Datastore entity with kind and key has a null property named
Question
After adding a boolean attribute to an object, fetching that object from the datastore results in the error:
Datastore entity with kind <Class> and key <Class:ID> has a
null property named <attribute>
1 answers
solution1
9 ACCPTED 2009-11-28 23:03:42
Don't use primitive data-types, use their wrapper classes.
Instead of boolean, use Boolean, etc.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.
Related Question
Is entity key in memcache the same as in datastore
retrieve an entity with a key from datastore
How to add primitive property to existing java datastore entity to avoid null pointer exception
Google Datastore: check if ANY entity exists of given kind
Authenticating with GAE Datastore return null on Entity User
How to define an entity property, in GAE datastore, to be unique?
Manually Index an entity's property on datastore
Can't get Entity from Datastore by Key
datastore entity with more than one unique key
How can you retrieve key of a datastore Entity
Related Tags