Merge does not update collections

Jan-Martijn · **Joined:** Tue Feb 19, 2008 8:51 am **Posts:** 2

Hi everyone!

Well I hope someone has soms suggestions for my problemen. I'm struggeling with it for several weeks now, and tried every solution i could think of.

Persisting object with collections is not a problem, but when i try to update a collection, hibernate seems to ignore de updated data. I know you have explicitly tell hibernate to also update collection, but still than it doesn't seem to work. Here my entity classes:

entity Form:

Code:

[...]

   @ManyToMany(cascade = CascadeType.MERGE, fetch = FetchType.EAGER)
   @JoinTable(name = "form_theme", catalog = "webloket_dji", joinColumns = { @JoinColumn(name = "forms_ID", nullable = false, updatable = true) }, inverseJoinColumns = { @JoinColumn(name = "themeList_ID", nullable = false, updatable = true) })
   private Set<Theme> themeList;
[...]

[...]
entity Theme:

Code:

    @ManyToMany(mappedBy="themeList", cascade=CascadeType.MERGE,    fetch=FetchType.EAGER)
    @Cascade(org.hibernate.annotations.CascadeType.SAVE_UPDATE) 
   private Set<Form> forms;
[...]

how i call the merge method:

Code:

   @Transactional
   public Form update(Form form) {
      logger.debug("Updating form with id: "       + form.getId());
      logger.debug("Number of Themes in form: "    + form.getThemeList().size());
      logger.debug("Number of Chars in form: "    + form.getSearchChars().size());
      
      return getJpaTemplate().merge(form); 
   }

emmanuel · **Posted:** Tue Feb 19, 2008 8:26 pm

please use the standard question template, especially the version number is missing in your post.

Jan-Martijn · **Joined:** Tue Feb 19, 2008 8:51 am **Posts:** 2

emmanuel wrote:

please use the standard question template, especially the version number is missing in your post.

Hi Emmanuel,

Thnx for you reaction, but could you give me some more information. How do I use the standard template en what do you mean by the version number?

Kind regards

Jan-Martijn

emmanuel · **Posted:** Wed Feb 20, 2008 1:19 pm

The template was inserted when you created the post.

Quote:

Need help with Hibernate? Read this first:
http://www.hibernate.org/ForumMailingli ... AskForHelp

Hibernate version:

Mapping documents:

Code between sessionFactory.openSession() and session.close():

Full stack trace of any exception that occurs:

Name and version of the database you are using:

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:

Problems with Session and transaction handling?

Read this: http://hibernate.org/42.html

the hibernate version numbers are displayed in the logs at INFO level when the SessionFActory starts up[/code]