ruby-on-rails - 如何获取具有 has_and_belongs_to_many 关联的 FactoryGirl 模型属性？

Question

我正在尝试使用 HABTM 关联 :countries 获取 FactoryGirl.attributes_for(:trip) 因为 Controller 测试失败 - :countries 不存在在 :trip 属性中:

旅行 Controller :

class TripsController < ApplicationController
  def create
    trip = Trip.new(create_params)
    if trip.save
      redirect_to trips_path, notice: 'Trip successfully created.'
    else
      redirect_to :back, alert: trip.errors.full_messages.join('<br>').html_safe
    end
  end

  def create_params
    params.require(:trip).permit(:end_date, :description, country_ids: [], countries: [])
  end
end

RSpec TripsController 测试:

describe TripsController do
  describe 'POST #create' do
    before { post :create, trip: attributes_for(:trip) }
    it { is_expected.to redirect_to trips_path }
  end
end

行程模型:

class Trip < ActiveRecord::Base
  # Associations
  has_and_belongs_to_many :countries

  #Validations
  validate :require_at_least_one_country

  private

  def require_at_least_one_country
    if country_ids.empty? && countries.count == 0
      errors.add(:base, 'Please select at least one country')
    end
  end
end

旅行工厂:

FactoryGirl.define do
  factory :trip do
    description  { Faker::Lorem.sentence }
    end_date  { DateTime.now + 1.day }

    after(:build) do |trip, evaluator|
      trip.countries << FactoryGirl.create(:country, :with_currencies)
    end
  end
end

gem 文件:

factory_girl_rails (4.5.0)

试过这个:http://makandracards.com/jan0sch/11111-rails-factorygirl-and-has_and_belongs_to_many , 但没用。

Answer 1

这是带有解释的答案:

FactoryGirl.define do
  factory :trip do
    description  { Faker::Lorem.sentence }
    end_date  { DateTime.now + 1.day }

    after(:build) do |trip, evaluator|
      trip.countries << FactoryGirl.create(:country, :with_currencies)
    end
  end
end

FactoryGirl.attributes_for(:trip) 返回

{
  :description=>"Eum alias tenetur odit voluptatibus inventore qui nobis.",
  :end_date=>Wed, 16 Sep 2015 11:48:28 +0300
}

.

FactoryGirl.define do
  factory :trip do
    description  { Faker::Lorem.sentence }
    end_date  { DateTime.now + 1.day }
    country_ids { [FactoryGirl.create(:country, :with_currencies).id] }
  end
end

FactoryGirl.attributes_for(:trip) 返回

{
  :description=>"Assumenda sapiente pariatur facilis et architecto in.", 
  :end_date=>Wed, 16 Sep 2015 11:45:22 +0300,
  :country_ids=>[4]
}