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Right now I have a simple form hooked up. Now that the form is smooth and functional, I want to add a feature that I''m not sure how to implement. After a user modifies a form, I''d like to have a visual cue appear somewhere to show that the form has been changed and needs to be saved. It could be a red div at the top of the screen - anything - it is doesn''t matter. Just

I tried to install Rails 3 Beta in my snow.leopard machine using the command below: (w/ sudo if it requires) gem install tzinfo builder memcache-client rack rack-test rack-mount erubis mail text-format thor bundler i18n unfortunately after 12 gems installed i got an error regarding builder-2.1.2 12 gems installed Installing ri documentation for tzinfo-0.3.22... Installing ri documentation for

I have an model Order and a model Customer. Each customer has_many Orders. Each Order belongs_to a Customer. If I create an order but don''t specify a Customer (for whatever reason, maybe it''s unknown at the time).. I obviously can''t access @order.customer.name because I''ll get a nil error... So what''s the right way to handle that? If the Customer is