CanCan 在能力配置期间出现问题？

Question

我是 CanCan 的新手，正在 Rails 4.2.0 中使用它。我设置了用户和管理员权限，并且在尝试设置与 Visitor_parking 模型对话的用户权限时在 abilitiy.rb 中设置 can 和 cannot 语句时遇到了问题。

我的能力.rb 文件看起来像：

class Ability
  include CanCan::Ability

  def initialize(user)

    if user.admin?
        #Grants Admin Permissions to Sites Model
        can :create, Site
        can :read, Site
        can :update, Site
        can :destroy, Site
        #Grants Admin Permissions to Residents Model
        can :create, Resident
        can :read, Resident
        can :update, Resident
        can :destroy, Resident
        #Grants Admin Permissions to Vehicles Model
        can :create, Vehicle
        can :read, Vehicle
        can :update, Vehicle
        can :destroy, Vehicle
        #Grants Admin Permissions to Parking Model
        can :create, Parking
        can :read, Parking
        can :update, Parking
        can :destroy, Parking
        #Grants Admin Permissions to Visitor Parking Model
        can :create, Visitor_parking
        can :read, Visitor_parking
        can :update, Visitor_parking
        can :destroy, Visitor_parking
        #Grants Admin Permissions to Trespass Model
        can :create, Trespass
        can :read, Trespass
        can :update, Trespass
        can :destroy, Trespass
        #Grants Admin Permissions to Reports Model
        can :create, Report
        can :read, Report
        can :update, Report do |report|
            report.user == user
        end
        cannot :destroy, Report
    else
        #Grants User Permissions to Sites Model
        cannot :create, Site
        can :read, Site
        cannot :update, Site
        cannot :destroy, Site
        #Grants User Permissions to Residents Model
        cannot :create, Resident
        can :read, Resident
        can :update, Resident
        cannot :destroy, Resident
        #Grants User Permissions to Vehicles Model
        cannot :create, Vehicle
        can :read, Vehicle
        can :update, Vehicle
        cannot :destroy, Vehicle
        #Grants User Permissions to Parking Model
        can :create, Parking
        can :read, Parking 
        can :update, Parking
        cannot :destroy, Parking
        #Grants User Permissions to Visitor Parking Model
        ##can :create, Visitor_parking
        ##can :read, Visitor_parking
        ##can :update, Visitor_parking
        ##cannot :destroy, Visitor_parking
        #Grants User Permissions to Trespass Model
        can :create, Trespass
        can :read, Trespass
        cannot :update, Trespass
        cannot :destroy, Trespass
        #Grants User Permissions to Reports Model
        can :create, Report
        can :read, Report
        can :update, Report do |report|
            report.user == user
        end
        cannot :destroy, Report

    end

我知道有些人会说我应该使用 can can 的管理所有功能，但是在管理部分也会有规则，所以我想把它全部 CRUD 并根据需要进行更改。

问题在于上述代码的用户（其他）部分。 （用 ## 注释掉的部分）管理员权限可以正常工作，但是当我尝试设置用户权限时，我收到以下错误并且不知道该去哪里。

我得到的错误信息：

Unable to autoload constant Visitor_parking, expected /Users/TaurenLTD1/Desktop/PatrolPro/Patrol/app/models/visitor_parking.rb to define it

    cannot :destroy, Parking
        #Grants User Permissions to Visitor Parking Model
      -->  can :create, Visitor_parking is what is hilighted red in the error message (but matches the admin perfectly)??? --->
        can :read, Visitor_parking
        can :update, Visitor_parking
        cannot :destroy, Visitor_parking

这就是完整的 VisitorParking 模型的样子

class VisitorParking < ActiveRecord::Base

  # Adds Relationships to Visitor Parking
  belongs_to :user
  belongs_to :site

  # Adds Import / Export Functionality To Reports
   def self.import(file)
    CSV.foreach(file.path, headers: true) do |row|
      VisitorParking.create! row.to_hash
    end
  end

  def self.to_csv
    CSV.generate do |csv|
      csv << column_names
      all.each do |visitor_parking|
        csv << visitor_parking.attributes.values_at(*column_names)
      end
    end
  end

end

我有点像 Rails 爱好者，这是我第一次使用 cancan，所以这可能是一些小事，我只是没有接受......任何帮助都非常感谢！

Answer 1

你拼错了VisitorParking：Visitor_parking。尝试修复它。

说实话，我不确定它如何在您的条件的 if 分支中工作。