Separate getter, setter and attribute value

[schmijos]

I tried something like this:

CleanShot.2024-11-15.at.12.40.27.mp4

class Row < ApplicationRecord
  [*"A".."Z"].each do |letter|
    define_method(letter) do
      evaluate(self[letter])
    end

    define_method("#{letter}=") do |value|
      self[letter] = value
    end
  end

  def evaluate(value)
    return value unless value.is_a?(String) && value.start_with?('=')

    begin
      formula = value[1..] # Strip the '=' prefix
      formula.gsub!(/\$([A-Z])\$([0-9]+)/) do |match|
        col = Regexp.last_match(1)
        row = Regexp.last_match(2).to_i
        referenced_row = self.class.find(row)
        referenced_row.send(col)
      end

      eval(formula)
    rescue StandardError => e
      "Error: #{e.message}"
    end
  end
end

This use case would need a separation of attribute=, attribute and self[:attribute].
I'd like to see the getter value, but I'd like to edit the value in the database.