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# Author: Matt Giuca, Will Grant
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"""Database utilities and content classes.
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Database Classes and Utilities for Storm ORM
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This module provides all of the classes which map to database tables.
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It also provides miscellaneous utility functions for database interaction.
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from storm.locals import create_database, Store, Int, Unicode, DateTime, \
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Reference, ReferenceSet, Bool, Storm, Desc
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from storm.expr import Select, Max
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from storm.exceptions import NotOneError, IntegrityError
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from ivle.worksheet.rst import rst
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__all__ = ['get_store',
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'Subject', 'Semester', 'Offering', 'Enrolment',
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'ProjectSet', 'Project', 'ProjectGroup', 'ProjectGroupMembership',
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'Assessed', 'ProjectSubmission', 'ProjectExtension',
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'Exercise', 'Worksheet', 'WorksheetExercise',
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'ExerciseSave', 'ExerciseAttempt',
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'TestCase', 'TestSuite', 'TestSuiteVar'
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'AlreadyEnrolledError'
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def _kwarg_init(self, **kwargs):
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'''A sanely ordered list of all of the user's enrolments.'''
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return self._get_enrolments(False)
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def get_projects(self, offering=None, active_only=True):
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"""Find projects that the user can submit.
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This will include projects for offerings in which the user is
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enrolled, as long as the project is not in a project set which has
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groups (ie. if maximum number of group members is 0).
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@param active_only: Whether to only search active offerings.
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@param offering: An optional offering to restrict the search to.
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return Store.of(self).find(Project,
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Project.project_set_id == ProjectSet.id,
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ProjectSet.max_students_per_group == None,
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ProjectSet.offering_id == Offering.id,
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(offering is None) or (Offering.id == offering.id),
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Semester.id == Offering.semester_id,
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(not active_only) or (Semester.state == u'current'),
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Enrolment.offering_id == Offering.id,
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Enrolment.user_id == self.id,
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Enrolment.active == True)
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def hash_password(password):
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"""Hash a password with MD5."""
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return hashlib.md5(password).hexdigest()
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return md5.md5(password).hexdigest()
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def get_by_login(cls, store, login):
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"""Find a user in a store by login name."""
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Get the User from the db associated with a given store and
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return store.find(cls, cls.login == unicode(login)).one()
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def get_svn_url(self, config):
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"""Get the subversion repository URL for this user or group."""
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url = config['urls']['svn_addr']
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path = 'users/%s' % self.login
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return urlparse.urljoin(url, path)
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def get_permissions(self, user, config):
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"""Determine privileges held by a user over this object.
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If the user requesting privileges is this user or an admin,
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they may do everything. Otherwise they may do nothing.
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if user and user.admin or user is self:
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return set(['view_public', 'view', 'edit', 'submit_project'])
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return set(['view_public'])
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# SUBJECTS AND ENROLMENTS #
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class Subject(Storm):
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"""A subject (or course) which is run in some semesters."""
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__storm_table__ = "subject"
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id = Int(primary=True, name="subjectid")
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code = Unicode(name="subj_code")
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name = Unicode(name="subj_name")
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short_name = Unicode(name="subj_short_name")
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offerings = ReferenceSet(id, 'Offering.subject_id')
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def __repr__(self):
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return "<%s '%s'>" % (type(self).__name__, self.short_name)
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def get_permissions(self, user, config):
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"""Determine privileges held by a user over this object.
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If the user requesting privileges is an admin, they may edit.
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Otherwise they may only read.
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def active_offerings(self):
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"""Find active offerings for this subject.
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Return a sequence of currently active offerings for this subject
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(offerings whose semester.state is "current"). There should be 0 or 1
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elements in this sequence, but it's possible there are more.
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return self.offerings.find(Offering.semester_id == Semester.id,
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Semester.state == u'current')
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def offering_for_semester(self, year, semester):
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"""Get the offering for the given year/semester, or None.
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@param year: A string representation of the year.
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@param semester: A string representation of the semester.
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return self.offerings.find(Offering.semester_id == Semester.id,
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Semester.year == unicode(year),
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Semester.url_name == unicode(semester)).one()
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class Semester(Storm):
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"""A semester in which subjects can be run."""
