def get_previous_credits(self):
# Get all the credits that were awarded to the user in previous academic years.
credits = self.user.credit_recepients.filter(time__lt = get_current_session_start_datetime())
# Find the sum of the credits obtained above.
credits = credits.aggregate(number_of_credits = models.Sum('number_of_credits'))
if credits['number_of_credits'] != None:
return credits['number_of_credits']
else:
return 0
def credits(self, credit_type):
try:
# Get all the credits awarded to the user under the credit type.
credits = credit_type.credits.filter(awarded_to = self.user)
# Filter all the credits that were obtained in the current academic year.
credits = credits.filter(time__gte = get_current_session_start_datetime())
# Find the sum of the credits obtained after the two filters.
credits = credits.aggregate(number_of_credits = models.Sum('number_of_credits'))
if credits['number_of_credits'] != None:
return credits['number_of_credits']
else:
return 0
except AttributeError:
return None
