def benchmark_calculate_course_aggregate(student, course, marking_period, items=None, recalculate_all_categories=False):
# doesn't recalculate component aggregates by default
if items is None:
# QUICK HACK to use new Aggregate calculation method
# TODO: Subclass Aggregate and override mark_set for one-off sets of Items
agg, created = benchmark_get_create_or_flush(
Aggregate, student=student, course=course, marking_period=marking_period, category=None
)
agg.calculate(recalculate_all_categories)
return agg, created
# /HACK (haha, right.)
# just leave items alone--we don't actually consider it here; we only pass it to benchmark_calculate_course_category_aggregate
# setting items here will prevent benchmark_calculate_course_category_aggregate from saving anything
save = True
items_categories = ()
else:
# don't store aggregates for every one-off combination of items
save = False
# we'll have to miss cache and recaculate any category to which an item belongs
items_categories = Category.objects.filter(item__in=items).distinct()
calculation_rule = benchmark_find_calculation_rule(course.marking_period.all()[0].school_year)
# initialize attributes
criteria = {"course": course, "category": None, "marking_period": marking_period}
# silly name is silly, and should not be part of the criteria
silly_name = "G! {} - Course Average ({}, {})".format(student, course, marking_period)
# don't use get_or_create; otherwise we may end up saving an empty object
try:
agg = benchmark_get_or_flush(student.aggregate_set, **criteria)
created = False
except Aggregate.DoesNotExist:
agg = Aggregate(student=student, **criteria)
created = True
agg.name = silly_name
# begin the actual calculations!
agg.cached_substitution = None
course_numer = course_denom = Decimal(0)
for rule_category in calculation_rule.per_course_category_set.filter(apply_to_departments=course.department):
criteria["category"] = rule_category.category
cat_agg, cat_created = benchmark_get_create_or_flush(student.aggregate_set, **criteria)
if cat_created or recalculate_all_categories or rule_category.category in items_categories:
cat_agg, cat_created = benchmark_calculate_course_category_aggregate(
student, course, rule_category.category, marking_period, items
)
if cat_agg.cached_value is not None:
course_numer += rule_category.weight * cat_agg.cached_value
course_denom += rule_category.weight
# yes, agg will just end up with the last substitution, but tough
if cat_agg.cached_substitution is not None:
agg.cached_substitution = cat_agg.cached_substitution
if course_denom:
agg.cached_value = course_numer / course_denom
else:
agg.cached_value = None
if save:
agg.save()
return agg, created
def benchmark_calculate_category_as_course_aggregate(student, category, marking_period):
agg, created = benchmark_get_create_or_flush(student.aggregate_set, course=None, category=category, marking_period=marking_period)
agg.name = 'G! {} - {} (All Courses, {})'.format(student, category, marking_period)
agg.cached_substitution = None
calculation_rule = benchmark_find_calculation_rule(marking_period.school_year)
category_as_course = calculation_rule.category_as_course_set.get(category=category)
category_numer = category_denom = Decimal(0)
for course in Course.objects.filter(award_credits=True, courseenrollment__user__username=student.username, marking_period=marking_period, department__in=category_as_course.include_departments.all()).distinct():
credits = Decimal(course.credits) / course.marking_period.count()
try:
category_aggregate = benchmark_get_or_flush(Aggregate, student=student, marking_period=marking_period, category=category, course=course)
except Aggregate.DoesNotExist:
category_aggregate = benchmark_calculate_course_category_aggregate(student, course, category, marking_period)[0]
if category_aggregate is not None and category_aggregate.cached_value is not None:
calculate_as, display_as = calculation_rule.substitute(category_aggregate, category_aggregate.cached_value)
category_numer += credits * calculate_as
category_denom += credits
# yes, agg will just end up with the last substitution, but tough
if display_as is not None and len(display_as):
agg.cached_substitution = display_as
if category_denom:
agg.cached_value = category_numer / category_denom
else:
agg.cached_value = None
agg.save()
return agg, created
def benchmark_calculate_category_as_course_aggregate(student, category,
marking_period):