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__storm_table__ = "semester"
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id = Int(primary=True, name="semesterid")
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display_name = Unicode()
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offerings = ReferenceSet(id, 'Offering.semester_id')
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enrolments = ReferenceSet(id,
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'Offering.semester_id',
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'Enrolment.offering_id')
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__init__ = _kwarg_init
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def __repr__(self):
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return "<%s %s/%s>" % (type(self).__name__, self.year, self.code)
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return "<%s %s/%s>" % (type(self).__name__, self.year, self.semester)
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class Offering(Storm):
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"""An offering of a subject in a particular semester."""
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__storm_table__ = "offering"
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id = Int(primary=True, name="offeringid")
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return "<%s %r in %r>" % (type(self).__name__, self.subject,
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def enrol(self, user, role=u'student'):
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"""Enrol a user in this offering.
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Enrolments handle both the staff and student cases. The role controls
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the privileges granted by this enrolment.
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enrolment = Store.of(self).find(Enrolment,
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Enrolment.user_id == user.id,
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Enrolment.offering_id == self.id).one()
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if enrolment is None:
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enrolment = Enrolment(user=user, offering=self)
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self.enrolments.add(enrolment)
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enrolment.active = True
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enrolment.role = role
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def unenrol(self, user):
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'''Unenrol a user from this offering.'''
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enrolment = Store.of(self).find(Enrolment,
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Enrolment.user_id == user.id,
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Enrolment.offering_id == self.id).one()
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Store.of(enrolment).remove(enrolment)
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def get_permissions(self, user, config):
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enrolment = self.get_enrolment(user)
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if enrolment or user.admin:
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if enrolment and enrolment.role == u'tutor':
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perms.add('view_project_submissions')
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# Site-specific policy on the role of tutors
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if config['policy']['tutors_can_enrol_students']:
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perms.add('enrol_student')
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if config['policy']['tutors_can_edit_worksheets']:
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perms.add('edit_worksheets')
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if config['policy']['tutors_can_admin_groups']:
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perms.add('admin_groups')
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if (enrolment and enrolment.role in (u'lecturer')) or user.admin:
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perms.add('view_project_submissions')
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perms.add('admin_groups')
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perms.add('edit_worksheets')
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perms.add('view_worksheet_marks')
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perms.add('edit') # Can edit projects & details
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perms.add('enrol') # Can see enrolment screen at all
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perms.add('enrol_student') # Can enrol students
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perms.add('enrol_tutor') # Can enrol tutors
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perms.add('enrol_lecturer') # Can enrol lecturers
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def get_enrolment(self, user):
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"""Find the user's enrolment in this offering."""
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enrolment = self.enrolments.find(user=user).one()
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def get_members_by_role(self, role):
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return Store.of(self).find(User,
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Enrolment.user_id == User.id,
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Enrolment.offering_id == self.id,
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Enrolment.role == role
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).order_by(User.login)
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return self.get_members_by_role(u'student')
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def get_open_projects_for_user(self, user):
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"""Find all projects currently open to submissions by a user."""
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# XXX: Respect extensions.
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return self.projects.find(Project.deadline > datetime.datetime.now())
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def has_worksheet_cutoff_passed(self, user):
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"""Check whether the worksheet cutoff has passed.
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A user is required, in case we support extensions.
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if self.worksheet_cutoff is None:
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return self.worksheet_cutoff < datetime.datetime.now()
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def clone_worksheets(self, source):
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"""Clone all worksheets from the specified source to this offering."""
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import ivle.worksheet.utils
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for worksheet in source.worksheets:
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newws.seq_no = worksheet.seq_no
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newws.identifier = worksheet.identifier
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newws.name = worksheet.name
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newws.assessable = worksheet.assessable
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newws.published = worksheet.published
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newws.data = worksheet.data
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newws.format = worksheet.format
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newws.offering = self
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Store.of(self).add(newws)
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ivle.worksheet.utils.update_exerciselist(newws)
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def enrol(self, user):
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'''Enrol a user in this offering.'''
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# We'll get a horrible database constraint violation error if we try
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# to add a second enrolment.
