Ruby on Rails

Robert Walker wrote in post #1150810:
> Ruby has a mechanism for this. They are called "gems", libraries of
> shared code.

So you are suggesting to write a gem for this????? I would have not
expected this suggestion, but I will think about it.

> Rails provides a "lib" directory for code more tightly
> coupled with the application in which they are used.

I have noticed the lib directory, but I was a bit reluctant to use it,
because - if I understand it right - whenever I change something in a
file below lib, I would have to restart the rails server, which is
inconvenient during development.

> If you do have
> model classes that are not subclasses of ActiveRecord there's still no
> reason they can't live inside the models directory along side your
> ActiveRecord subclasses.

Shouldn't there (in models) be only classes related to - well -
"modelling", i.e. related to a data model? For example, if I have a
class which represents a connection to separate processes (say, a proxy
to a Clearcase server), this wouldn't fit well to the other stuff in the
model directory.

> Ruby also provides modules and mix-ins for adding functionality to
> existing classes, this can often be a good way to implement utility
> methods.

I guess you mean the files in helpers? Yes, this one I use already for
various utility functions, but helpers usually are targeted for views (I
*can* make them available in controllers, but they still would be
available in views too).

I see that there are several ways to do it. Could you also explain, why
my naive approach (to create a separate "lib" subdirectory below "app"
and put everything there) would be a bad idea? I have never seen someone
suggesting this, so I suspect it must have a drawback which I just don't
see yet.

Ronald

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