Problems with NWDS 7.1 EHP1 and JPA persistence unit

[Former Member]

In EJB project with JPA Facet Iu2019m working without any problem for several days. But, after two weeks, JPA plug-in of Eclipse is not working fine.

When I try to generate DDL Iu2019m getting the following error window: There isnu2019t a registered persistence unit in the project. But this is not true. Curiously sometimes it works fine.

Can any body has any suggestion for correcting this issue?

Thanks in advanced.

[Former Member]

Hi Throsten,

It works the first time but now Iu2019m experiencing the same inconvenient.

[Former Member]

Hi Sergi,

Which platform are you using as a persistence provider?

Ensure that it is "SAP implementation of JPA"...

Regards,

Yordan

[former_member182046]

Hi,

I had the same problem and luckily stumbled upon the solution today.

1. File persistence.xml is located in /ejbModule/META-INF. Path /build/classes is empty.

2. Right-click on the DC/project and select "Properties".

3. In "JPA", change parameter "Platform" or "Connection", then restore the original value. The purpose is to set a dirty flag which will make the IDE generate the missing stuff in path build/classes.

4. A copy of resource branch META-INF and the .classes files will appear below /build.

5. Right-click on the DC/Project and select "JPA-Tools -> Generate DDL".

Please let me know if it works for you.

Cheers,

Thorsten