• 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 Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Liutauras Vilda
  • Paul Clapham
Sheriffs:
  • paul wheaton
  • Tim Cooke
  • Henry Wong
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Piet Souris
Bartenders:
  • Mike London

Hibernate and Primary Key

 
Ranch Hand
Posts: 2234
Eclipse IDE Firefox Browser Redhat
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator

Hi ,

I am trying to use the Hibernate Plugin to generate the hbm files for the Application .

But this complains that my Table doesn't have a Primary key .

so i have a question here

Will the Hibernate will not work if the Tables don't have a Primary Key concept ?

Thanks in advance.
 
Bartender
Posts: 10336
Hibernate Eclipse IDE Java
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
No. But then a relational data model that doesn't define primary keys is arguably broken.

As has been discussed at length in this forum (have a search through the older posts) an entity in a relational database without a primary key cannot be relational so will not work with an Object-Relational Mapping tool. There are partial workarounds (again, a brief search will get you these) but the easiest fix is to correct your data model. Is there a reason you defined an entity without a primary key?
 
author and cow tipper
Posts: 5006
1
Hibernate Spring Tomcat Server
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
You need a primary key.

-Cameron McKenzie
 
Ravi Kiran Va
Ranch Hand
Posts: 2234
Eclipse IDE Firefox Browser Redhat
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks a lot Paul and Cameron
 
Consider Paul's rocket mass heater.
reply
    Bookmark Topic Watch Topic
  • New Topic