def _update_ratings():
calc = RatingCalculator()
START_RATING = cur_config().rating_start
players = {}
match_ids = list(
set(
PlayerResult.objects.filter(rating=None).values_list('match_id',
flat=True)))
for match in Match.objects.filter(id__in=match_ids).order_by('date', 'id'):
player_positions = match.get_positions()
rating_results = []
for p in player_positions:
# Fetch the current rating value
rated_results = PlayerResult.objects.filter(
player=p['id']).exclude(rating=None).order_by(
'-match__date', '-match__id')
if not rated_results.exists():
rating = START_RATING
else:
rating = rated_results[0].rating
rating_results.append(RatingResult(p['id'], rating, p['position']))
# Calculate new ratings
new_player_ratings = calc.new_ratings(rating_results)
# Update
for p in new_player_ratings:
players[p.dbid] = p.rating
PlayerResult.objects.filter(player=p.dbid).filter(
match=match).update(rating=p.rating)
def setUp(self):
self.calc = RatingCalculator()
