1
# IVLE - Informatics Virtual Learning Environment
2
# Copyright (C) 2007-2009 The University of Melbourne
4
# This program is free software; you can redistribute it and/or modify
5
# it under the terms of the GNU General Public License as published by
6
# the Free Software Foundation; either version 2 of the License, or
7
# (at your option) any later version.
9
# This program is distributed in the hope that it will be useful,
10
# but WITHOUT ANY WARRANTY; without even the implied warranty of
11
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12
# GNU General Public License for more details.
14
# You should have received a copy of the GNU General Public License
15
# along with this program; if not, write to the Free Software
16
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
# Author: Matt Giuca, Will Grant
20
"""Database utilities and content classes.
22
This module provides all of the classes which map to database tables.
23
It also provides miscellaneous utility functions for database interaction.
30
from storm.locals import create_database, Store, Int, Unicode, DateTime, \
31
Reference, ReferenceSet, Bool, Storm, Desc
32
from storm.expr import Select, Max
33
from storm.exceptions import NotOneError, IntegrityError
35
from ivle.worksheet.rst import rst
37
__all__ = ['get_store',
39
'Subject', 'Semester', 'Offering', 'Enrolment',
40
'ProjectSet', 'Project', 'ProjectGroup', 'ProjectGroupMembership',
41
'Assessed', 'ProjectSubmission', 'ProjectExtension',
42
'Exercise', 'Worksheet', 'WorksheetExercise',
43
'ExerciseSave', 'ExerciseAttempt',
44
'TestCase', 'TestSuite', 'TestSuiteVar'
47
def _kwarg_init(self, **kwargs):
48
for k,v in kwargs.items():
49
if k.startswith('_') or not hasattr(self.__class__, k):
50
raise TypeError("%s got an unexpected keyword argument '%s'"
51
% (self.__class__.__name__, k))
54
def get_conn_string(config):
55
"""Create a Storm connection string to the IVLE database
57
@param config: The IVLE configuration.
61
if config['database']['username']:
62
clusterstr += config['database']['username']
63
if config['database']['password']:
64
clusterstr += ':' + config['database']['password']
67
host = config['database']['host'] or 'localhost'
68
port = config['database']['port'] or 5432
70
clusterstr += '%s:%d' % (host, port)
72
return "postgres://%s/%s" % (clusterstr, config['database']['name'])
74
def get_store(config):
75
"""Create a Storm store connected to the IVLE database.
77
@param config: The IVLE configuration.
79
return Store(create_database(get_conn_string(config)))
84
"""An IVLE user account."""
85
__storm_table__ = "login"
87
id = Int(primary=True, name="loginid")
96
last_login = DateTime()
100
studentid = Unicode()
103
__init__ = _kwarg_init
106
return "<%s '%s'>" % (type(self).__name__, self.login)
108
def authenticate(self, password):
109
"""Validate a given password against this user.
111
Returns True if the given password matches the password hash for this
112
User, False if it doesn't match, and None if there is no hash for the
115
if self.passhash is None:
117
return self.hash_password(password) == self.passhash
120
def display_name(self):
121
"""Returns the "nice name" of the user or group."""
125
def short_name(self):
126
"""Returns the database "identifier" name of the user or group."""
130
def password_expired(self):
131
fieldval = self.pass_exp
132
return fieldval is not None and datetime.datetime.now() > fieldval
135
def account_expired(self):
136
fieldval = self.acct_exp
137
return fieldval is not None and datetime.datetime.now() > fieldval
141
return self.state == 'enabled' and not self.account_expired
143
def _get_enrolments(self, justactive):
144
return Store.of(self).find(Enrolment,
145
Enrolment.user_id == self.id,
146
(Enrolment.active == True) if justactive else True,
147
Enrolment.offering_id == Offering.id,
148
Offering.semester_id == Semester.id,
149
Offering.subject_id == Subject.id).order_by(
151
Desc(Semester.semester),
155
def _set_password(self, password):
159
self.passhash = unicode(User.hash_password(password))
160
password = property(fset=_set_password)
164
return Store.of(self).find(Subject,
165
Enrolment.user_id == self.id,
166
Enrolment.active == True,
167
Offering.id == Enrolment.offering_id,
168
Subject.id == Offering.subject_id).config(distinct=True)
170
# TODO: Invitations should be listed too?
171
def get_groups(self, offering=None):
172
"""Get groups of which this user is a member.
174
@param offering: An optional offering to restrict the search to.
