【发布时间】：2012-11-02 21:16:53
【问题描述】：
我有一个带有users 表和user_profiles 表的应用程序。一个用户has_one 用户配置文件和一个用户配置文件belongs_to 一个用户。
我想确保关联场景始终为真，因此我对两个外键的存在进行了验证。问题是我遇到了“鸡和蛋”的情况。当我创建用户时，它不起作用，因为用户配置文件还不存在，当我创建用户配置文件时，它也不起作用，因为用户还不存在。所以我需要在创建用户的过程中创建用户配置文件。更复杂的是，当我创建客户端时，我还在after_create 回调中创建了一个用户。说够了（或读/写），这里有一些代码：
class User < ActiveRecord::Base
has_one :user_profile
validates :user_profile_id, presence: true
end
class UserProfile < ActiveRecord::Base
belongs_to :user
validates :user_id, presence: true
end
class Client < ActiveRecord::Base
after_create :create_client_user
private
def create_client_user
User.create!(
email: "admin@example.com",
password: "admin",
password_confirmation: "admin",
client_id: self.id
# I need to create a user profile dynamically here
)
end
end
有没有可能做我想做的事？
更新
我尝试了@cdesrosiers 建议的解决方案，但我的规格无法通过。我主要有三个错误。首先让我向您展示更新后的模型：
class User < ActiveRecord::Base
has_one :user_profile, inverse_of: :user
before_create { build_user_profile }
validates :user_profile, presence: true
def client=(client)
self.client_id = client.id
end
def client
current_database = Apartment::Database.current_database
Apartment::Database.switch
client = Client.find(self.client_id)
Apartment::Database.switch(current_database)
client
end
end
class UserProfile < ActiveRecord::Base
belongs_to :user
validates :user, presence: true
end
class Client < ActiveRecord::Base
attr_accessible :domain, :name
after_create :create_client_database
after_create :create_client_user
after_destroy :drop_client_database
# Create the client database (Apartment) for multi-tenancy
def create_client_database
Apartment::Database.create(self.domain)
end
# Create an admin user for the client
def create_client_user
Apartment::Database.switch(self.domain)
User.create!(
email: "admin@example.com",
password: "admin",
password_confirmation: "admin",
client: self
)
# Switch back to the public schema
Apartment::Database.switch
end
def drop_client_database
Apartment::Database.drop(self.domain)
end
end
我正在使用 FactoryGirl 创建工厂，这是我的工厂文件：
FactoryGirl.define do
factory :client do
sequence(:domain) { |n| "client#{n}" }
name Faker::Company.name
end
factory :user do
sequence(:email) { |n| "user#{n}@example.com"}
password "password"
password_confirmation "password"
client
#user_profile
end
factory :credentials, class: User do
email "user@example.com"
password "password"
end
factory :user_profile do
forename Faker::Name.first_name
surname Faker::Name.last_name
birthday (5..90).to_a.sample.years.ago
#user
end
end
如果我分别取消注释用户和用户配置文件工厂中的 user_profile 和 user 关联，我会得到一个 WARNING: out of shared memory。
现在，当我创建其中一个工厂时，我得到了以下三个错误之一：
Failure/Error: @user = create(:user)
ActiveRecord::RecordInvalid:
Validation failed: User profile A user profile is required
# ./app/models/client.rb:41:in `create_client_user'
# ./spec/controllers/users_controller_spec.rb:150:in `block (4 levels) in <top (required)>'
Failure/Error: create(:user_profile).should respond_to :surname
ActiveRecord::RecordInvalid:
Validation failed: User A user is required
# ./spec/models/user_profile_spec.rb:29:in `block (4 levels) in <top (required)>'
Failure/Error: let(:client) { create(:client) }
ActiveRecord::RecordInvalid:
Validation failed: User profile A user profile is required
# ./app/models/client.rb:41:in `create_client_user'
# ./spec/controllers/sessions_controller_spec.rb:4:in `block (2 levels) in <top (required)>'
# ./spec/controllers/sessions_controller_spec.rb:7:in `block (2 levels) in <top (required)>'
所以我假设 User 模型中的更改不起作用。另请注意，我从 users 表中删除了 user_profile_id。
【问题讨论】：
标签： ruby-on-rails associations belongs-to has-one