使用一对多关系时如何获取集合中的第一项

Question

I have a little problem but it's frustrating me a lot.

I have two tables
1. users
2. posts

The user can have many posts and the post belongs to one user

My question : how to get the first post when typing the relation?

public function index() {
 $user = User::find(1); 

// here it will return all posts

$user->with('posts');

    return view('home.index',compact('user'));
}

By the way : i used closure but it didn't work ... it return all users with posts

public function index()
    {

        $user = User::find(1);


        $user = $user->with(['posts' => function ($query) {
            $query->first();
        }])->get();

        return $user ;
        return view('home.index',compact('user'));
    }

and the result is like that :

[
{
"id": 1,
"name": "Barney Walter",
"email": "wuckert.murphy@example.org",
"created_at": "2016-12-22 10:48:45",
"updated_at": "2016-12-22 10:48:45",
"posts": []
},
{
"id": 2,
"name": "Dr. Makenzie Rutherford",
"email": "estroman@example.com",
"created_at": "2016-12-22 10:48:45",
"updated_at": "2016-12-22 10:48:45",
"posts": []
},
{
"id": 3,
"name": "Ernesto Shanahan",
"email": "pwill@example.com",
"created_at": "2016-12-22 10:48:45",
"updated_at": "2016-12-22 10:48:45",
"posts": []
},
{
"id": 4,
"name": "Rosalinda Cartwright",
"email": "josefa.murazik@example.com",
"created_at": "2016-12-22 10:48:45",
"updated_at": "2016-12-22 10:48:45",
"posts": []
},
{
"id": 5,
"name": "Kyleigh Willms",
"email": "ddach@example.net",
"created_at": "2016-12-22 10:48:45",
"updated_at": "2016-12-22 10:48:45",
"posts": [
{
"id": 1,
"user_id": 5,
"name": "Malcolm Simonis",
"title": "Autem quidem quia earum ipsam. A a commodi id adipisci quia minima iste numquam. Eum eius odit porro veniam. Et iure occaecati sapiente minima et beatae. Labore eius labore accusamus sapiente sed eveniet accusamus.",
"is_published": 1,
"created_at": "2016-12-22 10:54:14",
"updated_at": "2016-12-22 10:54:14"
}
]
}
]

any help about that ... please !!

Answer 1

Try to use take() :

$user = User::with(['posts' => function ($query) {
            $query->orderBy('created_at', 'asc')->take(1);
        }])->first();

And orderBy('created_at', 'asc') will sort result, so you'll take the very first post.

Answer 2

Try this you will get just 1 post.

$user = User::with('posts')->first();
$user->setRelation('posts', $business->posts->take(1));

Answer 3

If you want a model object of post instead of collection then you can define a new hasOne relation in User model as:

public function post()
{
    return $this->hasOne('App\Post');
}

And then you can query it as:

$user = User::where('id', 1)->with('post')->first();