baclight/app/models/id_card/print_data.rb

module IdCard
    class PrintData < ApplicationRecord

        STRING_ATTRIBUTES = %w[provider_line_1 provider_line_2 provider_line_3 provider_line_4 provider_line_5 provider_line_6 provider_line_7 provider_line_8 provider_line_9 provider_line_10 provider_line_11 provider_line_12 claim_to_1 claim_to_2 claim_to_3 claim_to_4 claim_to_5 claim_to_6 claim_to_7 claim_to_8 claim_to_9 claim_to_10 claim_to_11 claim_to_12 dependent_1 dependent_2 dependent_3 dependent_4 dependent_5 dependent_6 dependent_7 dependent_8 dental_coverage]

        before_validation :assign_blank_strings_to_unassigned_params

        def assign_blank_strings_to_unassigned_params
            STRING_ATTRIBUTES.each do |attr|
            # Use the blank? method which checks for nil, false, empty, or whitespace strings
            self[attr] = "" if self[attr].blank?
            end
        end
    end
end