EmFi questions

EmFi answers

• Real time with Rails
• Using Rails models with accepts_nested_attributes_for
• Is validates_presence_of necessary if using validates_length_of?
• Order confirmation page in rails
• How to turn a single-site app into a mantainable multi-site app without code changes?
• Can Ruby print out time difference (duration) readily?
• Rails redirect_to "www.somewebsite.com" with GET/POST parameters?
• How/where to temporarily store ActiveRecord objects if not in session?
• rails - implementing a simple lock to prevent user's from editing the same data concurrently
• Prevent certain properties from being updated?