agg, created = benchmark_get_create_or_flush(student.aggregate_set,
course_section=None,
category=category,
marking_period=marking_period)
agg.name = 'G! {} - {} (All Courses, {})'.format(student, category,
marking_period)
agg.cached_substitution = None
calculation_rule = benchmark_find_calculation_rule(
marking_period.school_year)
category_as_course = calculation_rule.category_as_course_set.get(
category=category)
category_numer = category_denom = Decimal(0)
for course_section in CourseSection.objects.filter(
course__course_type__award_credits=True,
courseenrollment__user__username=student.username,
marking_period=marking_period,
department__in=category_as_course.include_departments.all(
)).distinct():
credits = Decimal(
course_section.credits) / course_section.marking_period.count()
try:
category_aggregate = benchmark_get_or_flush(
Aggregate,
student=student,
marking_period=marking_period,
category=category,
course_section=course_section)
except Aggregate.DoesNotExist:
category_aggregate = benchmark_calculate_course_category_aggregate(
student, course_section, category, marking_period)[0]
if category_aggregate is not None and category_aggregate.cached_value is not None:
calculate_as, display_as = calculation_rule.substitute(
category_aggregate, category_aggregate.cached_value)
category_numer += credits * calculate_as
category_denom += credits
# yes, agg will just end up with the last substitution, but tough
if display_as is not None and len(display_as):
agg.cached_substitution = display_as
if category_denom:
agg.cached_value = category_numer / category_denom
else:
agg.cached_value = None
agg.save()
return agg, created
def benchmark_calculate_course_aggregate(student,
course_section,
marking_period,
items=None,
recalculate_all_categories=False):
# doesn't recalculate component aggregates by default
if items is None:
# QUICK HACK to use new Aggregate calculation method
# TODO: Subclass Aggregate and override mark_set for one-off sets of Items
agg, created = benchmark_get_create_or_flush(
Aggregate,
student=student,
course_section=course_section,
marking_period=marking_period,
category=None)
agg.calculate(recalculate_all_categories)
return agg, created
# /HACK (haha, right.)
# just leave items alone--we don't actually consider it here; we only pass it to benchmark_calculate_course_category_aggregate
# setting items here will prevent benchmark_calculate_course_category_aggregate from saving anything
save = True
items_categories = ()
else:
# don't store aggregates for every one-off combination of items
save = False
# we'll have to miss cache and recaculate any category to which an item belongs
items_categories = Category.objects.filter(item__in=items).distinct()
calculation_rule = benchmark_find_calculation_rule(
course_section.marking_period.all()[0].school_year)
# initialize attributes
criteria = {
'course_section': course_section,
'category': None,
'marking_period': marking_period
}
# silly name is silly, and should not be part of the criteria
silly_name = 'G! {} - Course Average ({}, {})'.format(
student, course_section, marking_period)
# don't use get_or_create; otherwise we may end up saving an empty object
try:
agg = benchmark_get_or_flush(student.aggregate_set, **criteria)
created = False
except Aggregate.DoesNotExist:
agg = Aggregate(student=student, **criteria)
created = True
agg.name = silly_name
# begin the actual calculations!
agg.cached_substitution = None
course_section_numer = course_section_denom = Decimal(0)
for rule_category in calculation_rule.per_course_category_set.filter(
apply_to_departments=course_section.department):
criteria['category'] = rule_category.category
cat_agg, cat_created = benchmark_get_create_or_flush(
student.aggregate_set, **criteria)
if cat_created or recalculate_all_categories or rule_category.category in items_categories:
cat_agg, cat_created = benchmark_calculate_course_category_aggregate(
student, course_section, rule_category.category,
marking_period, items)
if cat_agg.cached_value is not None:
course_section_numer += rule_category.weight * cat_agg.cached_value
course_section_denom += rule_category.weight
# yes, agg will just end up with the last substitution, but tough
if cat_agg.cached_substitution is not None:
agg.cached_substitution = cat_agg.cached_substitution
if course_section_denom:
agg.cached_value = course_section_numer / course_section_denom
else:
agg.cached_value = None
if save:
agg.save()
return agg, created
