => 1]);
   // 当通过模型批量更新时，saving, saved, updating, and updated 模型事件将不会被更新后的模型触发。这是因为批量更新时，模型从来没有被取回。
   
   // 搜索主键为1的数据并进行更新
   $flight = App\Flight::find(1);
   $flight->name = 'New Flight Name';
   $flight->save();
   
   # json
   \App\User::where('id', 1)->update(['options->enabled' => true]);
   
   App\User::increment('votes');        // update users set votes = votes+1       votes字段自增1
   \App\User::increment('votes', 5);        // update users set votes = votes+5       votes字段自增5
   \App\User::increment('votes', 1, ['name' => 'John']);        // update users set votes = votes+1 where name = John      votes字段自增1
   \App\User::decrement('votes');        // update users set votes = votes-1       votes字段自减1
   \App\User::decrement('votes', 5);       // update users set votes = votes-5      votes字段自减5
   

3. delete

   $numbersOfRowsAffected = \App\User::delete();
   $numbersOfRowsAffected = \App\User::where('votes', '>', 100)->delete();
   \App\User::truncate();
   
   
   $flight = App\Flight::find(1);  // 取回模型再删除
   $flight->delete();
   
   // 或者
   App\Flight::destroy(1);     // 直接删除
   App\Flight::destroy([1, 2, 3]);
   App\Flight::destroy(1, 2, 3);
   App\Flight::destroy(collect([1, 2, 3]));
   
   当使用 Eloquent 批量删除语句时，`deleting` 和 `deleted` 模型事件不会在被删除模型实例上触发。因为删除语句执行时，不会检索模型实例。
   

4. Soft-deleted
   first model to be used in SoftDeletestrait, which provides a range of related trait approach to soft delete specific reference source Illuminate \ Database \ Eloquent \ SoftDeletes, Moreover, you should set the $ date property array, which will placed deleted_at:

   use Illuminate\Database\Eloquent\SoftDeletes;
   
   class User extends Model
   {
       use SoftDeletes;
   
       protected $datas = ['deleted_at'];
   

   Delete usual manner (already soft-deleted data will then delete the Call to a member function delete () on null)

   //1、第一种方法
   Post::find(5)->delete();
   //2、第二种方法
   Post::destroy(5)
   //3、第三种方法
   Post::where('views', 0)->delete();
   

   Soft delete query needs to be called before a general inquiry withTrashed

   Post::withTrashed()->find('1');
   
   Post::withTrashed()->where('id','>',1)->get();
   
   Post::withTrashed()->all();
   

   Soft-deleted data recovery

   //恢复单个
   Post::withTrashed()->find(1)->restore();
   //恢复多个模型
   Post::withTrashed()->where('id','>',1)->restore();
   //恢复所有模型
   Post::withTrashed()->restore();
   

   Forced to delete

   //删除单个
   Post::withTrashed()->find(1)->forceDelete();
   //删除多个模型
   Post::withTrashed()->where('id','>',1)->forceDelete();
   //删除所有模型
   Post::withTrashed()->forceDelete();
   

   After the data is soft-deleted want the associated data to associated data, and needs later belongsTo withTrashed

   public function user()
   {
       return $this->belongsTo('App\User')->withTrashed();
   }