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class AddCustomFieldsPosition < ActiveRecord::Migration
def self.up
add_column(:custom_fields, :position, :integer, :default => 1)
CustomField.all.group_by(&:type).each do |t, fields|
fields.each_with_index do |field, i|
# do not call model callbacks
CustomField.where({:id => field.id}).update_all("position = #{i+1}")
end
end
end
def self.down
remove_column :custom_fields, :position
end
end
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