Rails引擎在外键中出现问题

Question

我正在开发一个rails引擎，这是我的gem.gemspec

s.required_ruby_version = '>= 2.0.0'

s.add_dependency 'rails', '>= 4.2.0'
s.add_dependency 'enumerate_it'
s.add_dependency 'slim-rails'
s.add_dependency 'bootstrap-sass'
s.add_dependency 'jquery-rails'

s.add_development_dependency 'rdoc'
s.add_development_dependency 'tomdoc'
s.add_development_dependency 'sqlite3'
s.add_development_dependency 'rspec-rails'
s.add_development_dependency 'timecop'
s.add_development_dependency 'shoulda-matchers'
s.add_development_dependency 'factory_girl_rails'
s.add_development_dependency 'database_cleaner'
s.add_development_dependency 'awesome_print'
s.add_development_dependency 'guard'
s.add_development_dependency 'guard-rspec'
s.add_development_dependency 'guard-migrate'
s.add_development_dependency 'guard-livereload'
s.add_development_dependency 'thor'
s.add_development_dependency 'simplecov'
s.add_development_dependency 'codeclimate-test-reporter'

这是我的迁移文件，当我运行安装命令时，它将复制到我的rails应用程序：

class CreateMpaStorySchema < ActiveRecord::Migration
  def change
    create_table :mpa_story_archetypes do |t|
      t.string :name
      t.string :api_name
      t.string :api_key
      t.text :description
      t.integer :kind, index: true
      t.integer :tier, index: true
      t.integer :execution, index: true
      t.integer :interaction, index: true
      t.string :klass
      t.integer :expected_runtime

      t.timestamps null: false
    end

    create_table :mpa_story_adjacency_matrices do |t|
      t.references :archetype, index: true, foreign_key: true
      t.integer :kind, index: true
      t.integer :predecessor_id, index: true
      t.integer :successor_id, index: true
      t.integer :branch, default: 0

      t.timestamps null: false
    end

    create_table :mpa_story_instances do |t|
      t.integer :status, index: true
      t.text :artifacts

      t.timestamps null: false
    end

    create_table :mpa_story_instance_steps do |t|
      t.references :archetype, index: true, foreign_key: true
      t.references :instance, index: true, foreign_key: true
      t.integer :kind, index: true
      t.integer :elapsed_time

      t.timestamps null: false
    end

    create_table :mpa_story_instance_artifacts do |t|
      t.references :instance, index: true, foreign_key: true
      t.string :klass, index: true, foreign_key: true
      t.text :value

      t.timestamps null: false
    end

    create_table :mpa_story_protocol_parameters do |t|
      t.references :archetype, index: true, foreign_key: true
      t.integer :interaction, index: true
      t.string :klass
      t.integer :kind, index: true
      t.string :parameter

      t.timestamps null: false
    end

    create_table :mpa_story_archetypes_instances, id: false do |t|
      t.references :archetype, index: true, foreign_key: true
      t.references :instance, index: true, foreign_key: true
    end

    create_table :mpa_story_dynamic_routes do |t|
      t.references :archetype, index: true, foreign_key: true
      t.string :name
      t.text :actions

      t.timestamps null: false
    end

    create_table :mpa_story_dynamic_actions do |t|
      t.references :dynamic_route, index: true, foreign_key: true
      t.integer :kind, index: true
      t.string :name
      t.string :http_method

      t.timestamps null: false
    end

    create_table :mpa_story_business_rules do |t|
      t.references :archetype, index: true, foreign_key: true
      t.string :api_key, index: true

      t.timestamps null: false
    end

    create_table :mpa_story_notifications do |t|
      t.references :archetype, index: true, foreign_key: true
      t.string :api_key, index: true

      t.timestamps null: false
    end

    add_index :mpa_story_archetypes, :api_name, unique: true
    add_index :mpa_story_archetypes, :api_key, unique: true

    create_table :mpa_story_comments do |t|
      t.references :archetype, index: true, foreign_key: true
      t.string :name
      t.text :comment
      t.integer :parent_id, index: true
      t.integer :lft, index: true
      t.integer :rgt, index: true
      t.integer :depth

      t.timestamps null: false
    end
  end
end

在我的rails应用中，这是我的Gemfile

source 'https://rubygems.org'
# not used yet! source 'https://rails-assets.org'

ruby '2.2.1'

gem 'rails', '4.2.0'

# Front-end
gem 'sass-rails', '~> 5.0'
gem 'coffee-rails'
gem 'uglifier', '>= 1.3.0'
gem 'therubyracer', platforms: :ruby
gem 'jquery-rails'
gem 'turbolinks'
gem 'jbuilder', '~> 2.0'
gem 'bootstrap-sass', '~> 3.3.1.0'
gem 'autoprefixer-rails', '~> 4.0.2.2'

# View
gem 'simple_form', '~> 3.1.0'
gem 'responders', '~> 2.0.2'
gem 'slim-rails', '~> 3.0.1'
gem 'enumerate_it', '~> 1.2.3'

