如何在laravel 5.8中使用relationship ajax？

namespace App;

use Illuminate\Database\Eloquent\Model;

class User extends Model
{
    public function posts()
    {
        return $this->hasMany('App\Post');
    }
}

namespace App;

use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
    public function user()
    {
        return $this->belongsTo('App\User');
    }
}

Route::get('/get-posts', 'PostController@getPosts');

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\User;

class PostController extends Controller
{
    public function getPosts(Request $request)
    {
        $userId = $request->input('user_id');
        $user = User::find($userId);
        
        if ($user) {
            $posts = $user->posts;
            return response()->json($posts);
        }
        
        return response()->json([]);
    }
}

$.ajax({
    url: '/get-posts',
    method: 'GET',
    data: {
        user_id: 1 // 传递用户的 ID
    },
    success: function(response) {
        // 处理返回的数据
        console.log(response);
    },
    error: function(xhr, status, error) {
        // 处理错误
        console.error(error);
    }
});