Rspec FactoryGirl has_many 通过得到 MissingAttributeError

Question

我有 has_many through 关系：

通过历史投票 has_many 投票者（用户）：

has_many :polls_through_history, through: :history, class_name: "Poll", foreign_key: "poll_id", source: :poll

和

has_many 通过历史记录投票（投票）的用户

has_many :users_through_history, through: :history, class_name: "User", foreign_key: 'user_id', source: :user

历史模型：

class History < ActiveRecord::Base
  belongs_to :user
  belongs_to :poll
  has_one :choice
end

历史规范：

require 'rails_helper'

RSpec.describe History, type: :model do
  before do  
    @poll_owner = FactoryGirl.create(:user)
    @voter = FactoryGirl.create(:user) 
    @poll = FactoryGirl.create(:poll, user: @poll_owner)
    @choice = @poll.choices[0]
    @history = FactoryGirl.create(:history, user: @voter, poll: @poll, choice: @choice) 
  end

  subject { @history }

  it { should respond_to(:user_id) }
  it { should respond_to(:poll_id) }
  it { should respond_to(:choice_id) }

  it { should belong_to(:user) }
  it { should belong_to(:poll) }
  it { should have_one(:choice) }
end

对于所有测试用例，我总是得到以下错误：

Failure/Error: @history = FactoryGirl.create(:history, user: @voter, poll: @poll, choice: @choice)
 ActiveModel::MissingAttributeError:
   can't write unknown attribute `history_id`

怎么了？

提前致谢。

Answer 1

根据错误消息，这是历史和选择模型之间关联的问题 - 您在 choice 上没有 history_id 列。正如您所提到的，在您的情况下拥有这样的列没有多大意义，因此您应该将 has_one 更改为 belongs_to 关联。

Rspec FactoryGirl has_many 通过得到 MissingAttributeError

Rspec FactoryGirl with has_many through got MissingAttributeError

activerecord

rspec

ruby-on-rails

ruby-on-rails-4

factory-bot