Question

我必须在我的应用程序中使用两个数据库。我的 mongoid.yml ：

中有以下内容

development:
  # Configure available database sessions. (required)
  sessions:
    # Defines the default session. (required)
    default:
      # Defines the name of the default database that Mongoid can connect to.
      # (required).
      database: db_development
      username: myusername
      password: mypassword
      # Provides the hosts the default session can connect to. Must be an array
      # of host:port pairs. (required)
      hosts:
        - myserverip:27017
      databases:
        secondary:
          database: db2_development
          username: myusername
          password: mypassword
          # Provides the hosts the default session can connect to. Must be an array
          # of host:port pairs. (required)
          hosts:
           - myserverip:27018

在我的模型文件中：

class MyModel
   include Mongoid::Document
   store_in database: "secondary"
   field :name, type: String
   field :age, type: Integer
end

我在MyModel中有数据。当我尝试查询时，我发出以下错误：

Moped::Errors::QueryFailure (The operation: #<Moped::Protocol::Query
  @length=96
  @request_id=5
  @response_to=0
  @op_code=2004
  @flags=[:slave_ok]
  @full_collection_name="secondary.mymodel"
  @skip=0
  @limit=0
  @selector={"name"=>"Tom"}
  @fields=nil>
  failed with error 10057: "unauthorized db:secondary ns:secondary.mymodel lock type:0 client:10.100.55.40"

我尝试在线搜索但无法获得任何解决方案。任何帮助，将不胜感激。提前谢谢。

Answer 1

嗯，你能做到这一点好像你搞砸了你的yaml文件

development:
  sessions:
    default:
      database: db_development
      username: my_username
      password: my_password
      hosts:
        - myserverip:27017
      options:
        consistency: :eventual
    writeable:
      database: db2_development
      username: myusername2
      password  mypassword2
      hosts:
        -  myserverip2:27018
      options:
        consistency: strong

在你的模型中写下这个

store_in session: "writeable"

class MyModel
   include Mongoid::Document
   store_in session: "writeable"
   field :name, type: String
   field :age, type: Integer
end

仅供参考我从未使用password选项进行测试，但我猜它会起作用

希望这个帮助

Answer 2

为了临时（例如在脚本中）访问数据库，您可以使用MongoDB Ruby驱动程序：Tutorials-Documentation-Low Level Documentation

快速浏览：

连接到数据库：

client = Mongo::Client.new([ '127.0.0.1:27017' ], :database => 'my_db')

db = client.database

通过mongoDB查询语法查询条目：

db['collection_name'].find('field_name' => 'field_value')

连接两个数据库Mongoid

2 个答案: