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Choose Relationships to Generate Dialog Box does not appear [message #522991]

Wed, 24 March 2010 16:58

bob

Messages: 8
Registered: March 2010

Junior Member

Hello group,

I installed Eclipselink version 2.0.1 and try to use it for ORM.I Created the project.
and successfuly Import database tables From an Existing Data Model in MySQL.

in next step to generate classes from tables I chose:

Selected > Generate Classes and Descriptors from > Selected Tables or All Tables from the menu

then I Completed each field on the Generate Classes and Descriptors dialog box and click OK

In next step according to the user mannual

http:// wiki.eclipse.org/Using_Workbench_%28ELUG%29#Generating_Class es_and_Descriptors_from_Database_Tables

I am suppose to get "Choose Relationships to Generate Dialog Box" where I have forign keys point to the reference tables in my tables

But this dialog box does NOT appear!!

Any help to solve this problem?

Thanks
b.

[Updated on: Wed, 24 March 2010 17:57]

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Re: Choose Relationships to Generate Dialog Box does not appear [message #523266 is a reply to message #522991]

Thu, 25 March 2010 17:27

James Sutherland

Messages: 1939
Registered: July 2009
Location: Ottawa, Canada

Senior Member

Do your tables have any foreign key constraints? If not then you will not get the dialog.

Note that the Mapping Workbench is only for using the old native EclipseLink API, not for JPA, which most new applications use. For JPA you can use any JPA tool, such as Eclipse Dali, or Oracle JDeveloper, or code the annotations by hand.

James : Wiki : Book : Blog : Twitter

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Re: Choose Relationships to Generate Dialog Box does not appear [message #523282 is a reply to message #523266]

Thu, 25 March 2010 18:33

bob

Messages: 8
Registered: March 2010

Junior Member

Thank you for your reply.

Yes I have foreign keys in two of my tables with reference to to other tables.

I just wanted to create classes and put annotation for mapping inside the classes that is why I am using eclipselink. but you indicated that eclipselink 2.0.1 does not do the mapping?!

Quote:

Note that the Mapping Workbench is only for using the old native EclipseLink API, not for JPA, which most new applications use. For JPA you can use any JPA tool, such as Eclipse Dali, or Oracle JDeveloper, or code the annotations by hand.

Then what it means in this link?I am really confuse.

I am Using Workbench at:

http:// wiki.eclipse.org/Using_Workbench_%28ELUG%29#Generating_Class es_and_Descriptors_from_Database_Tables

Thanks
Bob

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Re: Choose Relationships to Generate Dialog Box does not appear [message #523298 is a reply to message #522991]

Thu, 25 March 2010 19:34

James Sutherland

Messages: 1939
Registered: July 2009
Location: Ottawa, Canada

Senior Member

The Mapping Workbench is how mappings were defined before the JPA standard. This exports EclipseLink specific XML for the EclipseLink specific mapping API that was used before JPA. The doc is just documenting this old feature/model (I agree the docs are confusing and we are working on updating them).

For a new application, I would recommend you use JPA, and do not use the Mapping Workbench. If you need to generate classes from tables, you can use Eclipse's JPA tooling support (Dali).

I suppose you could just use the MW to generate you java files, and then edit them by hand, and add the JPA annotations, but it would be better to use a proper JPA tool.

James : Wiki : Book : Blog : Twitter

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