def get(self, cb=None, *cbArgs, **cbKWArgs):
"""
@returns: a deferred firing a generator of L{CouchTrackModel} objects.
"""
d = defer.Deferred()
self.debug("get")
last = [time.time()]
start = last[0]
self.debug("filtering on artist_mids %r", self.document.artist_mids)
from dadcouch.model import artist
tracks = yield self.database._internal.viewDocs(
"view-tracks-by-artist",
self.database.modelFactory(artist.ItemTracksByArtist),
keys=self.document.artist_mids,
)
trackList = list(tracks)
self.debug("got %r tracks in %.3f seconds", len(trackList), time.time() - last[0])
last[0] = time.time()
artists = []
gens = []
# FIXME: reduce this somewhere
for trackRow in trackList:
mid = yield trackRow.getMid()
if mid in artists:
continue
artists.append(mid)
tracks = yield trackRow.getTracks()
tracks = list(tracks)
random.shuffle(tracks)
gens.append((t for t in tracks))
random.shuffle(gens)
defer.returnValue(iterators.tmerge(*gens))
def testTMerge(self):
i1 = (i for i in [0, 1, 2])
i2 = (i for i in ["a", "b"])
l = list(iterators.tmerge(i1, i2))
self.assertEquals(l, [0, "a", 1, "b", 2])
