topic Re: Issues with Persistent Classes in Application Development and Automation Discussions

Issues with Persistent Classes

Former Member — Mon, 13 Aug 2007 13:41:07 GMT

Hi,

I am trying to use persistent classes because I don't want to write "handmade" code to access/modify/... my Class-Data.

I could persist my class, but I have Issues to acces the complete list of persistet class objects.

I "googled" a IF_OS_QUERY_MANAGER but I couldn't find this query manager within 6.40. Could anyone tell me how to query or access the complete class-list?

Thnx

P.S.: Are there any examples how I can work with persistent work references.

For instance I have a persistent Userobject whicht contains an persistent adress-object. Should I create an explicit foreign key "userid" in the address object or can I access cia os_guid the user object?)

Re: Issues with Persistent Classes

uwe_schieferstein — Mon, 13 Aug 2007 17:06:31 GMT

Hello Alex

Perhaps the tutorial

<a href="/people/thomas.jung3/blog/2005/05/15/abap-46c-to-640-delta-training 46C to 640 Delta Training</a> written by Thomas Jung may be helpful.

I have seen already a few postings regarding object references (as instance attributes) within persistent classes. However, so far I have not seen a solution for saving such compositions of object instances into their corresponding DB tables.

Regards

Uwe

Re: Issues with Persistent Classes

Former Member — Tue, 14 Aug 2007 06:25:13 GMT

Hello Uwe and Alex,

as write Uwe there are some postings without solution. I have used for better understanding in SAP R/3 Enterprise also bloq from Thomas Jung: <a href="/people/thomas.jung3/blog/2004/12/08/abap-persistent-classes-coding-without-sql Persistent Classes: Coding without SQL</a>.

Bye,

Peter