通过关联方式 follow 其他用户,创建时间和更新时间没有填充?

代码

class User  extends Authenticatable
{
    ...

    public function followers()
    {
        return $this->belongsToMany(User::class, 'followers', 'user_id', 'follower_id');
    }

    public function followings()
    {
        return $this->belongsToMany(User::class, 'followers', 'follower_id', 'user_id');
    }

    public function follow($user_ids)
    {
        if (!is_array($user_ids)) {
            $user_ids = compact('user_ids');
        }
        $this->followings()->sync($user_ids, false);
    }

    public function unfollow($user_ids)
    {
        if (!is_array($user_ids)) {
            $user_ids = compact('user_ids');
        }
        $this->followings()->detach($user_ids);
    }

    public function isFollowing($user_id)
    {
        return $this->followings->contains($user_id);
    }
}