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ruby on rails 3 reload using cached data
u = User.find(1)
u.first_name
#outputs bob

# manually change first_name for record 1 to jim with PGadmin or with rails console

u.reload
u.valid?
#outputs true
u.first_name
#outputs bob

#if i do this again
u = User.find(1)
#old data again
u.first_name
#outputs bob

#if i load data this way
u = User.where('id = 1').first
#new data
u.first_name
#outputs jim

ActiveRecord::Base.uncached do
  User.find(1)
end