string型もしくはtext型なのに最大長のバリデーションをかけていないものを出力するスクリプト

should_have_length_validations.rb

ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |model|
  string_or_text_columns = model.columns.select { |column| column.type == :string || column.type == :text }
  columns_with_maximum_length_validation = model.validators.select {|v| v.is_a? ActiveRecord::Validations::LengthValidator }.select {|v| v.options[:maximum] || v.options[:within] }.map(&:attributes).flatten.uniq
  string_or_text_columns.each do |column|
    if columns_with_maximum_length_validation.include?(column.name.to_sym)
      puts "#{model.name}##{column.name} is OK"
    else
      puts "#{model.name}##{column.name} is NG"
    end
  end
end