def grade(self, page_context, page_data, answer_data, grade_data):
correctness = 0
if answer_data is None:
return AnswerFeedback(correctness=0,
feedback="No answer provided.")
answer = answer_data["answer"]
for correct_answer in self.page_desc.answers:
if correct_answer == answer:
correctness = 1
break
return AnswerFeedback(correctness=correctness)
def get_most_recent_feedback(self):
grade = self.get_most_recent_grade()
from course.page import AnswerFeedback
if grade is not None:
return AnswerFeedback.from_json(grade.feedback)
else:
return None
def get_feedback_for_grade(grade):
try:
bulk_feedback_json = FlowPageBulkFeedback.objects.get(
page_data=grade.visit.page_data, grade=grade).bulk_feedback
except ObjectDoesNotExist:
bulk_feedback_json = None
from course.page import AnswerFeedback
if grade is not None:
return AnswerFeedback.from_json(grade.feedback, bulk_feedback_json)
else:
return None
def get_feedback_for_grade(grade):
try:
bulk_feedback_json = FlowPageBulkFeedback.objects.get(
page_data=grade.visit.page_data,
grade=grade).bulk_feedback
except ObjectDoesNotExist:
bulk_feedback_json = None
from course.page import AnswerFeedback
if grade is not None:
return AnswerFeedback.from_json(
grade.feedback, bulk_feedback_json)
else:
return None
def gather_grade_info(flow_session, answer_visits):
all_page_data = (FlowPageData.objects
.filter(flow_session=flow_session)
.order_by("ordinal"))
points = 0
max_points = 0
fully_correct_count = 0
partially_correct_count = 0
incorrect_count = 0
for i, page_data in enumerate(all_page_data):
assert i == page_data.ordinal
if answer_visits[i] is None:
# page did not expect an answer
continue
grade = answer_visits[i].get_most_recent_grade()
assert grade is not None
from course.page import AnswerFeedback
feedback = AnswerFeedback.from_json(grade.feedback)
if feedback is None or feedback.correctness is None:
return None
max_points += grade.max_points
points += grade.max_points*feedback.correctness
if feedback.correctness == 1:
fully_correct_count += 1
elif feedback.correctness == 0:
incorrect_count += 1
else:
partially_correct_count += 1
return GradeInfo(
points=points,
max_points=max_points,
fully_correct_count=fully_correct_count,
partially_correct_count=partially_correct_count,
incorrect_count=incorrect_count)
def grade_flow_page(pctx, flow_session_id, page_ordinal):
if pctx.role not in [
participation_role.instructor,
participation_role.teaching_assistant]:
raise PermissionDenied("must be instructor or TA to view grades")
flow_session = get_object_or_404(FlowSession, id=int(flow_session_id))
if flow_session.course.pk != pctx.course.pk:
raise SuspiciousOperation("Flow session not part of specified course")
fpctx = FlowPageContext(pctx.repo, pctx.course, flow_session.flow_id,
page_ordinal, participation=flow_session.participation,
flow_session=flow_session)
if fpctx.page_desc is None:
raise http.Http404()
# {{{ enable flow session zapping
all_flow_sessions = list(FlowSession.objects
.filter(
course=pctx.course,
flow_id=flow_session.flow_id,
in_progress=flow_session.in_progress,
for_credit=flow_session.for_credit)
.order_by(
"participation__user__last_name",
"start_time"))
next_flow_session_id = None
prev_flow_session_id = None
for i, other_flow_session in enumerate(all_flow_sessions):
if other_flow_session.pk == flow_session.pk:
if i > 0:
prev_flow_session_id = all_flow_sessions[i-1].id
if i + 1 < len(all_flow_sessions):
next_flow_session_id = all_flow_sessions[i+1].id
# }}}
# {{{ reproduce student view
form = None
feedback = None
answer_data = None
if fpctx.page.expects_answer():
if fpctx.prev_answer_visit is not None:
answer_data = fpctx.prev_answer_visit.answer
most_recent_grade = fpctx.prev_answer_visit.get_most_recent_grade()
if most_recent_grade is not None:
if most_recent_grade.feedback is not None:
from course.page import AnswerFeedback
feedback = AnswerFeedback.from_json(
most_recent_grade.feedback)
else:
feedback = None
grade_data = most_recent_grade.grade_data
else:
feedback = None
grade_data = None
else:
feedback = None
form = fpctx.page.make_form(
fpctx.page_context, fpctx.page_data.data,
answer_data, answer_is_final=True)
if form is not None:
form_html = fpctx.page.form_to_html(
pctx.request, fpctx.page_context, form, answer_data)
else:
form_html = None
max_points = None
points_awarded = None
if fpctx.page.expects_answer():
max_points = fpctx.page.max_points(fpctx.page_data)
if feedback is not None and feedback.correctness is not None:
points_awarded = max_points * feedback.correctness
# }}}
# {{{ grading form
if fpctx.page.expects_answer() and fpctx.prev_answer_visit is not None:
request = pctx.request
if pctx.request.method == "POST":
grading_form = fpctx.page.post_grading_form(