177
ProjectGroupMembership.user_id == self.id,
178
ProjectGroup.id == ProjectGroupMembership.project_group_id,
182
ProjectSet.offering_id == offering.id,
183
ProjectGroup.project_set_id == ProjectSet.id,
185
return Store.of(self).find(ProjectGroup, *preds)
189
return self.get_groups()
192
def active_enrolments(self):
193
'''A sanely ordered list of the user's active enrolments.'''
194
return self._get_enrolments(True)
197
def enrolments(self):
198
'''A sanely ordered list of all of the user's enrolments.'''
199
return self._get_enrolments(False)
201
def get_projects(self, offering=None, active_only=True):
202
"""Find projects that the user can submit.
204
This will include projects for offerings in which the user is
205
enrolled, as long as the project is not in a project set which has
206
groups (ie. if maximum number of group members is 0).
208
@param active_only: Whether to only search active offerings.
209
@param offering: An optional offering to restrict the search to.
211
return Store.of(self).find(Project,
212
Project.project_set_id == ProjectSet.id,
213
ProjectSet.max_students_per_group == None,
214
ProjectSet.offering_id == Offering.id,
215
(offering is None) or (Offering.id == offering.id),
216
Semester.id == Offering.semester_id,
217
(not active_only) or (Semester.state == u'current'),
218
Enrolment.offering_id == Offering.id,
219
Enrolment.user_id == self.id,
220
Enrolment.active == True)
223
def hash_password(password):
224
"""Hash a password with MD5."""
225
return hashlib.md5(password).hexdigest()
228
def get_by_login(cls, store, login):
229
"""Find a user in a store by login name."""
230
return store.find(cls, cls.login == unicode(login)).one()
232
def get_permissions(self, user, config):
233
"""Determine privileges held by a user over this object.
235
If the user requesting privileges is this user or an admin,
236
they may do everything. Otherwise they may do nothing.
238
if user and user.admin or user is self:
239
return set(['view_public', 'view', 'edit', 'submit_project'])
241
return set(['view_public'])
243
# SUBJECTS AND ENROLMENTS #
245
class Subject(Storm):
246
"""A subject (or course) which is run in some semesters."""
248
__storm_table__ = "subject"
250
id = Int(primary=True, name="subjectid")
251
code = Unicode(name="subj_code")
252
name = Unicode(name="subj_name")
253
short_name = Unicode(name="subj_short_name")
255
offerings = ReferenceSet(id, 'Offering.subject_id')
257
__init__ = _kwarg_init
260
return "<%s '%s'>" % (type(self).__name__, self.short_name)
262
def get_permissions(self, user, config):
263
"""Determine privileges held by a user over this object.
265
If the user requesting privileges is an admin, they may edit.
266
Otherwise they may only read.
275
def active_offerings(self):
276
"""Find active offerings for this subject.
278
Return a sequence of currently active offerings for this subject
279
(offerings whose semester.state is "current"). There should be 0 or 1
280
elements in this sequence, but it's possible there are more.
282
return self.offerings.find(Offering.semester_id == Semester.id,
283
Semester.state == u'current')
285
def offering_for_semester(self, year, semester):
286
"""Get the offering for the given year/semester, or None.
288
@param year: A string representation of the year.
289
@param semester: A string representation of the semester.
291
return self.offerings.find(Offering.semester_id == Semester.id,
292
Semester.year == unicode(year),
293
Semester.semester == unicode(semester)).one()
295
class Semester(Storm):
296
"""A semester in which subjects can be run."""
298
__storm_table__ = "semester"
300
id = Int(primary=True, name="semesterid")
305
offerings = ReferenceSet(id, 'Offering.semester_id')
306
enrolments = ReferenceSet(id,
307
'Offering.semester_id',
309
'Enrolment.offering_id')
311
__init__ = _kwarg_init
314
return "<%s %s/%s>" % (type(self).__name__, self.year, self.semester)
316
class Offering(Storm):
317
"""An offering of a subject in a particular semester."""
319
__storm_table__ = "offering"
321
id = Int(primary=True, name="offeringid")
322
subject_id = Int(name="subject")
323
subject = Reference(subject_id, Subject.id)
324
semester_id = Int(name="semesterid")
325
semester = Reference(semester_id, Semester.id)
326
description = Unicode()
328
show_worksheet_marks = Bool()
329
worksheet_cutoff = DateTime()
330
groups_student_permissions = Unicode()
332
enrolments = ReferenceSet(id, 'Enrolment.offering_id')
333
members = ReferenceSet(id,
334
'Enrolment.offering_id',
337
project_sets = ReferenceSet(id, 'ProjectSet.offering_id')
338
projects = ReferenceSet(id,
339
'ProjectSet.offering_id',
341
'Project.project_set_id')
343
worksheets = ReferenceSet(id,
344
'Worksheet.offering_id',
348
__init__ = _kwarg_init
351
return "<%s %r in %r>" % (type(self).__name__, self.subject,
354
def enrol(self, user, role=u'student'):
355
"""Enrol a user in this offering.
