如何在Laravel关系中多次拥有相同的模型？

class User extends Model
{
    public function roles()
    {
        return $this->belongsToMany(Role::class);
    }

    public function adminRoles()
    {
        return $this->belongsToMany(Role::class)->where('role_type', 'admin');
    }

    public function editorRoles()
    {
        return $this->belongsToMany(Role::class)->where('role_type', 'editor');
    }
}

// User.php
class User extends Model
{
    public function roles()
    {
        return $this->belongsToMany(Role::class);
    }

    public function adminRoles()
    {
        return $this->belongsToMany(Role::class)->where('role_type', 'admin');
    }

    public function editorRoles()
    {
        return $this->belongsToMany(Role::class)->where('role_type', 'editor');
    }
}

// Role.php
class Role extends Model
{
    public function users()
    {
        return $this->belongsToMany(User::class);
    }
}

// 获取用户的普通角色
$user = User::find(1);
$roles = $user->roles;

// 获取用户的管理员角色
$adminRoles = $user->adminRoles;

// 获取用户的编辑角色
$editorRoles = $user->editorRoles;