Php 使用流明通过URL传递限制和偏移值

我对Resfully服务和Lumen（Laravel micro framework）是新手

我想将/books？limit=10&offset=5参数传递给控制器，并在json响应上设置它，但我不知道如何设置

web.php

$router->get('/books/', ['uses' => 'BooksController@index']);

 public function index()
{

  $books = PartnersBooks::where('is_direct', '=', 1)
      ->with('direct')
      ->whereHas('direct', function ($query) {
          $query->enable()
          ->select(['id', 'book_id', 'name', 'devices', 'flow', 'restrictions', 'countries', 'targeting']);
      })
      ->offset(5) // This should have an default value until the user pass a value through url
      ->limit(30) // This should have an default value until the user pass a value through url
      ->orderBy('id', 'asc')
      ->get(['id', 'category', 'description']);

      $status = !is_null($books) ? 200 : 204;
      return response()->json($books, $status);
}

BooksController.php

$router->get('/books/', ['uses' => 'BooksController@index']);

 public function index()
{

  $books = PartnersBooks::where('is_direct', '=', 1)
      ->with('direct')
      ->whereHas('direct', function ($query) {
          $query->enable()
          ->select(['id', 'book_id', 'name', 'devices', 'flow', 'restrictions', 'countries', 'targeting']);
      })
      ->offset(5) // This should have an default value until the user pass a value through url
      ->limit(30) // This should have an default value until the user pass a value through url
      ->orderBy('id', 'asc')
      ->get(['id', 'category', 'description']);

      $status = !is_null($books) ? 200 : 204;
      return response()->json($books, $status);
}

你能帮帮我吗

谢谢，

您可以使用该对象执行以下操作：

use Illuminate\Http\Request;


public function index(Request $request)
{
    $limit = $request->input('limit');
    $offset = $request->input('offset');

    $books = PartnersBooks::where('is_direct', '=', 1)
      ->with('direct')
      ->whereHas('direct', function ($query) {
          $query->enable()
            ->select(['id', 'book_id', 'name', 'devices', 'flow', 'restrictions', 'countries', 'targeting']);
      })
      ->offset($offset) // This should have an default value until the user pass a value through url
      ->limit($limit) // This should have an default value until the user pass a value through url
      ->orderBy('id', 'asc')
      ->get(['id', 'category', 'description']);

     $status = !is_null($books) ? 200 : 204;
     return response()->json($books, $status);
}

---

$request->input（）

也接受第二个参数作为默认值。因此，您可以这样设置默认值：

$offset=$request->input（'offset'，5）

。和极限类似。完成！非常感谢。