测试康康舞能力并获取MassAssignmentSecurity :: Error

问题描述

我已经实现了康康，并且想按照康康Wiki上的建议测试功能。我试图复制用户只能销毁他拥有的项目。

I have implemented cancan and would like to test abilities as recommended on the cancan wiki. I trying to replicate "user can only destroy projects which he owns."

spec / models / ability_spec.rb：

spec/models/ability_spec.rb:

require "cancan/matchers"
require 'spec_helper'

describe Ability do
  context "user is investigator" do
    it "user can only destroy projects which he owns" do
        user = FactoryGirl.create(:user)
        ability = Ability.new(user)
        ability.should be_able_to(:destroy, Project.new(:user => user))
    end
  end
end

但是我得到了：

ActiveModel::MassAssignmentSecurity::Error:
       Can't mass-assign protected attributes: user

型号：

class User < ActiveRecord::Base
  has_many :projects, dependent: :destroy          
  devise :database_authenticatable, etc...         
  attr_accessible :email, :password, :password_confirmation, :remember_me, :locale 
  validates :role, :presence => true
end

class Project < ActiveRecord::Base
  belongs_to :user
end

工厂：

FactoryGirl.define do
  factory :user do |f|                        
    f.email { Faker::Internet.email }
    f.password "secret"
    f.role 1
  end
end

我理解为什么会出现此错误，并尝试了各种解决方法，但是对工厂的理解不足它。您能帮忙吗？

I understand why this error arrises, and have tried various ways round it, but don't have a good enough understanding of factories to crack it. Can you help?

推荐答案

因此，问题与创建项目时不使用Factory Girl有关。应该是这样：

So the problem was related to not using Factory Girl when creating the project. It should have been:

describe Ability do
  context "user is investigator" do
    it "user can only destroy projects which he owns" do
        user = FactoryGirl.create(:user)
        ability = Ability.new(user)
        ability.should be_able_to(:destroy, FactoryGirl.create(:project, :user => user))
    end
  end
end

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