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if Store.of(self).find(Enrolment,
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Enrolment.user_id == user.id,
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Enrolment.offering_id == self.id).count() == 1:
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raise AlreadyEnrolledError()
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e = Enrolment(user=user, offering=self, active=True)
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self.enrolments.add(e)
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class Enrolment(Storm):
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"""An enrolment of a user in an offering.
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This represents the roles of both staff and students.
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__storm_table__ = "enrolment"
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__storm_primary__ = "user_id", "offering_id"
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return "<%s %d in %r>" % (type(self).__name__, self.id,
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def get_permissions(self, user, config):
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return self.offering.get_permissions(user, config)
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def get_groups_for_user(self, user):
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"""List all groups in this offering of which the user is a member."""
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return Store.of(self).find(
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ProjectGroupMembership.user_id == user.id,
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ProjectGroupMembership.project_group_id == ProjectGroup.id,
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ProjectGroup.project_set_id == self.id)
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def get_submission_principal(self, user):
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"""Get the principal on behalf of which the user can submit.
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If this is a solo project set, the given user is returned. If
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the user is a member of exactly one group, all the group is
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returned. Otherwise, None is returned.
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groups = self.get_groups_for_user(user)
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if groups.count() == 1:
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return self.max_students_per_group is not None
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"""Get the entities (groups or users) assigned to submit this project.
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This will be a Storm ResultSet.
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#If its a solo project, return everyone in offering
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return self.project_groups
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return self.offering.students
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class DeadlinePassed(Exception):
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"""An exception indicating that a project cannot be submitted because the
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deadline has passed."""
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return "The project deadline has passed"
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class Project(Storm):
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"""A student project for which submissions can be made."""
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__storm_table__ = "project"
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id = Int(name="projectid", primary=True)
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short_name = Unicode()
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synopsis = Unicode()
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project_set_id = Int(name="projectsetid")
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project_set = Reference(project_set_id, ProjectSet.id)
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deadline = DateTime()
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assesseds = ReferenceSet(id, 'Assessed.project_id')
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submissions = ReferenceSet(id,
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'Assessed.project_id',
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'ProjectSubmission.assessed_id')
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__init__ = _kwarg_init
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def __repr__(self):
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return "<%s '%s' in %r>" % (type(self).__name__, self.short_name,
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return "<%s '%s' in %r>" % (type(self).__name__, self.synopsis,
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self.project_set.offering)
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def can_submit(self, principal, user, late=False):
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@param late: If True, does not take the deadline into account.
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return (self in principal.get_projects() and
620
(late or not self.has_deadline_passed(user)))
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def submit(self, principal, path, revision, who, late=False):
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"""Submit a Subversion path and revision to a project.
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@param principal: The owner of the Subversion repository, and the
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entity on behalf of whom the submission is being made
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@param path: A path within that repository to submit.
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@param revision: The revision of that path to submit.
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@param who: The user who is actually making the submission.
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@param late: If True, will not raise a DeadlinePassed exception even
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after the deadline. (Default False.)
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if not self.can_submit(principal, who, late=late):
635
raise DeadlinePassed()
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a = Assessed.get(Store.of(self), principal, self)
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ps = ProjectSubmission()
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# Raise SubmissionError if the path is illegal
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ps.path = ProjectSubmission.test_and_normalise_path(path)
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ps.revision = revision
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ps.date_submitted = datetime.datetime.now()
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def get_permissions(self, user, config):
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return self.project_set.offering.get_permissions(user, config)
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def latest_submissions(self):
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"""Return the latest submission for each Assessed."""
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return Store.of(self).find(ProjectSubmission,
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Assessed.project_id == self.id,
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ProjectSubmission.assessed_id == Assessed.id,
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ProjectSubmission.date_submitted == Select(
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Max(ProjectSubmission.date_submitted),
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ProjectSubmission.assessed_id == Assessed.id,
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tables=ProjectSubmission
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def has_deadline_passed(self, user):
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"""Check whether the deadline has passed."""
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# XXX: Need to respect extensions.
667
return self.deadline < datetime.datetime.now()
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def get_submissions_for_principal(self, principal):
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"""Fetch a ResultSet of all submissions by a particular principal."""
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assessed = Assessed.get(Store.of(self), principal, self)
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return assessed.submissions
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def can_delete(self):
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"""Can only delete if there are no submissions."""
679
return self.submissions.count() == 0
682
"""Delete the project. Fails if can_delete is False."""
683
if not self.can_delete:
684
raise IntegrityError()
685
for assessed in self.assesseds:
687
Store.of(self).remove(self)
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class ProjectGroup(Storm):
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"""A group of students working together on a project."""
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__storm_table__ = "project_group"
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id = Int(name="groupid", primary=True)
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return "<%s %s in %r>" % (type(self).__name__, self.name,
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self.project_set.offering)
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def display_name(self):
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"""Returns the "nice name" of the user or group."""
720
def short_name(self):
721
"""Returns the database "identifier" name of the user or group."""
724
def get_projects(self, offering=None, active_only=True):
725
'''Find projects that the group can submit.
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This will include projects in the project set which owns this group,
728
unless the project set disallows groups (in which case none will be
731
@param active_only: Whether to only search active offerings.
732
@param offering: An optional offering to restrict the search to.
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return Store.of(self).find(Project,
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Project.project_set_id == ProjectSet.id,
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ProjectSet.id == self.project_set.id,
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ProjectSet.max_students_per_group != None,
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ProjectSet.offering_id == Offering.id,
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(offering is None) or (Offering.id == offering.id),
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Semester.id == Offering.semester_id,
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(not active_only) or (Semester.state == u'current'))
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def get_svn_url(self, config):
744
"""Get the subversion repository URL for this user or group."""
745
url = config['urls']['svn_addr']
746
path = 'groups/%s_%s_%s_%s' % (
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self.project_set.offering.subject.short_name,
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self.project_set.offering.semester.year,
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self.project_set.offering.semester.url_name,
752
return urlparse.urljoin(url, path)
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def get_permissions(self, user, config):
755
if user.admin or user in self.members:
756
return set(['submit_project'])
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class ProjectGroupMembership(Storm):
761
"""A student's membership in a project group."""
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__storm_table__ = "group_member"
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__storm_primary__ = "user_id", "project_group_id"
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return "<%s %r in %r>" % (type(self).__name__, self.user,
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self.project_group)
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class Assessed(Storm):
778
"""A composite of a user or group combined with a project.
780
Each project submission and extension refers to an Assessed. It is the
781
sole specifier of the repository and project.
784
__storm_table__ = "assessed"
786
id = Int(name="assessedid", primary=True)
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user_id = Int(name="loginid")
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user = Reference(user_id, User.id)
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project_group_id = Int(name="groupid")
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project_group = Reference(project_group_id, ProjectGroup.id)
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project_id = Int(name="projectid")
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project = Reference(project_id, Project.id)
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extensions = ReferenceSet(id, 'ProjectExtension.assessed_id')
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submissions = ReferenceSet(
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id, 'ProjectSubmission.assessed_id', order_by='date_submitted')
800
return "<%s %r in %r>" % (type(self).__name__,
801
self.user or self.project_group, self.project)
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"""True if the Assessed is a group, False if it is a user."""
806
return self.project_group is not None
810
return self.project_group or self.user
813
def checkout_location(self):
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"""Returns the location of the Subversion workspace for this piece of
815
assessment, relative to each group member's home directory."""
816
subjectname = self.project.project_set.offering.subject.short_name
818
checkout_dir_name = self.principal.short_name
820
checkout_dir_name = "mywork"
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return subjectname + "/" + checkout_dir_name
824
def get(cls, store, principal, project):
825
"""Find or create an Assessed for the given user or group and project.
827
@param principal: The user or group.
828
@param project: The project.
831
if t not in (User, ProjectGroup):
832
raise AssertionError('principal must be User or ProjectGroup')
835
(t is User) or (cls.project_group_id == principal.id),
836
(t is ProjectGroup) or (cls.user_id == principal.id),
837
cls.project_id == project.id).one()
844
a.project_group = principal
851
"""Delete the assessed. Fails if there are any submissions. Deletes
853
if self.submissions.count() > 0:
854
raise IntegrityError()
855
for extension in self.extensions:
857
Store.of(self).remove(self)
859
class ProjectExtension(Storm):
860
"""An extension granted to a user or group on a particular project.
