laravel - 如何获取每条评论的用户信息

Question

我有这些模型：

class Post extends Model
{
    protected $primaryKey = 'post_id';
    public function comments()
    {
        return $this->hasMany(Comment::class, 'post_id', 'post_id');
    }
}

class Comment extends Model
{
    protected $primaryKey = 'comment_id';

    public function post()
    {
        return $this->belongsTo(Post::class, 'post_id');
    }
}

class User extends Authenticatable
{
    protected $primaryKey = 'user_id';
    public function comments()
    {
        return $this->hasMany(Comment::class, 'user_id', 'commenter_id');
    }
}

class MyController extends Controller
{
    public function post($id = null)
    {
        $post = Post::where('post_id', $id)->first();
        $comments = $post->comments;
    }
}

我想要的是让每个评论的用户像$post->comments->user这样的东西，以便像下面这样轻松获取用户信息：

@foreach($post->comments as $comment)
    {{ $comment->user->first_name.' '.$comment->user->last_name }}
@endforeach

我怎样才能做到这一点？ 我想我需要一个名为hasManyThrough东西，但它太复杂了，我很困惑：|

Answer 1

是的，您可以使用注释对象获取用户对象，使用

$post = Post::with('comments.user')->where('post_id', $id)->first();

并在评论模型中为用户定义映射

class Comment extends Model
{
    protected $primaryKey = 'comment_id';

    public function post()
    {
        return $this->belongsTo(Post::class, 'post_id');
    }

    public function user()
    {
        return $this->belongsTo(User::class, 'user_id');
    }
}

Answer 2

只需在您的 Comment 模型中创建函数，该函数必须返回这样的关系

public function user()
{
    return $this->belongsTo(User::class, 'user_id');
}

然后在您的评论对象上调用此函数