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class AddEnumerationsPosition < ActiveRecord::Migration
def self.up
add_column(:enumerations, :position, :integer, :default => 1) unless Enumeration.column_names.include?('position')
Enumeration.find(:all).group_by(&:opt).each_value do |enums|
enums.each_with_index do |enum, i|
# do not call model callbacks
Enumeration.update_all "position = #{i+1}", {:id => enum.id}
end
end
end
def self.down
remove_column :enumerations, :position
end
end
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