[TYPO3-mvc] How to persist data with ajax

[Stefan Kruse]

Hi, i would like to save objects per ajax in the database.For that i make a
jquery post. That works fine. The object is inserted in the DB. But when I
click the delete link (also a jquery post) than the object wouldn't delete.
But when I refresh the page and click again the delete link, then it would.
I use persistAll() but It doesn't work. Could somebody tell me why it is so
? Thanks