这是我的
$art = Article::where('id',$article)->firstOrFail();
$products = $art->products;
我只是想限制'产品'这是错误的方式
$products = $art->products->offset($offset*$limit)->take($limit)->get();
请帮我一把!
谢谢!
skip = OFFSET
$products = $art->products->skip(0)->take(10)->get(); //get first 10 rows
$products = $art->products->skip(10)->take(10)->get(); //get next 10 rows
来自laravel doc 5.2 https://laravel.com/docs/5.2/queries#ordering-grouping-limit-and-offset
跳过/拿走
要限制查询返回的结果数,或跳过查询中的给定数量的结果(OFFSET),您可以使用skip和take方法:
$users = DB::table('users')->skip(10)->take(5)->get();
在laravel 5.3你可以写(https://laravel.com/docs/5.3/queries#ordering-grouping-limit-and-offset)
$products = $art->products->offset(0)->limit(10)->get();
laravel有自己的功能skip
为offset
和take
为limit
。就像下面的laravel查询示例: -
Article::where([['user_id','=',auth()->user()->id]])
->where([['title','LIKE',"%".$text_val."%"]])
->orderBy('id','DESC')
->skip(0)
->take(2)
->get();
你可以使用skip
和take
函数如下:
$products = $art->products->skip($offset*$limit)->take($limit)->get();
// skip
应该作为整数值传递param以跳过记录并开始索引
// take
得到一个整数值来得到no。启动skip
定义的索引后的记录
编辑
抱歉。我被你的问题误解了。如果你想要像分页一样的东西,forPage
方法将适合你。 forPage方法适用于集合。
REf : https://laravel.com/docs/5.1/collections#method-forpage
e.g
$products = $art->products->forPage($page,$limit);
Laravel有一个快速分页方法,即paginate,它只需要传递每页显示的数据量。
//use the paginate
Book::orderBy('updated_at', 'desc')->paginate(8);
你可以使用这些方法:offset
,limit
,skip
,take
例如:
Model::offset(0)->limit(10)->get();
Model::skip(3)->take(3)->get();
//i use it in my project, work fine ~
class BookController extends Controller
{
public function getList(Request $request) {
$page = $request->has('page') ? $request->get('page') : 1;
$limit = $request->has('limit') ? $request->get('limit') : 10;
$books = Book::where('status', 0)->limit($limit)->offset(($page - 1) * $limit)->get()->toArray();
return $this->getResponse($books, count($books));
}
}
也许这个
$products = $art->products->take($limit)->skip($offset)->get();
试试这个示例代码:
$art = Article::where('id',$article)->firstOrFail();
$products = $art->products->take($limit);
$collection = collect([1, 2, 3, 4, 5, 6, 7, 8, 9]);
$chunk = $collection->forPage(2, 3);
$chunk->all();
请尝试这样,
return Article::where('id',$article)->with(['products'=>function($products, $offset, $limit) {
return $products->offset($offset*$limit)->limit($limit);
}])