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class AddRolePosition < ActiveRecord::Migration
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def self.up
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add_column :roles, :position, :integer, :default => 1, :null => false
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Role.find(:all).each_with_index {|role, i| role.update_attribute(:position, i+1)}
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end
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def self.down
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remove_column :roles, :position
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end
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end
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