What should the startCursor
be set to if I want to query results from my first element to 10th element?
I understand that startCursor
should be a Cursor object, but what value should I set it to?
My entity ID's are primitive integers starting from 1.
Please comment if any further information is necessary.
You set a cursor on a query when you have it. Otherwise, you simply don't set it - this will query from the very beginning.
For example:
Query q = new Query("Person");
QueryResultList<Entity> results;
Cursor cursor = null;
FetchOptions queryOptions = FetchOptions.Builder.withChunkSize(500);
do {
if (cursor != null) {
queryOptions.startCursor(cursor);
}
results = datastore.prepare(q).asQueryResultList(queryOptions);
for (Entity entity : results) {
// do something
}
cursor = results.getCursor();
} while (results.size() == 500);