数据映射器连接池逻辑

问题描述

所以我试图在Rails 3.2.8应用程序中使用datamapper。

So I am trying to use datamapper inside my Rails 3.2.8 app.

我有一个 config / initializers / dm.rb 我在其中加载 database.yml

I have a config/initializers/dm.rb where I load the database.yml

hash = YAML.load(File.new("database.yml"))
DataMapper.setup(:default, hash[Rails.env])

我在database.yml文件中设置了 pool 属性，但是我注意到datamapper不使用它。它使用了这个神奇的数字 8 ，这个数字来自哪里？以及如何为datamapper配置池设置。

I have a pool property set in the database.yml file, but I noticed that datamapper does not use that. It has this magic number 8 which it uses, where is this number coming from? And how can I configure pool settings for datamapper.

推荐答案

恰好在DataMapper.finalize之后，将其添加到我的测试中（使用'sqlite3 :: memory：'）将池大小减小为1

just after DataMapper.finalize I add this for my tests ( with 'sqlite3::memory:' ) to reduce the poolsize to 1

class DataObjects::Pooling::Pool
  alias :initialize_old :initialize
  def initialize(max_size, resource, args)
    initialize_old( 1, resource, args)
  end
end

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