Question

表是一个必须以不同方式映射到不同数据库/表的Mongoid模型

# app/models/table.rb
class Table
  include Mongoid::Document
end

# in app/controllers/some_controller.rb
def index
   Table.connection.database = :other_database # <- How to do this ???
   Table.table_name = params[:id] # <- How to do this ???
   @records = Table.all
end

我想要Table类：

根据当前登录用户的不同数据库（在同一mongodb服务器连接上）按请求配置
表格名称相同

修改
我知道：

 Mongoid.configure do |config|
   name = "control_development"
   host = "localhost"
   config.master = Mongo::Connection.new.db(name)
   config.slaves = [
  Mongo::Connection.new(host, 27018, :slave_ok => true).db(name)
   ]
   config.persist_in_safe_mode = false
 end

但是，它适用于某些型号（？）：

  # like this i mean
  class User
  include Mongoid::Document

  configure do |config| # configure only this model's connection
    name = "other_control_development"
    host = "localhost"
    config.master = Mongo::Connection.new.db(name)
    config.slaves = [
            Mongo::Connection.new(host, 27018, :slave_ok => true).db(name)
    ]
    config.persist_in_safe_mode = false
  end

 end

Answer 1

您可以使用此连接到多个数据库。

示例配置： https://github.com/mongoid/mongoid/blob/master/spec/config/mongoid_with_multiple_mongos.yml

在你的模特中：

set_database :secondary

您目前无法在运行时以您希望的方式交换数据库。这是在待办事项清单上，所以请留意它。

什么是Mongoid中的ActiveRecord＃establish_connection？

1 个答案: