Getting typed results from ActiveRecord raw SQL

Question

In Sequel, I can do:

irb(main):003:0> DB[\"select false\"].get
=> false

Which returns a false boolean. I\'d like to be able to do so

Answer 1

I don't know if it is the way, but you can create activerecord model without table with sort of fake column:

class FunctionValue < ActiveRecord::Base
  def self.columns
    @columns ||= [];
  end

  def self.column(name, sql_type = nil, default = nil, null = true)
    columns << ActiveRecord::ConnectionAdapters::Column.new(
      name.to_s,
      default,
      sql_type.to_s,
      null
    )
  end

  column :value, :boolean
end

And then you can run this:

function_value = FunctionValue.find_by_sql('select false as value').first
function_value.value