CanCan load_and_authorize_resource触发禁止的属性

Question

我有一个使用强参数的标准RESTful控制器.

class UsersController < ApplicationController
  respond_to :html, :js

  def index
    @users = User.all
  end

  def show
    @user = User.find(params[:id])
  end

  def new
    @user = User.new
  end

  def edit
    @user = User.find(params[:id])
  end

  def create
    @user = User.new(safe_params)

    if @user.save
      redirect_to @user, notice: t('users.controller.create.success')
    else
      render :new
    end
  end

  def update
    @user = User.find(params[:id])

    if @user.update_attributes(safe_params)
      redirect_to @user, notice: t('users.controller.update.success')
    else
      render :edit
    end
  end

  def destroy
    @user = User.find(params[:id])

    if current_user != @user
      @user.destroy
    else
      flash[:error] = t('users.controller.destroy.prevent_self_destroy')
    end
    redirect_to users_url
  end

  private

  def safe_params
    safe_attributes =
      [
        :first_name,
        :last_name,
        :email,
        :password,
        :password_confirmation,
      ]
    if current_user.is?(:admin)
      safe_attributes += [:role_ids]
    end
    params.require(:user).permit(*safe_attributes)
  end
end

在我的config/initializers我有文件strong_parameters.rb

ActiveRecord::Base.send(:include,  ActiveModel::ForbiddenAttributesProtection)

当我向CanCan添加一个简单的调用时,load_and_authorize_resource我得到了

1) UsersController POST create with invalid params re-renders the 'new' template
 Failure/Error: post :create, user: @attr
 ActiveModel::ForbiddenAttributes:
   ActiveModel::ForbiddenAttributes
 # ./spec/controllers/users_controller_spec.rb:128:in `block (4 levels) in <top (required)>'

凡@attr在测试中被定义为

  before(:each) do
    @attr =
      {
        first_name: "John",
        last_name: "Doe",
        email: "user@example.com",
        password: "foobar",
        password_confirmation: "foobar"
      }
  end

在测试中,我已正确设置以登录用户并为他们提供管理员所需的角色,所以我知道不是这样.我不知道为什么这会导致ForbiddenAttributes触发.我确信这是我忽略的简单事情.有没有其他人遇到过这个问题并找到了解决方案呢？

Answer 1

我相信这是因为如果您没有使用before_filter预加载它,CanCan将为所请求的资源使用自己的getter方法.所以你可以将它添加到控制器,它应该工作:

class UsersController < ApplicationController
  before_filter :new_user, :only => [:new, :create]

  load_and_authorize_resource

  def new_user
    @user = User.new(safe_params)
  end
end

(然后对编辑/更新操作执行相同操作.)

Answer 2

before_filter do
  params[:user] = safe_params
end
load_and_authorize_resource