gistfile1.rb

# Overwrite the quote column name since it quotes everything, but pk can return
# a multiple columname for a pk, and when that is quoted it does not match any
# column.
if ActiveRecord::Base.connection.adapter_name == "PostgreSQL" then
  module ActiveRecord
    module ConnectionAdapters
      class PostgreSQLAdapter 
        if instance_methods.include?('quote_column_name') then

          unless instance_methods.include?( 'orig_quote_column_name' )
            alias :orig_quote_column_name :quote_column_name

            # if it contains a , the there is a possiblity that it is a
            # composite colume, unless it already is quoted.  If it has a , and
            # no " then split, quote and rejoin
            def quote_column_name( name )
              s_name = name.to_s
              if s_name.index(',') then
                if s_name.index('"') then
                  return orig_quote_column_name( name )
                end
                parts = s_name.split(',')
                return parts.map {|c| orig_quote_column_name( c ) }.join(',')
              end
              orig_quote_column_name( name )
            end
          end
        end
      end
    end
  end
end