就像你可以第1部分回想起来的，这个由多个部分组成的系列文章覆盖了项目的第1个阶段：以一系列需求、一个参考架构和代码(理想的可重用的)为结果的概念的验证。
As you may recall from part 1, this multiple-part article covers Phase 1 of the project: a proof of concept resulting in a set of requirements, a reference architecture, and (ideally reusable) code.
如果要逐步添加代码，则需要从前一篇文章中使用的样例项目开始，这样常规的Ruby支持就已经就绪。
If you're following along, you will want to start with the sample project you used for the last article so that the regular Ruby support is already in place.
GridApplication项目包含了我们在本系列文章第二部分编写的特定于应用程序的代码。
The GridApplication project contains the application-specific code we wrote in Part 2.
应用推荐