在Laravel中如何将额外的数据传递给mutators和accessors [英] In laravel how to pass extra data to mutators and accessors
问题描述
我想做的是将每篇文章的评论附加到articles对象，但是问题是我每次都需要请求不同数量的评论.
What I'm trying to do is to append the comments of each article to the articles object, but the problem is that I need to request different number of comments each time.
出于某种原因，我为此需要使用 mutators ，因为有时我会请求50篇文章，并且我不想遍历结果并添加评论.
and for some reason I need to use mutators for that, because some times I request 50 articles and I don't want to loop through the result and append the comments.
因此可以执行以下操作以及如何传递额外的参数.
So is it possible to do something like the following and how to pass the extra argument.
此模型:
class Article extends Model
{
protected $appends = ['user', 'comments', 'media'];
public function getCommentsAttribute($data, $maxNumberOfComments = 0)
{
// I need to set maxNumberOfComments
return $this->comments()->paginate($maxNumberOfComments);
}
}
这是控制者:
class PostsController extends Controller
{
public function index()
{
//This will automatically append the comments to each article but I
//have no control over the number of comments
$posts = Post::user()->paginate(10);
return $posts;
}
}
我不想做的是:
class PostsController extends Controller
{
public function index()
{
$articles = Post::user()->all();
$number = 5;
User::find(1)->articles()->map(function(Article $article) {
$article['comments'] = $article->getCommnets($number);
return $article;
});
return Response::json($articles);
}
}
有更好的方法吗?因为我经常使用它，而且接缝不正确.
Is there a better way to do it? because I use this a lot and it does not seams right.
推荐答案
从Laravel源代码判断，不-不可能将额外的参数传递给该魔术访问器方法.
Judging from the Laravel source code, no – it's not possible to pass an extra argument to this magic accessor method.
最简单的解决方案是在类中添加另一个额外的方法，该方法确实接受您希望的任何参数-您可以使用该方法代替magic属性.
The easiest solution is just to add another, extra method in your class that does accept any parameters you wish – and you can use that method instead of magic property.
例如.只需将您的 getCommentsAttribute()重命名为 getComments()并触发-> getComments()而不是->评论在您看来，您很高兴.
Eg. simply rename your getCommentsAttribute() to getComments() and fire ->getComments() instead of ->comments in your view, and you are good to go.
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