357
Enrolments handle both the staff and student cases. The role controls
358
the privileges granted by this enrolment.
360
enrolment = Store.of(self).find(Enrolment,
361
Enrolment.user_id == user.id,
362
Enrolment.offering_id == self.id).one()
364
if enrolment is None:
365
enrolment = Enrolment(user=user, offering=self)
366
self.enrolments.add(enrolment)
368
enrolment.active = True
369
enrolment.role = role
371
def unenrol(self, user):
372
'''Unenrol a user from this offering.'''
373
enrolment = Store.of(self).find(Enrolment,
374
Enrolment.user_id == user.id,
375
Enrolment.offering_id == self.id).one()
376
Store.of(enrolment).remove(enrolment)
378
def get_permissions(self, user, config):
381
enrolment = self.get_enrolment(user)
382
if enrolment or user.admin:
384
if enrolment and enrolment.role == u'tutor':
385
perms.add('view_project_submissions')
386
# Site-specific policy on the role of tutors
387
if config['policy']['tutors_can_enrol_students']:
389
perms.add('enrol_student')
390
if config['policy']['tutors_can_edit_worksheets']:
391
perms.add('edit_worksheets')
392
if config['policy']['tutors_can_admin_groups']:
393
perms.add('admin_groups')
394
if (enrolment and enrolment.role in (u'lecturer')) or user.admin:
395
perms.add('view_project_submissions')
396
perms.add('admin_groups')
397
perms.add('edit_worksheets')
398
perms.add('view_worksheet_marks')
399
perms.add('edit') # Can edit projects & details
400
perms.add('enrol') # Can see enrolment screen at all
401
perms.add('enrol_student') # Can enrol students
402
perms.add('enrol_tutor') # Can enrol tutors
404
perms.add('enrol_lecturer') # Can enrol lecturers
407
def get_enrolment(self, user):
408
"""Find the user's enrolment in this offering."""
410
enrolment = self.enrolments.find(user=user).one()
416
def get_members_by_role(self, role):
417
return Store.of(self).find(User,
418
Enrolment.user_id == User.id,
419
Enrolment.offering_id == self.id,
420
Enrolment.role == role
421
).order_by(User.login)
425
return self.get_members_by_role(u'student')
427
def get_open_projects_for_user(self, user):
428
"""Find all projects currently open to submissions by a user."""
429
# XXX: Respect extensions.
430
return self.projects.find(Project.deadline > datetime.datetime.now())
432
def clone_worksheets(self, source):
433
"""Clone all worksheets from the specified source to this offering."""
434
import ivle.worksheet.utils
435
for worksheet in source.worksheets:
437
newws.seq_no = worksheet.seq_no
438
newws.identifier = worksheet.identifier
439
newws.name = worksheet.name
440
newws.assessable = worksheet.assessable
441
newws.published = worksheet.published
442
newws.data = worksheet.data
443
newws.format = worksheet.format
444
newws.offering = self
445
Store.of(self).add(newws)
446
ivle.worksheet.utils.update_exerciselist(newws)
449
class Enrolment(Storm):
450
"""An enrolment of a user in an offering.
452
This represents the roles of both staff and students.
455
__storm_table__ = "enrolment"
456
__storm_primary__ = "user_id", "offering_id"
458
user_id = Int(name="loginid")
459
user = Reference(user_id, User.id)
460
offering_id = Int(name="offeringid")
461
offering = Reference(offering_id, Offering.id)
468
return Store.of(self).find(ProjectGroup,
469
ProjectSet.offering_id == self.offering.id,
470
ProjectGroup.project_set_id == ProjectSet.id,
471
ProjectGroupMembership.project_group_id == ProjectGroup.id,
472
ProjectGroupMembership.user_id == self.user.id)
474
__init__ = _kwarg_init
477
return "<%s %r in %r>" % (type(self).__name__, self.user,
480
def get_permissions(self, user, config):
481
# A user can edit any enrolment that they could have created.
483
if ('enrol_' + str(self.role)) in self.offering.get_permissions(
489
"""Delete this enrolment."""
