正确使用 Laravel 的分页方法? [英] proper use of Laravel's paginate method?

问题描述

当我使用带有以下语句的 paginate 方法时:

When I use the paginate method with the following statement:

$user = User::where('id', 1)->first();
$images = $user->images->paginate(3);

我收到以下错误:

方法 Illuminate\Database\Eloquent\Collection::paginate 没有存在

Method Illuminate\Database\Eloquent\Collection::paginate does not exist

但是，当我使用以下语句调用它时:

However when I call it with the following statement:

$images = Image::where('user_id', $user->id)->paginate(3);

它相应地工作......我对Laravel相当陌生，所以请原谅我的无知，但结果差异的原因是什么?两个语句都不返回集合吗?

It works accordingly... I'm fairly new to Laravel, so forgive my ignorance, but what is the cause of the difference in results? Don't both statement return collections?

推荐答案

paginate 是查询构建器的一种方法，而不是集合.如果要对集合进行分页，则需要进行手动分页:

paginate is a method of the query builder not the collection. If you want to paginate the collection you need to do manual pagination:

$imagesPage = new LengthAwarePaginator($user->images->forPage($page,3), $user->images->count(), 3, $page); //Where $page is the current page number

或者，您可以对查询构建器进行分页:

Alternatively you can paginate the query builder:

$images = $user->images()->paginate(3); 

请注意，如果您使用第二种方法，则无需急切加载图像.

Note that if you use the 2nd approach you don't need to eager load the images.

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