Rails本地服务器错误：没有这样的文件database.yml

I'm working on a project with another developer and I'm getting an error when trying to start my local server. Missing database.yml. I'm just using sqlite and another developer is using mongrel therefore I don't have a database.yml file. I'm not using Mongrel because I'm on ruby 1.9.2 and he is on ruby 1.8.7.I'm working on a project with another developer