Hello
"App Engine datastore does not support operator - ."
...this is what I get when trying to mimic the following query example
from Uses
For
Transactions<http://code.google.com/appengine/docs/java/datastore/transactions.html#Uses_For_Transactions>
.
query = pm.newQuery("select from Account " +
"where *parent-pk* == keyParam " +
"parameters Key keyParam");
I'm trying to obtain entity parent using its key which I keep in a property
of that child entity. (Assuming it is not possible to obtain parent key out
of child key.)
@Persistent
@Extension(vendorName="datanucleus", key="gae.*parent-pk*", value="true")
private Key customerKey;
Why does the example query above use "parent-pk" instead of "customerKey"?
Is it a mistake or should the query/operator actually work somehow? And why
does the customerKey need to be defined with the @Extension annotation?
Regards
J. Záruba
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