862
The user or group and project are specified by the Assessed.
865
__storm_table__ = "project_extension"
867
id = Int(name="extensionid", primary=True)
868
assessed_id = Int(name="assessedid")
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assessed = Reference(assessed_id, Assessed.id)
871
approver_id = Int(name="approver")
872
approver = Reference(approver_id, User.id)
876
"""Delete the extension."""
877
Store.of(self).remove(self)
879
class SubmissionError(Exception):
880
"""Denotes a validation error during submission."""
883
class ProjectSubmission(Storm):
884
"""A submission from a user or group repository to a particular project.
886
The content of a submission is a single path and revision inside a
887
repository. The repository is that owned by the submission's user and
888
group, while the path and revision are explicit.
890
The user or group and project are specified by the Assessed.
893
__storm_table__ = "project_submission"
895
id = Int(name="submissionid", primary=True)
896
assessed_id = Int(name="assessedid")
897
assessed = Reference(assessed_id, Assessed.id)
900
submitter_id = Int(name="submitter")
901
submitter = Reference(submitter_id, User.id)
902
date_submitted = DateTime()
904
def get_verify_url(self, user):
905
"""Get the URL for verifying this submission, within the account of
907
# If this is a solo project, then self.path will be prefixed with the
908
# subject name. Remove the first path segment.
909
submitpath = self.path[1:] if self.path[:1] == '/' else self.path
910
if not self.assessed.is_group:
911
if '/' in submitpath:
912
submitpath = submitpath.split('/', 1)[1]
915
return "/files/%s/%s/%s?r=%d" % (user.login,
916
self.assessed.checkout_location, submitpath, self.revision)
918
def get_svn_url(self, config):
919
"""Get subversion URL for this submission"""
920
princ = self.assessed.principal
921
base = princ.get_svn_url(config)
922
if self.path.startswith(os.sep):
923
return os.path.join(base,
924
urllib.quote(self.path[1:].encode('utf-8')))
926
return os.path.join(base, urllib.quote(self.path.encode('utf-8')))
928
def get_svn_export_command(self, req):
929
"""Returns a Unix shell command to export a submission"""
930
svn_url = self.get_svn_url(req.config)
931
username = (req.user.login if req.user.login.isalnum() else
932
"'%s'"%req.user.login)
933
export_dir = self.assessed.principal.short_name
934
return "svn export --username %s -r%d '%s' %s"%(req.user.login,
935
self.revision, svn_url, export_dir)
938
def test_and_normalise_path(path):
939
"""Test that path is valid, and normalise it. This prevents possible
940
injections using malicious paths.
941
Returns the updated path, if successful.
942
Raises SubmissionError if invalid.
944
# Ensure the path is absolute to prevent being tacked onto working
946
# Prevent '\n' because it will break all sorts of things.
947
# Prevent '[' and ']' because they can be used to inject into the
949
# Normalise to avoid resulting in ".." path segments.
950
if not os.path.isabs(path):
951
raise SubmissionError("Path is not absolute")
952
if any(c in path for c in "\n[]"):
953
raise SubmissionError("Path must not contain '\\n', '[' or ']'")
954
return os.path.normpath(path)
958
"""True if the project was submitted late."""
959
return self.days_late > 0
963
"""The number of days the project was submitted late (rounded up), or
965
# XXX: Need to respect extensions.
967
(self.date_submitted - self.assessed.project.deadline).days + 1)
969
368
# WORKSHEETS AND EXERCISES #
971
370
class Exercise(Storm):
972
"""An exercise for students to complete in a worksheet.
974
An exercise may be present in any number of worksheets.
977
__storm_table__ = "exercise"
978
id = Unicode(primary=True, name="identifier")
980
description = Unicode()
981
_description_xhtml_cache = Unicode(name='description_xhtml_cache')
987
worksheet_exercises = ReferenceSet(id,
988
'WorksheetExercise.exercise_id')
371
# Note: Table "problem" is called "Exercise" in the Object layer, since
372
# it's called that everywhere else.
373
__storm_table__ = "problem"
375
id = Int(primary=True, name="problemid")
376
name = Unicode(name="identifier")
990
379
worksheets = ReferenceSet(id,
991
380
'WorksheetExercise.exercise_id',
996
test_suites = ReferenceSet(id,
997
'TestSuite.exercise_id',
1000
385
__init__ = _kwarg_init
1002
387
def __repr__(self):
1003
388
return "<%s %s>" % (type(self).__name__, self.name)
1005
def get_permissions(self, user, config):
1006
return self.global_permissions(user, config)
1009
def global_permissions(user, config):
1010
"""Gets the set of permissions this user has over *all* exercises.