# Infra
gem 'pg', '~> 0.18.1'

# Auth
gem 'devise', '~> 3.4.1'
gem 'devise-i18n-views', '~> 0.3.3'

gem 'mini_magick'
gem 'refile', require: ['refile/rails', 'refile/image_processing']
gem 'aws-sdk', '< 2.0'
gem 'dotenv-rails'

# Association and form helpers
gem 'cocoon', '>= 1.2.6'
gem 'awesome_nested_set'

group :doc do
  gem 'sdoc', require: false
end

group :development, :test do

  # Tests
  gem 'parallel_tests'
  gem 'byebug'
  gem 'spring'
  gem 'better_errors'
  gem 'binding_of_caller'
  gem 'meta_request'
  gem 'quiet_assets'
  gem 'web-console', '~> 2.0'

  gem 'guard'
  gem 'guard-rspec'
  gem 'guard-bundler'
  gem 'guard-livereload'
  gem 'guard-migrate'

  gem 'foreman'

  gem 'rspec-rails', '~> 3.1.0'
  gem 'teaspoon', '~> 0.8.0'
  gem 'shoulda-matchers', '~> 2.7.0'
  gem 'fuubar', '~> 2.0.0'

  gem 'awesome_print'
  gem 'pry-rails'
end

group :test do
  gem 'capybara', '~> 2.4.4'
  gem 'capybara-screenshot', '~> 1.0.4'
  gem 'poltergeist', '~> 1.5.1'

  gem 'launchy', '~> 2.4.3'
  gem 'database_cleaner', '~> 1.4.0'
  gem 'factory_girl_rails', '~> 4.5.0'
  gem 'forgery', '~> 0.6.0'
  gem 'brazilian_forgery', git: 'https://github.com/internetsistemas/brazilian_forgery.git'

  gem 'simplecov', require: false
  gem 'codeclimate-test-reporter', require: false
end

group :production do
  gem 'rails_12factor'
end

我省略了引擎的路径，因为它是私有的。

嗯，这是我的问题，有了这个配置，当我运行我的迁移RAILS_ENV=test rake db:drop db:create db:migrate然后运行我的规范rspec一切正常。

但是当我尝试在我的4.2.1和gem.gemspec中更新我的引擎Gemfile时，这样：

gem.gemspec

s.required_ruby_version = '~> 2.2'

s.add_dependency 'rails', '>= 4.2.1'
s.add_dependency 'enumerate_it'
s.add_dependency 'slim-rails'
s.add_dependency 'bootstrap-sass'
s.add_dependency 'jquery-rails'

s.add_development_dependency 'rdoc'
s.add_development_dependency 'tomdoc'
s.add_development_dependency 'sqlite3'
s.add_development_dependency 'rspec-rails'
s.add_development_dependency 'timecop'
s.add_development_dependency 'shoulda-matchers'
s.add_development_dependency 'factory_girl_rails'
s.add_development_dependency 'database_cleaner'
s.add_development_dependency 'awesome_print'
s.add_development_dependency 'guard'
s.add_development_dependency 'guard-rspec'
s.add_development_dependency 'guard-migrate'
s.add_development_dependency 'guard-livereload'
s.add_development_dependency 'thor'
s.add_development_dependency 'simplecov'
s.add_development_dependency 'codeclimate-test-reporter'

Gemfile使用我的引擎的我的rails应用

gem 'rails', '4.2.1'

然后我为我的引擎和我的rails app运行bundle update。

当我运行RAILS_ENV=test rake db:drop db:create db:migrate时，迁移效果很好，但是当我尝试运行rspec时，我遇到了与外键相关的错误，如下所示：

== 20150416144229 CreateMpaStorySchema：迁移============================= - create_table（：mpa_story_archetypes）     - ＆GT; 0.2872s - create_table（：mpa_story_adjacency_matrices） 耙子流产了！ StandardError：发生错误，此以及所有后续迁移都已取消：

PG::UndefinedTable: ERRO:  relação "archetypes" não existe : 
ALTER TABLE    "mpa_story_adjacency_matrices" ADD CONSTRAINT     "fk_rails_2b6894b4f9"
FOREIGN KEY ("archetype_id")
REFERENCES "archetypes" ("id")

任何人都知道是否存在与rails 4.2.1和引擎相关的一些错误？

Answer 1

这是因为您的迁移正在生成一个带前缀的表：mpa_story_archetypes。

两种可能的解决方案：

1 - 当您使用引用方法时，明确声明您的表格......如：

t.references :mpa_story_archetype, index: true, foreign_key: true

2 - 自己添加foreign_key，删除 t.references 上的foreign_key选项并调用 add_foreign_key 方法：

add_foreign_key :mpa_story_adjacency_matrices, :mpa_story_archetypes, column: :archetype_id

我更喜欢解决方案2，你必须在每个有 foreign_key

的表中这样做