Laravel 5.2雄辩的hasOne关系不起作用

Question

I have relationship in my chat model

public function user() {
    return $this->hasOne(User::class,'id','writers_id');
}

And want to use it in my controller. I tryed many ways, but no one worked. Just giving last try example (result - blank page).

print_r($chat = Chat::where('id', 1)->first()->user);

Can anyone help me? Thanks! I don't really understand that Eloquent, used simple DB query maker before, however someone said that I should do every database stuff in model. Is it correct? Sorry about my poor English!

Answer 1

First as mentioned by @Vohuman

return $this->hasOne('App\User', 'id', 'writers_id');

And when using it:

Chat::where('id', 1)->first()->user()->first()->attribute

Answer 2

Look here: https://laravel.com/docs/master/eloquent-relationships#one-to-one

In App\\Chat.php :

public function writer()
{
    return $this->hasOne('App\User','id','writers_id');
}

to define the relation. Then in whatever controller:

At top:

use App\User;

and inside the method:

$writer = User::find($user_id)->writer;

to debug it add one line in front of the above line.

dd($user_id,User::find($user_id),$writer);