lavavel 框架的增删改查 C层

class SugController extends Controller
{
    
    
    //添加数据
    public function add(Request $request){
    
    
        $data['sug_name'] = $request->name;
        $data['sug_radio'] = $request->radio;
        $data['sug_file'] = $request->file('file')->store('img');
        $data['sug_text'] = $request->text;
        if (SugModel::add($data)){
    
    
            return "<script>alert('数据添加成功')</script>".redirect()->action('SugController@show');
        }
    }


    //展示数据
    public function show(){
    
    
        $data =  SugModel::show();
        return view('show', ['data' => $data]);
    }

    //删除数据
    public function del($id){
    
    
     if ( SugModel::del($id)){
    
    
         return "<script>alert('数据删除成功')</script>".redirect()->action('SugController@show');
     }elseif (!empty($id)){
    
    
         return "<script>alert('id不能为空')</script>".redirect()->action('SugController@show');
     }
    }

    //修改数据
    public function updates($id){
    
    
      $data = SugModel::updates($id);
        return view('update', ['data' => $data]);
    }

    //开始修改数据
    public function up(Request $request){
    
    
        $data['sug_name'] = $request->name;
        $data['sug_radio'] = $request->radio;
        $data['sug_text'] = $request->text;
        $id = $request->id;
      if (  SugModel::up($data,$id)){
    
    
          return "<script>alert('数据修改成功')</script>".redirect()->action('SugController@show');
      }else{
    
    
          return "<script>alert('数据修改失败')</script>".redirect()->action('SugController@show');
      }
    }
}