Laravel - 分页和获取（）

Posted 2023-03-10

【中文标题】Laravel - 分页和获取（）

【英文标题】：Laravel - Paginate and get()

【发布时间】：2013-11-06 03:48:00

【问题描述】：

使用下面的代码，我想要的是对我创建的查询进行分页。但是，当我尝试在 get 之后添加分页时，它会引发错误。我想保持 get 因为我想限制在 $fields 上设置的列。 对这件事进行分页应该是什么更好的主意？或者什么是获取和限制列的好替代品？

我尝试了什么：

->get($this->fields)->paginate($this->limit)

我的控制器的一部分：

class PhonesController extends BaseController 

    protected $limit = 5;
    protected $fields = array('Phones.*','manufacturers.name as manufacturer');
    /**
     * Display a listing of the resource.
     *
     * @return Response
     */
    public function index()
    



        if (Request::query("str")) 
            $phones = Phone::where("model", 'LIKE', '%'. Request::query('str') . '%')
                        ->join('manufacturers', 'manufacturers_id', '=', 'manufacturers.id')
                        ->get($this->fields);

         else 
            $phones = Phone::join('manufacturers', 'manufacturers_id', '=', 'manufacturers.id')
                            ->get($this->fields);
        



        return View::make('phones.index')->with('phones', $phones);
    

【参考方案1】：

如果您查看method signature，您会看到 paginate 接收到第二个参数 $columns。所以你的解决方案是使用

->paginate($this->limit, $this->fields);

此外，您可以通过稍微改变一些东西来清理您的控制器：

public function index()


    $query = Phones::join('manufacturers', 'manufacturers_id', '=', 'manufacturers.id');

    if ( Request::query('str') ) 
        $query->where('model', 'LIKE', '%'. Request::query('str') . '%')
    

    $phones = $query->paginate($this->limit, $this->fields);

    return view('phones.index')->with('phones', $phones);

【参考方案2】：

class Servicios extends CI_Controller


    public function __construct()
    

        parent::__construct();

        header('Content-Type: application/json');
        if (!$this->lib_validaciones->validarSesion(FALSE))
        
            exit(json_encode(array("satisfactorio" => FALSE, "mensaje" => "NO TIENE SESSION ACTIVA")));
        
        $this->usuarioId = $this->session->userdata("usuarioId");
    

    public function index()
    
        exit();
    

    public function getPremios()
    
        $currentPage = $this->input->get("pag");

        \Illuminate\Pagination\Paginator::currentPageResolver(function () use ($currentPage)
        
            return $currentPage;
        );

        $this->load->model('Premio');

        $premios = Premio::where('activo', "TRUE")
                ->with(['Categoria' => function($q)
                    
                        $q->select('id', 'nombre');
                    ])
                ->with(['Imagenes' => function ($query)
                    
                        $query->where("activo", "TRUE");
                        $query->select(["imagenes.id", "imagenes.descripcion",
                            new Illuminate\Database\Query\Expression(
                                    "CONCAT('" . site_url(PATH_IMAGENES_UPLOAD) . "',imagenes.id,'.',imagenes.extension) as path")
                        ]);
                    ])
                ->with(['inventario'])
                ->withCount(['Favoritos', 'Favoritos AS favorito_usuario' => function ($query)
                    
                        $query->where("usuario_id", $this->usuarioId);
                    ])
                ->orderBy("nombre")
                ->paginate(3);

        $premios->setPath(site_url(uri_string()));
        $premios->setPageName("pag");

        exit(json_encode(array("satisfactorio" => TRUE, "premios" => $premios->toArray())));