Quick way to de-boilerplate Arel usage for ActiveRecord relations

initializers_active_record_extensions.rb

ActiveRecord::Base.include(Maven::ArelProxy::ActiveRecordExtension)

maven_arel_proxy.rb

class Maven::ArelProxy
  attr_reader :model_class

  def initialize(model_class)
    @model_class = model_class

    model_class.column_names.map do |col|
      define_singleton_method(col) do
        model_class.arel_table[col]
      end
    end
  end

  module ActiveRecordExtension
    extend ActiveSupport::Concern

    class_methods do
      def arel_proxy
        @_arel_proxy ||= ::Maven::ArelProxy.new(self)
      end

      def arel_where(&block)
        where(arel_proxy.instance_eval(&block))
      end
    end
  end
end