同时在具有相同记录的两个数据库中创建设计用户

Question

我正在使用 rails 4 并想集成一些外部 api，为此我有一种情况，我必须同时在两个具有相同记录的数据库中创建用户。

我正在为这个 Rails 应用程序使用 Devise，到目前为止，我已完成以下操作以将用户记录保存在另一个数据库中：

config/database.yml

development:
  adapter: mysql2
  encoding: utf8
  database: test_openmeetings_development
  pool: 5
  username: root
  password: root
  socket: /var/run/mysqld/mysqld.sock

openmeetings_dev:
  adapter: mysql2
  encoding: utf8
  database: openmeetings
  pool: 5
  username: root
  password: root
  socket: /var/run/mysqld/mysqld.sock

models/User.rb

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
    :recoverable, :rememberable, :trackable, :validatable, :confirmable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :new_password, :firstname, :lastname, :username, :email, :password, :password_confirmation, :remember_me, :confirmation_token
  attr_accessor :new_password

  # creating user record to another database just after Devise user is created
  after_create :save_to_openmeetings


  def save_to_openmeetings    
    user = last_user

    ActiveRecord::Base.establish_connection("openmeetings_dev").connection
    sql = "INSERT INTO users (firstname, lastname, login) VALUES ('#{user.firstname}', '#{user.lastname}', '#{user.email}')"
    connection.execute(sql)

    # reconnect database to original state
    ActiveRecord::Base.establish_connection("#{Rails.env}").connection
  end  

  def last_user
    User.last
  end
end

问题 1.虽然它在两个数据库中正确创建用户（来自控制台日志），但我面临的问题是，数据存在于另一个数据库中（openmeetings）但该数据不存在于我的原始数据库中（test_openmeetings_development）

1. 连接未重置回原始数据库 (test_openmeetings_development)

可能是我在做什么都不是一个好主意，所以，请分享我可以解决我的问题的逻辑。或者请让我知道我在这段代码中缺少什么（为什么它不起作用？）

谢谢

Answer 1

所有其他配置相同，更改如下：

1) 在after_create回调中的openmeeting数据库中创建用户

models/user.rb

class User < ActiveRecord::Base
 # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
    :recoverable, :rememberable, :trackable, :validatable, :confirmable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :new_password, :firstname, :lastname, :username, :email, :password, :password_confirmation, :remember_me, :confirmation_token
  attr_accessor :new_password

  # creating user record to another database just after Devise user is created
  after_create :save_to_openmeetings

  def save_to_openmeetings
    OpenMeeting.create_user(self)
  end
end

2) 创建models/open_meeting.rb

class OpenMeeting < ActiveRecord::Base

  # override establish_connection method
  def self.establish_connection
    super(:openmeetings_dev)
  end

  # create connection to your new database for me ```:openmeetings_dev```
  establish_connection


  def self.create_user(user)
    firstname = "#{ActiveRecord::Base::sanitize(user.firstname)}" # escape sql injection
    lastname = "#{ActiveRecord::Base::sanitize(user.lastname)}" # escape sql injection
    login = "#{ActiveRecord::Base::sanitize(user.email)}" # escape sql injection
    password = "#{ActiveRecord::Base::sanitize(user.new_password)}" # escape sql injection

    sql = ("INSERT INTO users (firstname, lastname, login, password) VALUES ('#{firstname}', '#{lastname}', '#{login}', '#{password}')")
    connection.execute(sql)   # execute create sql statement
  end

end

这个解决方案对我有用，但我认为，可能有比这更好的解决方案，所以，如果有任何新的解决方案，请发布此问题

谢谢