Ruby on rails 如何获取FactoryGirl模型属性与has_和_-belish_有多个关联？

我正试图通过HABTM协会获取（：trip）的

FactoryGirl.attributes\u:countries

，因为控制器测试失败-

：countries

在

：trip

属性中缺席）：

TripsController：

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

出行模式：

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

---

尝试了以下操作：，但没有用。

检查您的请求中是否确实发送了任何

国家/地区ID

---

请使用（：trip）

的

attributes\u值更新您的帖子，以下是答案和解释：

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\u for（：trip）
返回

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

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

我曾经尝试使用has_和_besive_to _manyfor many to many，但曾经遇到过各种问题。我发现使用它会使设置更容易。本教程可能会有帮助：嗨，Alexey，问题不在Controller中，而是在FactoryGirl.attributes\u中。实际上，我的意思是，在这行代码中，{post:create，trip:attributes\u for（：trip）}

之前，

没有发送
国家ID，但我还不够确定。很高兴你自己解决了。
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

{
  :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

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