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[web] Rails: Column accessor not defined, but works in console...

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I did a simple migration...
class AddAdminDesignationToUsers < ActiveRecord::Migration
  def self.up
    add_column :users, :is_admin, :boolean

  def self.down
    remove_column :users, :is_admin

Now, if I go into the rails console, I can load a user from the DB and I get correct results... u.is_admin? => false (or whatever). But if I use 'is_admin?' or 'is_admin' in a view or the controller itself, I get an error: 'undefined method `is_admin?' for #<User:0x47750ac>' Any ideas why? I've restarted the server, and everything else I could think of. Why would that work in the rails console (which uses the same environment, etc) but not in the app itself?

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