active_record.rb

module RedQuery
    module ActiveRecord
        @@where_mutex = Mutex.new
        def where(*args, &block)

            #establish scope for conditions
            conditions = nil

            #make sure only one thread at a time is altering the class
            #variables inside RedQuery::Serializers::Operations
            @@where_mutex.synchronize do

                #yielding the block will alter the Operations class
                yield

                #record altered conditions and values
                conditions = ::RedQuery::Serializers::Operations.conditions

                #clear the alterations
                ::RedQuery::Serializers::Operations.clear
            end

            #limit the records returned (:first, :all, :last)
            limit = args.first ? args.first : :all

            #call find with the conditions and values provided by the block
            find(limit, :conditions => conditions)
        end
    end
end

#extend ActiveRecord::Base if this file is required in a rails environment
if Object.const_defined?(:ActiveRecord)
    ActiveRecord::Base.send :extend, RedQuery::ActiveRecord
end


### example use
p = User.where { :id.between 1,2 }