def unsubscribe(user, module):
subs=Subscription.all().filter('subscribed_user ='******'module =', module).run()
for s in subs: s.delete()
module.student_count-=1
module.put()
grades=Grade.all().filter('student =', user).run()
for assessm in module.assessments:
for grade in grades:
if grade.assessment.key() == assessm.key():
grade.delete()
lectRats=LecturerRating.all().filter('module =',module).filter('user =',user).run()
for lectRat in lectRats: lectRat.delete()
def reset_db():
for user in User.all(): user.delete()
for ycs in YearCourseSemester.all(): ycs.delete()
for mod in Module.all(): mod.delete()
for sub in Subscription.all(): sub.delete()
for sub in Category.all(): sub.delete()
for i in Thread.all(): i.delete()
for i in Post.all(): i.delete()
for i in Rating.all(): i.delete()
for i in Assessment.all(): i.delete()
for i in Grade.all(): i.delete()
for i in Lecturer.all(): i.delete()
for i in LecturerRating.all(): i.delete()