1011
This is used to determine who may view the exercises list, and create
1015
if user is not None:
1019
elif u'lecturer' in set((e.role for e in user.active_enrolments)):
1022
elif (config['policy']['tutors_can_edit_worksheets']
1023
and u'tutor' in set((e.role for e in user.active_enrolments))):
1024
# Site-specific policy on the role of tutors
1030
def _cache_description_xhtml(self, invalidate=False):
1031
# Don't regenerate an existing cache unless forced.
1032
if self._description_xhtml_cache is not None and not invalidate:
1035
if self.description:
1036
self._description_xhtml_cache = rst(self.description)
1038
self._description_xhtml_cache = None
1041
def description_xhtml(self):
1042
"""The XHTML exercise description, converted from reStructuredText."""
1043
self._cache_description_xhtml()
1044
return self._description_xhtml_cache
1046
def set_description(self, description):
1047
self.description = description
1048
self._cache_description_xhtml(invalidate=True)
1051
"""Deletes the exercise, providing it has no associated worksheets."""
1052
if (self.worksheet_exercises.count() > 0):
1053
raise IntegrityError()
1054
for suite in self.test_suites:
1056
Store.of(self).remove(self)
391
def get_by_name(cls, store, name):
393
Get the Exercise from the db associated with a given store and name.
394
If the exercise is not in the database, creates it and inserts it
397
ex = store.find(cls, cls.name == unicode(name)).one()
400
ex = Exercise(name=unicode(name))
1058
405
class Worksheet(Storm):
1059
"""A worksheet with exercises for students to complete.
1061
Worksheets are owned by offerings.
1064
406
__storm_table__ = "worksheet"
1066
408
id = Int(primary=True, name="worksheetid")
1067
offering_id = Int(name="offeringid")
1068
identifier = Unicode()
409
# XXX subject is not linked to a Subject object. This is a property of
410
# the database, and will be refactored.
412
name = Unicode(name="identifier")
1070
413
assessable = Bool()
1073
_data_xhtml_cache = Unicode(name='data_xhtml_cache')
1077
attempts = ReferenceSet(id, "ExerciseAttempt.worksheetid")
1078
offering = Reference(offering_id, 'Offering.id')
1080
all_worksheet_exercises = ReferenceSet(id,
416
exercises = ReferenceSet(id,
417
'WorksheetExercise.worksheet_id',
418
'WorksheetExercise.exercise_id',
420
# Use worksheet_exercises to get access to the WorksheetExercise objects
421
# binding worksheets to exercises. This is required to access the
423
worksheet_exercises = ReferenceSet(id,
1081
424
'WorksheetExercise.worksheet_id')
1083
# Use worksheet_exercises to get access to the *active* WorksheetExercise
1084
# objects binding worksheets to exercises. This is required to access the
1088
def worksheet_exercises(self):
1089
return self.all_worksheet_exercises.find(active=True)
1091
426
__init__ = _kwarg_init
1093
428
def __repr__(self):
1094
429
return "<%s %s>" % (type(self).__name__, self.name)
1096
def remove_all_exercises(self):
1097
"""Remove all exercises from this worksheet.
431
# XXX Refactor this - make it an instance method of Subject rather than a
432
# class method of Worksheet. Can't do that now because Subject isn't
433
# linked referentially to the Worksheet.
435
def get_by_name(cls, store, subjectname, worksheetname):
437
Get the Worksheet from the db associated with a given store, subject
438
name and worksheet name.
440
return store.find(cls, cls.subject == unicode(subjectname),
441
cls.name == unicode(worksheetname)).one()
443
def remove_all_exercises(self, store):
445
Remove all exercises from this worksheet.
1099
446
This does not delete the exercises themselves. It just removes them
1100
447
from the worksheet.
