downcase.gsub(/[^a-z0-9]+/, "_")
end
# 12345678.to_s.with_commas => "12,345,678"
def with_commas
self.reverse.gsub(/\d{3}/,"\\&,").reverse.sub(/^,/,"")
end
end
Because these utility functions are usually widely applicable, it is useful to share
them between projects. I usually keep them under lib/extensions and require
them from an initializer.
ActiveRecord models
Some situations call for two or more separate applications sharing the same data.
While this is usually accomplished with one Rails application and judicious separation
of concerns, occasionally the purposes for the applications will diverge
and it will make sense to split them up. In that case, the models can be placed in
a shared_models directory and shared out among the applications.
Test fixtures
If you share a data model between applications, you will usually want to share
any test fixtures you have between those applications as well.
Rails Deployment
As a full-stack web framework, Rails can require some work to deploy an application
from the ground up. Rails, unfortunately, has a bad reputation for being hard to
deploy, mainly due to problems with the preferred deployment environments when
Rails was young (2004??“2005). But Rails has grown up, and Mongrel came along in
2006 and made things much easier. There are now good sets of best practices for
deploying Rails applications, from the smallest development environments to huge
multi-data-center worldwide clusters.
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