Let’s say you have
named_scope :red, :conditions => {:color => 'red'}
Do not do this:
Shirt.red(:limit => 1) #=> ALL red shirts
You will get all red shirts. I don’t care how many you limit to, you will get them all. Instead, you need to chain using find(:all) or it’s alias all:
Shirt.red.all(:limit => 1) #=> ONE red shirt
This has been your Rails public service announcement for 17 September 2008.