RSpec/FactoryGirl中有多个关联的“名称已被占用”

Question

我正在尝试运行非常基本的规格测试，并且因错误“名称已被占用”而失败。

更新属于用户谁拥有许多角色。

用户模型

# == Schema Information 
# 
# Table name: users 
# 
# id      :integer   not null, primary key 
# email     :string   default(""), not null 
# 

FactoryGirl.define do 
    factory :user_engineer, class: User do 
    id 1 
    email 'someone@somewhere.com' 
    roles {[FactoryGirl.create(:engineer)]} 
    end 
end 

角色模型

# == Schema Information 
# 
# Table name: roles 
# 
# id   :integer   not null, primary key 
# name  :string 
# description :text 
# 

FactoryGirl.define do 
    factory :engineer, class: Role do 
    id 3 
    name 'Engineer' 
    description 'He is the chosen one' 
    end 
end 

更新模型

# == Schema Information 
# 
# Table name: updates 
# 
# id   :integer   not null, primary key 
# content  :text 
# user_id  :integer 
# ticket_id :integer 
# 

FactoryGirl.define do 
    factory :update do 
    content "This is a test update" 
    association :user, factory: :user_engineer 
    end 
end 

update_spec.rb

require 'rails_helper' 

RSpec.describe Update, type: :model do 
    let(:update){ FactoryGirl.create :update } 
    it { expect(update).to be_valid } 
end 

这是错误：

Update 
    example at ./spec/models/update_spec.rb:19 (FAILED - 1) 

Failures: 

    1) Update 
    Failure/Error: roles {[FactoryGirl.create(:engineer)]} 

    ActiveRecord::RecordInvalid: 
     Validation failed: Name has already been taken 

我怎样才能通过测试？

编辑：通过添加序列行我建议，我得到的运行RAILS_ENV=test rake db:drop后出现以下错误：

1) Update 
    Failure/Error: roles {[FactoryGirl.create(:engineer)]} 

    ActiveRecord::RecordNotUnique: 
     PG::UniqueViolation: ERROR: duplicate key value violates unique constraint "roles_pkey" 
     DETAIL: Key (id)=(3) already exists. 
     : INSERT INTO "roles" ("id", "name", "description", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5) RETURNING "id" 

Answer 1

由于从你的错误很明显，你有一个uniq的验证上name属性，你应该再使用sequence技术。

FactoryGirl.define do 
    factory :engineer, class: Role do 
    id 3 
    sequence(:name) { |n| "Engineer-#{n}" } 
    description 'He is the chosen one' 
    end 
end 

Answer 2

尝试下面的代码，用户模型

FactoryGirl.define do 
    factory :user_engineer, class: User do 
    id 1 
    email 'someone@somewhere.com' 
    roles {[FactoryGirl.create(:engineer, name: "new_engineer")]} 
    end 
end 

由于是name属性的uniq约束，我认为你的测试数据库中已经有了一个工程师记录，它在第一次运行测试用例时增加了，所以最好在运行t之前或之后清楚地测试数据库est案件。

将以下代码块放在spec/rails_helper.rb文件中。

config.before(:suite) do 
    DatabaseCleaner.clean_with(:truncation) 
    end 

    config.after(:each) do 
    DatabaseCleaner.clean 
    end