This week's book giveaways are in the Cloud and AI/ML forums.
We're giving away four copies each of Cloud Native Patterns and Natural Language Processing and have the authors on-line!
See this thread and this one for details.
Win a copy of Cloud Native PatternsE this week in the Cloud forum
or Natural Language Processing in the AI/ML 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:
  • Campbell Ritchie
  • Devaka Cooray
  • Liutauras Vilda
  • Jeanne Boyarsky
  • Bear Bibeault
Sheriffs:
  • Paul Clapham
  • Knute Snortum
  • Rob Spoor
Saloon Keepers:
  • Tim Moores
  • Ron McLeod
  • Piet Souris
  • Stephan van Hulst
  • Carey Brown
Bartenders:
  • Tim Holloway
  • Frits Walraven
  • Ganesh Patekar

Simple requirement .. but I don't know how!

 
Ranch Hand
Posts: 44
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi All,

I work on an application that connect to database by hibernate (I use annotations). I have 2 entities (Department and Employee). Of course the Employee has one Department but the Department has many employees.

What I want is to be able to delete some Department without delete its Employees. (When deleting Department the hibernate should delete constraints that link some Employees to it without deleting the Employees).

Any help please.

Thank you.
 
Ranch Hand
Posts: 92
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
So One Department can have Many employees.

Put Cascade as None.What is the constraint?
Employee table put department discriptor.

Post your code also sample code.
 
abu alfouz
Ranch Hand
Posts: 44
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
*** This is the Department class:





*** This is the Employee class:




Any help please?
 
It is sorta covered in the JavaRanch Style Guide.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!