fpctx.page_context, fpctx.page_data, grade_data,
request.POST, request.FILES)
if grading_form.is_valid():
grade_data = fpctx.page.update_grade_data_from_grading_form(
fpctx.page_context, fpctx.page_data, grade_data,
grading_form, request.FILES)
feedback = fpctx.page.grade(
fpctx.page_context, fpctx.page_data,
answer_data, grade_data)
if feedback is not None:
correctness = feedback.correctness
else:
correctness = None
if feedback is not None:
feedback_json = feedback.as_json()
else:
feedback_json = None
grade = FlowPageVisitGrade(
visit=fpctx.prev_answer_visit,
grader=pctx.request.user,
graded_at_git_commit_sha=fpctx.flow_commit_sha,
grade_data=grade_data,
max_points=fpctx.page.max_points(fpctx.page_data),
correctness=correctness,
feedback=feedback_json)
grade.save()
current_access_rule = fpctx.get_current_access_rule(
flow_session, flow_session.participation.role,
flow_session.participation, now())
from course.flow import grade_flow_session
grade_flow_session(fpctx, flow_session, current_access_rule)
else:
grading_form = fpctx.page.make_grading_form(
fpctx.page_context, fpctx.page_data, grade_data)
else:
grading_form = None
if grading_form is not None:
from crispy_forms.layout import Submit
grading_form.helper.add_input(
Submit(
"submit", "Submit",
accesskey="s",
css_class="col-lg-offset-2 cf-grading-save-button"))
grading_form_html = fpctx.page.grading_form_to_html(
pctx.request, fpctx.page_context, grading_form, grade_data)
else:
grading_form_html = None
# }}}
grading_opportunity = get_flow_grading_opportunity(
pctx.course, flow_session.flow_id, fpctx.flow_desc)
return render_course_page(
pctx,
"course/grade-flow-page.html",
{
"flow_identifier": fpctx.flow_identifier,
"flow_session": flow_session,
"flow_desc": fpctx.flow_desc,
"ordinal": fpctx.ordinal,
"page_data": fpctx.page_data,
"body": fpctx.page.body(
fpctx.page_context, fpctx.page_data.data),
"form": form,
"form_html": form_html,
"feedback": feedback,
"max_points": max_points,
"points_awarded": points_awarded,
"grading_opportunity": grading_opportunity,
"prev_flow_session_id": prev_flow_session_id,
"next_flow_session_id": next_flow_session_id,
"grading_form": grading_form,
"grading_form_html": grading_form_html,
})
def view_flow_page(pctx, flow_identifier, ordinal):
request = pctx.request
flow_session = find_current_flow_session(
request, pctx.course, flow_identifier)
if flow_session is None:
messages.add_message(request, messages.WARNING,
"No in-progress session record found for this flow. "
"Redirected to flow start page.")
return redirect("course.flow.start_flow",
pctx.course.identifier,
flow_identifier)
fpctx = FlowPageContext(pctx.repo, pctx.course, flow_identifier, ordinal,
participation=pctx.participation,
flow_session=flow_session)
if fpctx.page_desc is None:
messages.add_message(request, messages.ERROR,
"Your session does not match the course content and needs "
"to be reset. Course staff have been notified about this issue. "
"Please get in touch with them to get help.")
from django.template.loader import render_to_string
message = render_to_string("course/session-mismatch.txt", {
"page_data": fpctx.page_data,
"course": pctx.course,
"user": pctx.request.user,
})
from django.core.mail import send_mail
from django.conf import settings
send_mail("[%s] session mismatch with course content"
% pctx.course.identifier,
message,
settings.ROBOT_EMAIL_FROM,
recipient_list=[pctx.course.email])
return redirect("course.flow.start_flow",
pctx.course.identifier,
flow_identifier)
current_access_rule = fpctx.get_current_access_rule(
flow_session, pctx.role, pctx.participation,
get_now_or_fake_time(request))
permissions = fpctx.page.get_modified_permissions_for_page(
current_access_rule.permissions)
page_context = fpctx.page_context
page_data = fpctx.page_data
answer_data = None
grade_data = None
if flow_permission.view not in permissions:
raise PermissionDenied("not allowed to view flow")
if request.method == "POST":
if "finish" in request.POST:
return redirect("course.flow.finish_flow_session_view",
pctx.course.identifier, flow_identifier)
else:
# reject answer update if flow is not in-progress
if not flow_session.in_progress:
raise PermissionDenied("session is not in progress")
# reject if previous answer was final
if (fpctx.prev_answer_visit is not None
and fpctx.prev_answer_visit.is_graded_answer
and flow_permission.change_answer
not in permissions):
raise PermissionDenied("already have final answer")
form = fpctx.page.post_form(
fpctx.page_context, fpctx.page_data.data,
post_data=request.POST, files_data=request.FILES)
pressed_button = get_pressed_button(form)
if form.is_valid():
# {{{ form validated, process answer
messages.add_message(request, messages.INFO,
"Answer saved.")
page_visit = FlowPageVisit()
page_visit.flow_session = flow_session
page_visit.page_data = fpctx.page_data
page_visit.remote_address = request.META['REMOTE_ADDR']
answer_data = page_visit.answer = fpctx.page.answer_data(
fpctx.page_context, fpctx.page_data.data,
form, request.FILES)
page_visit.is_graded_answer = pressed_button == "submit"
page_visit.save()
answer_was_graded = page_visit.is_graded_answer
may_change_answer = (
not answer_was_graded
or flow_permission.change_answer
in permissions)
feedback = fpctx.page.grade(
page_context, page_data.data, page_visit.answer,
grade_data=None)
if page_visit.is_graded_answer:
grade = FlowPageVisitGrade()
grade.visit = page_visit
grade.max_points = fpctx.page.max_points(page_data.data)
grade.graded_at_git_commit_sha = fpctx.flow_commit_sha
if feedback is not None:
grade.correctness = feedback.correctness
grade.feedback = feedback.as_json()
grade.save()
del grade
if (pressed_button == "save_and_next"
and not will_receive_feedback(permissions)):
return redirect("course.flow.view_flow_page",
pctx.course.identifier,
flow_identifier,
fpctx.ordinal + 1)
elif (pressed_button == "save_and_finish"
and not will_receive_feedback(permissions)):
return redirect("course.flow.finish_flow_session_view",
pctx.course.identifier, flow_identifier)
else:
form = fpctx.page.make_form(
page_context, page_data.data,
page_visit.answer, not may_change_answer)
# continue at common flow page generation below
# }}}
del page_visit
else:
# form did not validate
create_flow_page_visit(request, flow_session, fpctx.page_data)
answer_was_graded = False
may_change_answer = True
# because we were allowed this far in by the check above
feedback = None
# continue at common flow page generation below
else:
create_flow_page_visit(request, flow_session, fpctx.page_data)
if fpctx.prev_answer_visit is not None:
answer_was_graded = fpctx.prev_answer_visit.is_graded_answer
else:
answer_was_graded = False
may_change_answer = (
(not answer_was_graded
or (flow_permission.change_answer in permissions))
# can happen if no answer was ever saved
and flow_session.in_progress)
if fpctx.page.expects_answer():
if fpctx.prev_answer_visit is not None:
answer_data = fpctx.prev_answer_visit.answer
most_recent_grade = fpctx.prev_answer_visit.get_most_recent_grade()
if most_recent_grade is not None:
if most_recent_grade.feedback is not None:
from course.page import AnswerFeedback
feedback = AnswerFeedback.from_json(
most_recent_grade.feedback)
else:
feedback = None
grade_data = most_recent_grade.grade_data
else:
feedback = None
grade_data = None
else:
feedback = None
form = fpctx.page.make_form(
page_context, page_data.data,
answer_data, not may_change_answer)
else:
form = None
feedback = None
# start common flow page generation
# defined at this point:
# form, form_html, may_change_answer, answer_was_graded, feedback
if form is not None and may_change_answer:
form = add_buttons_to_form(form, fpctx, flow_session,
permissions)
show_correctness = None
show_answer = None
shown_feedback = None
if fpctx.page.expects_answer() and answer_was_graded:
show_correctness = (
flow_permission.see_correctness in permissions
or (
(flow_permission.see_correctness_after_completion
in permissions)
and not flow_session.in_progress))
show_answer = flow_permission.see_answer in permissions
if show_correctness or show_answer:
shown_feedback = feedback
elif fpctx.page.expects_answer() and not answer_was_graded:
# Don't show answer yet
pass
else:
show_answer = flow_permission.see_answer in permissions
title = fpctx.page.title(page_context, page_data.data)
body = fpctx.page.body(page_context, page_data.data)
if show_answer:
correct_answer = fpctx.page.correct_answer(
page_context, page_data.data,
answer_data, grade_data)
else:
correct_answer = None
# {{{ render flow page
if form is not None:
form_html = fpctx.page.form_to_html(
pctx.request, page_context, form, answer_data)
else:
form_html = None
args = {
"flow_identifier": fpctx.flow_identifier,
"flow_desc": fpctx.flow_desc,
"ordinal": fpctx.ordinal,
"page_data": fpctx.page_data,
"percentage": int(100*(fpctx.ordinal+1) / flow_session.page_count),
"flow_session": flow_session,
"title": title, "body": body,
"form": form,
"form_html": form_html,
"feedback": shown_feedback,
"correct_answer": correct_answer,
"show_correctness": show_correctness,
"may_change_answer": may_change_answer,
"may_change_graded_answer": (
(flow_permission.change_answer
in permissions)
and flow_session.in_progress),
"will_receive_feedback": will_receive_feedback(permissions),
"show_answer": show_answer,
}
if fpctx.page.expects_answer():
args["max_points"] = fpctx.page.max_points(fpctx.page_data)
return render_course_page(
pctx, "course/flow-page.html", args,
allow_instant_flow_requests=False)
