I need to get the 1st and last result from a query that uses only keys
(and they keys are what i need), i'm even using a cached cursor:
q = self.model.all(keys_only=True).order('__key__') # fetch/return only keys
#maybe there's a better way to get the 1st/last key (taking too long)
if self.job.currentCursorKey is not None:
# 1st request
logging.debug("\tusing last cursor: %s" % self.job.currentCursorKey)
q.with_cursor(self.job.currentCursorKey)
after this i'm trying two methods:
A)
# Fetch method
users_keys = q.fetch(limit)
startKey = str(users_keys[0])
endKey = str(users_keys[-1])
B)
# Double query method
startKey = str(q.get())
users_keys = q.fetch(limit=1, offset=limit) # get the endKey of the segment
endKey = str(users_keys[0])
but both take too long (7/8 seconds at least). Should i refactor to
GQL for example and do 2 SELECT's? One for the 1st and another for the
2nd?
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