使用cancancan的未定義方法“ admin”

Question

class Ability
include CanCan::Ability

  user ||= User.new # guest user (not logged in)

  if user.admin
    can :manage, :all
  else
    can :read, :all
  end
end

我has_many through關聯使用has_many through 。 具有3個表-User，Role和UserRole。 UserRole表用於連接用戶和角色表。 在UserRole表中，我正在存儲user_id和role_id。 沒有名為admin的屬性。 如何更改以上代碼以檢查用戶是否為管理員？

Answer 1

考慮您的角色表具有字段“名稱”，並且其中包含一些內容（“ admin”，“ guest”等）

打開模型app / models / user.rb並在下面添加方法

def admin?
  self.roles.find_by_name('admin') ? true : false
  # since one user has many roles you should find by role name
  # whether it has role with name admin
  # if it find the record the method will return true 
end

在您的capability.rb中，您可以設置為關注

class Ability
include CanCan::Ability

  user ||= User.new # guest user (not logged in)

  if user.admin?    # I changed admin to admin? to match method above
    can :manage, :all
  else
    can :read, :all
  end
end