播种模型不适用于模型中的验证用户

Question

我的种子看起来像：

seeds.rb

seed_file = File.join(Rails.root, 'db', 'seed.yml')
config = YAML::load_file(seed_file)
Article.create(config["articles"])
User::HABTM_Articles.create(config["articles_users"])

seed.yml

articles:
  - status: 0
    title: First article
    body: Some awesome text

articles_users:
  - article_id: 1
    user_id: 1

我做rake db:drop && rake db:create && rake db:migrate.

然后运行 rake db:seed --trace 得到输出：

** Invoke db:seed (first_time)
** Execute db:seed
** Invoke db:abort_if_pending_migrations (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:abort_if_pending_migrations

我的Articletable是空的，但是Article::HABTM_Users是种子。

我发现问题出在 Article 模型中：

article.rb

class Article < ActiveRecord::Base
  has_and_belongs_to_many :users
  validates :title, presence: true, uniqueness: true
  validates :body, presence: true
  validates :users, presence: true #OK when remove this line
  enum status: [:publ, :priv]
end

删除 validates :users, presence: true 播种后效果很好。如何使用该用户存在验证进行播种运行？

Answer 1

问题是，在您创建文章时，它没有用户。我知道您的种子文件将用户列为 紧随其后的事情，但 ActiveRecord 对验证没有耐心！因此，您需要做的是在创建文章的同时创建 ArticleUsers，您可以通过以下几种方式完成：

将 article_users 定义推入您的 articles 定义：

articles:
  - status: 0
    title: First article
    body: Some awesome text
    user_ids: [ 1 ]

我做了一些测试，这应该确实有效：

irb(main):006:0> Thing.create(name: "thing1", user_ids: [ 1 ] ).users
  User Load (3.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" =  LIMIT 1  [["id", 1]]
  SQL (1.4ms)  INSERT INTO "things" ("name", "created_at", "updated_at") VALUES (, , ) RETURNING "id"  [["name", "thing1"], ["created_at", "2015-07-25 16:38:47.717614"], ["updated_at", "2015-07-25 16:38:47.717614"]]
  SQL (0.5ms)  INSERT INTO "things_users" ("user_id", "thing_id") VALUES (, ) RETURNING "id"  [["user_id", 1], ["thing_id", 2]]
=> #<ActiveRecord::Associations::CollectionProxy [#<User id: 1, name: "Bob", age: nil, created_at: "2015-07-25 16:37:13", updated_at: "2015-07-25 16:37:13">]>

使用 factories, which allow you to express a way to generate test objects more elegantly, a more robust fixture solution，或者只是将您的种子文件变成知道如何正确构建种子的 Ruby 脚本。

播种模型不适用于模型中的验证用户

Seeding model is not working with validatating user in model

ruby-on-rails

seeding