Ordering would help

Realized I completely dropped the ball
  because I have no way to order metadata_items so they are
  displayed in a random order. Ha ha ha cry. I considered ordering them by date
  once retrieved and for most cases I have seen that would probably be fine but
  I have only looked at a couple of dozen out of millions of accounts and it 
  falls rather short of moe's goal to be a toolkit for using dynamo at scale. 
  So, ugh, an index :( Not the end of the world but I was disappointed that my
  persistence strategy was not as efficient as I had expected. But then! I 
  remembered dynamo scans through range keys in order (you can choose forwards
  or back) so it was simply a matter of adding a timestamp to the hash key and
  making sure they follow dynamo's rules for ordering strings.