This week's book giveaway is in the Cloud/Virtualization forum.
We're giving away four copies of Learning OpenStack Networking: Build a solid foundation in virtual networking technologies for OpenStack-based clouds and have James Denton on-line!
See this thread for details.
Win a copy of Learning OpenStack Networking: Build a solid foundation in virtual networking technologies for OpenStack-based clouds this week in the Cloud/Virtualization forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Liutauras Vilda
  • Campbell Ritchie
  • Tim Cooke
  • Bear Bibeault
  • Devaka Cooray
Sheriffs:
  • Jeanne Boyarsky
  • Knute Snortum
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Ganesh Patekar
  • Stephan van Hulst
  • Pete Letkeman
  • Carey Brown
Bartenders:
  • Tim Holloway
  • Ron McLeod
  • Vijitha Kumara

Members are not poppulated?  RSS feed

 
Ranch Hand
Posts: 751
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi guys! I'm trying to select record from the database and map it into my class. I'm using JPA and Toplink. First of all, here is my query.




My entity class




As you can see, I'm thinking that userId and all other fields would already be poppulated. But when I supply correct data for the username and password and the Object is retrieved, its members especially the userId is not filled. Why is that? Thanks!
 
ranger
Sheriff
Posts: 17314
11
IntelliJ IDE Mac Spring
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Probably because it assumes that youa re going to fill that in, because your mapping is

@Id
@Column(name = "user_id", nullable = false)
private Integer userId;

Where is the @GeneratedValue to tell it to generate the value?

Mark
 
Don't get me started about those stupid light bulbs.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!