我在我的 Article 工厂收到以下测试失败，该工厂与我的 Categories 模型有 has_many through:, validates_presence_of 关系。类别需要在创建文章之前存在，所以我设置了一个 before(:create), create_list 挂钩来创建一些类别并将其与正在创建的文章相关联，但我收到以下失败。我也尝试过使用关联（例如关联：类别，工厂：：类别），但根据我所阅读的内容，我的模型所具有的关系（have_many :through）需要我使用 before(:create) 钩子. 我错过了什么？
Failures:
1) Factory Girl article factory is valid
**Failure/Error: expect(factory).to be_valid, lambda { factory.errors.full_messages.join("\n") }
Categories can't be blank**
# ./spec/support/factories_spec.rb:17:in `block (4 levels) in <top (required)>'
楷模
class User < ActiveRecord::Base
...
has_many :articles
...
end
class Article < ActiveRecord::Base
belongs_to :user
has_many :article_categories
has_many :categories, through: :article_categories
validates_presence_of :categories
...
end
class Category < ActiveRecord::Base
has_many :article_categories
has_many :articles, through: :article_categories
...
end
class ArticleCategory < ActiveRecord::Base
attr_accessor :article_id, :category_id
belongs_to :article
belongs_to :category
end
工厂
FactoryGirl.define do
factory :user do
name { Faker::Name.name }
email { Faker::Internet.email }
password 'GoodP@ssw0rd'
password_confirmation 'GoodP@ssw0rd'
user_name { Faker.bothify('??????????###') }
after(:create) do |user, evaluator|
create_list(:article, rand(1..3), user: user)
end
end
end
FactoryGirl.define do
factory :article do
title { Faker::Lorem.paragraph[0..(rand(11..63))] }
content { Faker::Lorem.paragraph[0..(rand(150..5000))] }
before(:create) do |article, evaluator|
create_list(:category, rand(1..3), article: article)
end
end
end
FactoryGirl.define do
factory :category do
name { Faker::Lorem.characters(10) }
end
end
FactoryGirl.define do
factory :article_category do
end
end