Eloquent retationship: hasOne(one to one)

public function up()
    {
        Schema::create('posts', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('user_id')->unsigned();
            $table->string('title');
            $table->text('content');
            $table->timestamps();
        });
    }

$ php artisan migrate:refresh

Route::get('/basicinsert', function(){

	$post = new Post();

	$post->title = 'PHP post';
	$post->user_id = 1;
	$post->content = 'wow eloquent is really cool, look at this content';
	$post->save();
});

mysql> select * from posts;
+—-+———+———-+—————————————————+———————+———————+———-+————+
| id | user_id | title | content | created_at | updated_at | is_admin | deleted_at |
+—-+———+———-+—————————————————+———————+———————+———-+————+
| 2 | 1 | PHP post | wow eloquent is really cool, look at this content | 2019-12-06 07:04:25 | 2019-12-06 07:04:25 | 0 | NULL |
+—-+———+———-+—————————————————+———————+———————+———-+————+
1 row in set (0.00 sec)

User.php

namespace App;

use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable
{
    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

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

Route::get('/user/{id}/post', function($id){

	return	User::find(1)->post;
});

{“id”:2,”user_id”:1,”title”:”PHP post”,”content”:”wow eloquent is really cool, look at this content”,”created_at”:”2019-12-06 07:04:25″,”updated_at”:”2019-12-06 07:04:25″,”is_admin”:0,”deleted_at”:null}

userのモデル側にhasOneとしてるから、Post::find(4)->userだと表示されないのか??
あれ、これって、いわゆるエンティティリレーションモデルのこと??