Max length of String stored with App Engine?

Question

When storing String fields with App Engine:

• What is the maximum length() of the String that App Engine datastore can handle?
• Also if using Objectify, is this max length the same or Objectify does some processing that affect this max length?

Answer 1

Objectify will automatically convert Strings of more than 500 characters to native Text storage. Be careful if you are indexing strings; Text objects are not indexed so the String > 500 chars will be unindexed.