1102
store = Store.of(self)
1103
for ws_ex in self.all_worksheet_exercises:
1104
if ws_ex.saves.count() > 0 or ws_ex.attempts.count() > 0:
1105
raise IntegrityError()
1106
449
store.find(WorksheetExercise,
1107
450
WorksheetExercise.worksheet == self).remove()
1109
def get_permissions(self, user, config):
1110
offering_perms = self.offering.get_permissions(user, config)
1114
# Anybody who can view an offering can view a published
1116
if 'view' in offering_perms and self.published:
1119
# Any worksheet editors can both view and edit.
1120
if 'edit_worksheets' in offering_perms:
1126
def _cache_data_xhtml(self, invalidate=False):
1127
# Don't regenerate an existing cache unless forced.
1128
if self._data_xhtml_cache is not None and not invalidate:
1131
if self.format == u'rst':
1132
self._data_xhtml_cache = rst(self.data)
1134
self._data_xhtml_cache = None
1137
def data_xhtml(self):
1138
"""The XHTML of this worksheet, converted from rST if required."""
1139
# Update the rST -> XHTML cache, if required.
1140
self._cache_data_xhtml()
1142
if self.format == u'rst':
1143
return self._data_xhtml_cache
1147
def set_data(self, data):
1149
self._cache_data_xhtml(invalidate=True)
1152
"""Deletes the worksheet, provided it has no attempts on any exercises.
1154
Returns True if delete succeeded, or False if this worksheet has
1155
attempts attached."""
1156
for ws_ex in self.all_worksheet_exercises:
1157
if ws_ex.saves.count() > 0 or ws_ex.attempts.count() > 0:
1158
raise IntegrityError()
1160
self.remove_all_exercises()
1161
Store.of(self).remove(self)
1163
452
class WorksheetExercise(Storm):
1164
"""A link between a worksheet and one of its exercises.
1166
These may be marked optional, in which case the exercise does not count
1167
for marking purposes. The sequence number is used to order the worksheet
1171
__storm_table__ = "worksheet_exercise"
1173
id = Int(primary=True, name="ws_ex_id")
453
__storm_table__ = "worksheet_problem"
454
__storm_primary__ = "worksheet_id", "exercise_id"
1175
456
worksheet_id = Int(name="worksheetid")
1176
457
worksheet = Reference(worksheet_id, Worksheet.id)
1177
exercise_id = Unicode(name="exerciseid")
458
exercise_id = Int(name="problemid")
1178
459
exercise = Reference(exercise_id, Exercise.id)
1179
460
optional = Bool()
1183
saves = ReferenceSet(id, "ExerciseSave.ws_ex_id")
1184
attempts = ReferenceSet(id, "ExerciseAttempt.ws_ex_id")
1186
462
__init__ = _kwarg_init
1188
464
def __repr__(self):
1189
465
return "<%s %s in %s>" % (type(self).__name__, self.exercise.name,
1190
self.worksheet.identifier)
1192
def get_permissions(self, user, config):
1193
return self.worksheet.get_permissions(user, config)
1196
468
class ExerciseSave(Storm):
1197
"""A potential exercise solution submitted by a user for storage.
1199
This is not an actual tested attempt at an exercise, it's just a save of
1200
the editing session.
1203
__storm_table__ = "exercise_save"
1204
__storm_primary__ = "ws_ex_id", "user_id"
1206
ws_ex_id = Int(name="ws_ex_id")
1207
worksheet_exercise = Reference(ws_ex_id, "WorksheetExercise.id")
470
Represents a potential solution to an exercise that a user has submitted
471
to the server for storage.
472
A basic ExerciseSave is just the current saved text for this exercise for
473
this user (doesn't count towards their attempts).
474
ExerciseSave may be extended with additional semantics (such as
477
__storm_table__ = "problem_save"
478
__storm_primary__ = "exercise_id", "user_id", "date"
480
exercise_id = Int(name="problemid")
481
exercise = Reference(exercise_id, Exercise.id)
1209
482
user_id = Int(name="loginid")
1210
483
user = Reference(user_id, User.id)
1211
484
date = DateTime()
1216
489
def __repr__(self):
1217
490
return "<%s %s by %s at %s>" % (type(self).__name__,
1218
self.worksheet_exercise.exercise.name, self.user.login,
1219
self.date.strftime("%c"))
491
self.exercise.name, self.user.login, self.date.strftime("%c"))
1221
493
class ExerciseAttempt(ExerciseSave):
1222
"""An attempt at solving an exercise.
