Laravel 5.1: Eloquent relationship hasmany, Limit records - laravel-5

Question

I have a problem with Laravel 5.1: Eloquent relationship hasmany, Limit records I have 2 tables: feeds, comments. The request is to obtain 5 feeds and comments accordingly to each particular feed. I am currently using the below query:
public function getFeed($user_id){
return Feed::whereUserId($user_id)->with(['comments'])->take(10)->get()->map(function ($feed) {
$feed->comments = $feed->comments->take(5);
return $feed;
});
}
However, it returns all the comments.
My thinking was that the $feed->comments = $feed->comments->take(5); line doesn't work. I only want to get 5 comments for each feed, do you have any advise? Any comments are highly appreciated. Thank you!

Answer 1

It's better late than never, I was facing the same issue yesterday and ended up by sets the entire relations array on the model.
So in your case it will be like this:
return Feed::whereUserId($user_id)->take(10)->get()->map(function($feed) {
$feed->setRelation('comments', $feed->comments->take(5));
return $feed;
});

Answer 2

I was facing the same issue for over a month now. I just wanted to optimize the query because it was taking almost 1.5 sec to load desired data from 1 million records.
I leveraged Eloquent ORM Collection Load() method. This reduces the load time to just 300 ms.
In your case,
return Feed::whereUserId($user_id)
->get()
->each(function ($feed) {
$feed->load('comments')->take(5);
})
});

Answer 3

If it's something that will apply in all cases, you can adjust the relationship in the Feed model like this:
public function comments() {
return $this->hasMany('App\Comment')->limit(5);
}

Answer 4

$feed= Feed::whereUserId($userId)->with(['comments'])->get()->map(function ($query) {
$query->setRelation('comments', $query->comments->take(10));
return $query;
});

Answer 5

Feed::whereUserId($user_id)->with([
'comments' => function($query) {
// You should limit the comments by editing the
// relationships query not the main query.
$query->take(5);
}
])->take(10)->get();
This way you can limit the feed count you want and the comment count each feed has.

Answer 6

the take() eloquent method just adds 'limit' word at the end of the query. this type of query is more complex and isn't supported by vanilla eloquent.
fortunately, there is an additional package called eloquent-eager-limit, which helps with this problem. in order to make it work, install that package by using composer require staudenmeir/eloquent-eager-limit command and put use \Staudenmeir\EloquentEagerLimit\HasEagerLimit; line inside both parent and children model classes.

Answer 7

The error might be here
$feed->comments = $feed->comments->take(5);
Which should be
$feed->comments = $feed->comments->take(5)->get();
I will suggest you write in this way
$feed->load(['comments' => function($query){ return $query->take(5); }])