Did you reverse the error and queries? In the first, you're getting a
list
of keys, so those aren't entities to have caused the multiple entity
exception.
On Aug 1, 11:12 pm, Mauricio Aristizabal <aris...@gmail.com> wrote:
> I was just trying retrieve a List of entities and do a .size() to get a
> current count, but ran into this:
>
> Caused by: java.lang.IllegalArgumentException: can't operate on multiple
> entity groups in a single transaction. found both Element {
>
> type: "Conversation"
>
> id: 37
>
> }
>
> and Element {
>
> type: "Reply"
>
> id: 38
>
> }
>
> It was very confusing because nowhere am I doing anything with Reply #38.
> It happens only when I get the list like this (JPA):
>
> entityManager().createQuery("SELECT key FROM Reply o WHERE
> o.conversationKey = :conversation").setParameter("conversation",
> conversationKey).getResultList();
>
> and NOT if I do it like this:
>
> entityManager().createQuery("SELECT o FROM Reply o WHERE
> o.conversationKey = :conversation").setParameter("conversation",
> conversationKey).getResultList();
>
> Any idea why this is?
>
> I'm not blocked... I'll just keep a counter. Mainly wanted to share in case
> someone else is stumped by this error.
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