1224
This is a special case of ExerciseSave, used when the user submits a
1225
candidate solution. Like an ExerciseSave, it constitutes exercise solution
1228
In addition, it contains information about the result of the submission:
1230
- complete - True if this submission was successful, rendering this
1231
exercise complete for this user in this worksheet.
1232
- active - True if this submission is "active" (usually true).
1233
Submissions may be de-activated by privileged users for
1234
special reasons, and then they won't count (either as a
1235
penalty or success), but will still be stored.
1238
__storm_table__ = "exercise_attempt"
1239
__storm_primary__ = "ws_ex_id", "user_id", "date"
495
An ExerciseAttempt is a special case of an ExerciseSave. Like an
496
ExerciseSave, it constitutes exercise solution data that the user has
497
submitted to the server for storage.
498
In addition, it contains additional information about the submission.
499
complete - True if this submission was successful, rendering this exercise
500
complete for this user.
501
active - True if this submission is "active" (usually true). Submissions
502
may be de-activated by privileged users for special reasons, and then
503
they won't count (either as a penalty or success), but will still be
506
__storm_table__ = "problem_attempt"
507
__storm_primary__ = "exercise_id", "user_id", "date"
1241
509
# The "text" field is the same but has a different name in the DB table
1242
510
# for some reason.
1243
511
text = Unicode(name="attempt")
1244
512
complete = Bool()
1247
def get_permissions(self, user, config):
1248
return set(['view']) if user is self.user else set()
1250
class TestSuite(Storm):
1251
"""A container to group an exercise's test cases.
1253
The test suite contains some information on how to test. The function to
1254
test, variables to set and stdin data are stored here.
1257
__storm_table__ = "test_suite"
1258
__storm_primary__ = "exercise_id", "suiteid"
1261
exercise_id = Unicode(name="exerciseid")
1262
description = Unicode()
1264
function = Unicode()
1266
exercise = Reference(exercise_id, Exercise.id)
1267
test_cases = ReferenceSet(suiteid, 'TestCase.suiteid', order_by="seq_no")
1268
variables = ReferenceSet(suiteid, 'TestSuiteVar.suiteid', order_by='arg_no')
1271
"""Delete this suite, without asking questions."""
1272
for variable in self.variables:
1274
for test_case in self.test_cases:
1276
Store.of(self).remove(self)
1278
class TestCase(Storm):
1279
"""A container for actual tests (see TestCasePart), inside a test suite.
1281
It is the lowest level shown to students on their pass/fail status."""
1283
__storm_table__ = "test_case"
1284
__storm_primary__ = "testid", "suiteid"
1288
suite = Reference(suiteid, "TestSuite.suiteid")
1291
test_default = Unicode() # Currently unused - only used for file matching.
1294
parts = ReferenceSet(testid, "TestCasePart.testid")
1296
__init__ = _kwarg_init
1299
for part in self.parts:
1301
Store.of(self).remove(self)
1303
class TestSuiteVar(Storm):
1304
"""A variable used by an exercise test suite.
1306
This may represent a function argument or a normal variable.
1309
__storm_table__ = "suite_variable"
1310
__storm_primary__ = "varid"
1314
var_name = Unicode()
1315
var_value = Unicode()
1316
var_type = Unicode()
1319
suite = Reference(suiteid, "TestSuite.suiteid")
1321
__init__ = _kwarg_init
1324
Store.of(self).remove(self)
1326
class TestCasePart(Storm):
1327
"""An actual piece of code to test an exercise solution."""
1329
__storm_table__ = "test_case_part"
1330
__storm_primary__ = "partid"
1335
part_type = Unicode()
1336
test_type = Unicode()
1338
filename = Unicode()
1340
test = Reference(testid, "TestCase.testid")
1342
__init__ = _kwarg_init
1345
Store.of(self).remove(self)
added
removed
ivle/database.py
