Question

我有一个接受invoice及其嵌套items的模型：

class Invoice < ActiveRecord::Base

  belongs_to :user
  has_many :items

  attr_accessible :number, :date, :recipient, :project_id, :items_attributes

  accepts_nested_attributes_for :items, :reject_if => :all_blank

end

我觉得用RSpec和FactoryGirl测试这个很困难。这就是我所拥有的：

describe 'POST #create' do

  context "with valid attributes" do

    it "saves the new invoice in the database" do
      expect {
        post :create, invoice: attributes_for(:invoice), items_attributes: [ attributes_for(:item), attributes_for(:item) ]
      }.to change(Invoice, :count).by(1)        
    end

  end

end

这是我在控制器中的创建操作：

def create
  @invoice = current_user.invoices.build(params[:invoice])
  if @invoice.save
    flash[:success] = "Invoice created."
    redirect_to invoices_path
  else
    render :new
  end
end

每当我运行此操作时，都会收到错误：Can't mass-assign protected attributes: items

有人可以帮我解决这个问题吗？

...谢谢

Answer 1

首先：items是嵌套的，所以它们在params中的名称是items_attributes。改变它。

第二：嵌套意味着......嵌套！

基本上，替换：

post :create, invoice: attributes_for(:invoice, items: [ build(:item), build(:item) ])

使用：

post :create, invoice: { attributes_for(:invoice).merge(items_attributes: [ attributes_for(:item), attributes_for(:item) ]) }

SideNote，你在这里做一个真正的集成测试，你可以存根来保持单元测试。

Answer 2

我遇到了同样的问题所以我创建了一个补丁，它将FactoryGirl.nested_attributes_for方法添加到FactoryGirl：

module FactoryGirl
  def self.nested_attributes_for(factory_sym)
    attrs = FactoryGirl.attributes_for(factory_sym)
    factory = FactoryGirl.factories[factory_sym]
    factory.associations.names.each do |sym|
      attrs["#{sym}_attributes"] = FactoryGirl.attributes_for sym
    end
    return attrs
  end
end

所以现在你可以打电话：

post :create, invoice: FactoryGirl.nested_attributes_for(:invoice) }

你将获得所有嵌套形式的善良，你知道并喜欢：）

（要应用补丁，您需要将我的答案顶部的代码复制到config / initializers文件夹中的新文件中）

如何使用嵌套属性和FactoryGirl测试Rails创建操作？

2 个答案: