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from django.db import models, transaction |
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from django.contrib.auth.models import User |
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from django.utils import timezone |
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from django.shortcuts import get_object_or_404 |
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from django.db.models.functions import Length |
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from .assignment import Assignment |
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from .course import Course |
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from .submission import Submission |
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from .studyprogram import StudyProgram |
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class UserProfile(models.Model): |
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user = models.OneToOneField(User, related_name='profile') |
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student_id = models.CharField(max_length=30, blank=True, null=True) |
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courses = models.ManyToManyField( |
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Course, blank=True, related_name='participants', limit_choices_to={'active__exact': True}) |
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study_program = models.ForeignKey( |
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StudyProgram, blank=True, null=True, related_name='students') |
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class Meta: |
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app_label = 'opensubmit' |
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def add_course_safe(self, id): |
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''' |
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Adds a course for the user after conducting a set of sanity checks. |
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Return the title of the course or an exception. |
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''' |
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course = get_object_or_404(Course, pk=int(id), active=True) |
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if course not in self.courses.all(): |
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self.courses.add(course) |
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return course.title |
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def can_see_future(self): |
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''' |
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Decides if this user is allowed to work with assignments that |
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have their starting date in the future. |
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''' |
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return self.user.is_staff |
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def tutor_courses(self): |
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''' |
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Returns the list of courses this user is tutor or owner for. |
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''' |
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tutoring = self.user.courses_tutoring.all().filter(active__exact=True) |
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owning = self.user.courses.all().filter(active__exact=True) |
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result = (tutoring | owning).distinct() |
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return result |
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def user_courses(self): |
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''' |
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Returns the list of courses this user is subscribed for, |
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or owning, or tutoring. |
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This leads to the fact that tutors and owners don't need |
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course membership. |
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''' |
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registered = self.courses.filter(active__exact=True).distinct() |
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return (self.tutor_courses() | registered).distinct() |
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def open_assignments(self): |
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''' |
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Returns the list of open assignments from the |
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viewpoint of this user. |
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''' |
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# Include only assignments with future, or no, hard deadline |
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qs = Assignment.objects.filter(hard_deadline__gt=timezone.now( |
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)) | Assignment.objects.filter(hard_deadline__isnull=True) |
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# Include only assignments that are already published, |
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# as long as you are not a tutor / course owner |
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if not self.can_see_future(): |
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qs = qs.filter(publish_at__lt=timezone.now()) |
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# Include only assignments from courses that you are registered for |
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qs = qs.filter(course__in=self.user_courses()) |
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# Ordering of resulting list |
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qs = qs.annotate(deadline_isnull=Length('soft_deadline')) |
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qs = qs.order_by('-deadline_isnull', 'soft_deadline', |
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'-gradingScheme', 'title') |
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waiting_for_action = [subm.assignment for subm in self.user.authored.all( |
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).exclude(state=Submission.WITHDRAWN)] |
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return [ass for ass in qs if ass not in waiting_for_action] |
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def gone_assignments(self): |
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''' |
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Returns the list of past assignments the user did not submit for |
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before the hard deadline. |
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''' |
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# Include only assignments with past hard deadline |
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qs = Assignment.objects.filter(hard_deadline__lt=timezone.now()) |
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# Include only assignments from courses this user is registered for |
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qs = qs.filter(course__in=self.user_courses()) |
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# Include only assignments this user has no submission for |
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return qs.order_by('-hard_deadline') |
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def db_fixes(user): |
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''' |
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Fix users that already exist and never got a user profile attached. |
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This may be user accounts that were created by the Django Social or manually by the admin. |
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TODO: This belongs into a User post_save handler. |
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''' |
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profile, created = UserProfile.objects.get_or_create(user=user) |
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def user_unicode(self): |
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''' |
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Monkey patch for getting better user name stringification, |
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user proxies did not make the job. |
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Django's custom user model feature would have needed to be introduced |
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before the first syncdb, which does not work for existing installations. |
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''' |
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if self.email: |
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shortened = self.email.split('@')[0] |
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return '%s %s (%s@...)' % (self.first_name, self.last_name, shortened) |
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elif self.first_name or self.last_name: |
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return '%s %s' % (self.first_name, self.last_name) |
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elif self.username: |
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return '%s' % (self.username) |
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else: |
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return 'User %u' % (self.pk) |
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User.__str__ = user_unicode |
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@transaction.atomic |
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def move_user_data(primary, secondary): |
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''' |
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Moves all submissions and other data linked to the secondary user into the primary user. |
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Nothing is deleted here, we just modify foreign user keys. |
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''' |
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# Update all submission authorships of the secondary to the primary |
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submissions = Submission.objects.filter(authors__id=secondary.pk) |
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for subm in submissions: |
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if subm.submitter == secondary: |
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subm.submitter = primary |
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subm.authors.remove(secondary) |
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subm.authors.add(primary) |
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subm.save() |
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# Transfer course registrations |
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try: |
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for course in secondary.profile.courses.all(): |
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primary.profile.courses.add(course) |
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primary.profile.save() |
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except UserProfile.DoesNotExist: |
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# That's a database consistency problem, but he will go away anyway |
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pass |
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troeger /
opensubmit
