如果我的用户具有特定角色，则无法在 Rails 中重定向

Question

我正在使用 Rails 4.2.3。我想为我的用户分配角色，所以我在 app/model/users.rb 文件中有这个…

class User < ActiveRecord::Base
  has_many :assignments
  has_many :roles, through: :assignments

  def role?(role)
    roles.any? { |r| r.name.underscore.to_sym == role }
  end

  def admin?
    role? "Admin"
  end
end

但是当我用我系统中唯一的用户登录时，我没有被重定向到管理页面（而是执行了下面的“else”子句......

  def create
    user = User.from_omniauth(env["omniauth.auth"])
    session[:user_id] = user.id
    if user.admin?
      render 'admin/index'
    else
      redirect_to root_path
    end
end

我不明白这是为什么。以下是我的 PostGres 数据库中目前唯一的数据……

myproject=> select * FROM Assignments;
 id | user_id | role_id |         created_at         |         updated_at         
----+---------+---------+----------------------------+----------------------------
  4 |       8 |       1 | 2016-05-10 21:15:01.863456 | 2016-05-10 21:15:01.863456
(1 row)

myproject=> select * FROM users;
 id |   provider    |          uid          |     name      | oauth_token | oauth_expires_at |         created_at         |         updated_at         |          email          
----+---------------+-----------------------+---------------+-------------+------------------+----------------------------+----------------------------+-------------------------
  8 | google_oauth2 | 177611649021871409999 | Dave A        |             |                  | 2016-05-10 21:15:01.861259 | 2016-05-10 21:15:01.861259 | myemail@gmail.com
(1 row)

myproject=> select * FROM roles;
 id | name  |         created_at         |         updated_at         
----+-------+----------------------------+----------------------------
  1 | Admin | 2016-04-28 19:55:43.473016 | 2016-04-28 19:55:43.473016
  2 | User  | 2016-04-28 19:55:43.492222 | 2016-04-28 19:55:43.492222

Answer 1

您正在将字符串 "Admin" 传递给 role?，但在传递给 roles.any? 的块中，您正在匹配一个符号。这应该有效：

def role?(role)
  roles.any? { |r| r.name.underscore.to_sym == role.to_s.underscore.to_sym }
end

用这个你可以将 "Admin"、"admin" 或 :admin 传递给 role?

如果我的用户具有特定角色，则无法在 Rails 中重定向

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