Rails SystemStackError：堆栈级别太深

Question

我正在使用 rspec capybara 和 factory girl 测试我的应用程序 (Rails 5) 我有以下错误... 我不确定发生了什么...我对 rspec 很陌生，希望您能帮助我:) 谢谢

Randomized with seed 41137

An error occurred in a `before(:suite)` hook.
Failure/Error: FactoryGirl.lint

SystemStackError:
  stack level too deep

你会在下面找到我的代码：

工厂.rb

FactoryGirl.define do
  factory :event do
    name {Faker::Friends.character}
    total_price 50
    participant
  end

  factory :participant do
    first_name { Faker::Name.first_name }
    salary 900
    event
  end
end

事件.rb

class Event < ApplicationRecord
  has_many  :participants, inverse_of: :event
  validates :participants, presence: true
  validates :name, presence: true, length: {minimum: 2}
  validates :total_price, presence: true


  accepts_nested_attributes_for :participants, reject_if: :all_blank, allow_destroy: true

  def total_salary
    all_salary = []
    participants.each do |participant|
      all_salary << participant.salary
    end
    return @total_salary = all_salary.inject(0,:+)
  end
end

event_spec.rb

require 'rails_helper'

describe Event do
  it { should have_many(:participants) }
  it { should validate_presence_of(:participants) }
  it { should validate_presence_of(:name) }
  it { should validate_presence_of(:total_price) }

  describe "#total_salary" do
    it "should return the total salary of the participants" do
      partcipant_1 = create(:participant, salary: 2000)
      partcipant_2 = create(:participant, salary: 3000)

      expect(partcipant_1.salary + partcipant_2.salary).to eq(5000)
    end
  end
end

编辑

在我的参与者模型中，我必须添加 optional: true belongs_to :event, option: true

所以 fabriciofreitag 建议效果很好:)

Answer 1

让我们看看你的工厂：

FactoryGirl.define do
  factory :event do
    name {Faker::Friends.character}
    total_price 50
    participant
  end
  factory :participant do
    first_name { Faker::Name.first_name }
    salary 900
    event
  end
end

在这种情况下，事件的创建将创建一个参与者，该参与者将创建一个事件，该参与者将创建一个参与者。以此类推，在无限循环中（堆栈级别太深）。

也许你可以把它改成这样：

FactoryGirl.define do
  factory :event do
    name {Faker::Friends.character}
    total_price 50
    participants { create_list(:participant, 3, event: self) }
  end
  factory :participant do
    first_name { Faker::Name.first_name }
    salary 900
  end
end