490
Store.of(self).remove(self)
495
class ProjectSet(Storm):
496
"""A set of projects that share common groups.
498
Each student project group is attached to a project set. The group is
499
valid for all projects in the group's set.
502
__storm_table__ = "project_set"
504
id = Int(name="projectsetid", primary=True)
505
offering_id = Int(name="offeringid")
506
offering = Reference(offering_id, Offering.id)
507
max_students_per_group = Int()
509
projects = ReferenceSet(id, 'Project.project_set_id')
510
project_groups = ReferenceSet(id, 'ProjectGroup.project_set_id')
512
__init__ = _kwarg_init
515
return "<%s %d in %r>" % (type(self).__name__, self.id,
518
def get_permissions(self, user, config):
519
return self.offering.get_permissions(user, config)
521
def get_groups_for_user(self, user):
522
"""List all groups in this offering of which the user is a member."""
524
return Store.of(self).find(
526
ProjectGroupMembership.user_id == user.id,
527
ProjectGroupMembership.project_group_id == ProjectGroup.id,
528
ProjectGroup.project_set_id == self.id)
530
def get_submission_principal(self, user):
531
"""Get the principal on behalf of which the user can submit.
533
If this is a solo project set, the given user is returned. If
534
the user is a member of exactly one group, all the group is
535
returned. Otherwise, None is returned.
538
groups = self.get_groups_for_user(user)
539
if groups.count() == 1:
548
return self.max_students_per_group is not None
552
"""Get the entities (groups or users) assigned to submit this project.
554
This will be a Storm ResultSet.
556
#If its a solo project, return everyone in offering
558
return self.project_groups
560
return self.offering.students
562
class DeadlinePassed(Exception):
563
"""An exception indicating that a project cannot be submitted because the
564
deadline has passed."""
568
return "The project deadline has passed"
570
class Project(Storm):
571
"""A student project for which submissions can be made."""
573
__storm_table__ = "project"
575
id = Int(name="projectid", primary=True)
577
short_name = Unicode()
580
project_set_id = Int(name="projectsetid")
581
project_set = Reference(project_set_id, ProjectSet.id)
582
deadline = DateTime()
584
assesseds = ReferenceSet(id, 'Assessed.project_id')
585
submissions = ReferenceSet(id,
586
'Assessed.project_id',
588
'ProjectSubmission.assessed_id')
590
__init__ = _kwarg_init
593
return "<%s '%s' in %r>" % (type(self).__name__, self.short_name,
594
self.project_set.offering)
596
def can_submit(self, principal, user):
597
return (self in principal.get_projects() and
598
not self.has_deadline_passed(user))
600
def submit(self, principal, path, revision, who):
601
"""Submit a Subversion path and revision to a project.
603
@param principal: The owner of the Subversion repository, and the
604
entity on behalf of whom the submission is being made
605
@param path: A path within that repository to submit.
606
@param revision: The revision of that path to submit.
607
@param who: The user who is actually making the submission.
610
if not self.can_submit(principal, who):
611
raise DeadlinePassed()
613
a = Assessed.get(Store.of(self), principal, self)
614
ps = ProjectSubmission()
615
# Raise SubmissionError if the path is illegal
616
ps.path = ProjectSubmission.test_and_normalise_path(path)
617
ps.revision = revision
618
ps.date_submitted = datetime.datetime.now()
624
def get_permissions(self, user, config):
625
return self.project_set.offering.get_permissions(user, config)
628
def latest_submissions(self):
629
"""Return the latest submission for each Assessed."""
630
return Store.of(self).find(ProjectSubmission,
631
Assessed.project_id == self.id,
632
ProjectSubmission.assessed_id == Assessed.id,
633
ProjectSubmission.date_submitted == Select(
634
Max(ProjectSubmission.date_submitted),
635
ProjectSubmission.assessed_id == Assessed.id,
636
tables=ProjectSubmission
640
def has_deadline_passed(self, user):
641
"""Check whether the deadline has passed."""
642
# XXX: Need to respect extensions.
643
return self.deadline < datetime.datetime.now()
645
def get_submissions_for_principal(self, principal):
646
"""Fetch a ResultSet of all submissions by a particular principal."""
647
assessed = Assessed.get(Store.of(self), principal, self)
650
return assessed.submissions
654
class ProjectGroup(Storm):
655
"""A group of students working together on a project."""
657
__storm_table__ = "project_group"
659
id = Int(name="groupid", primary=True)
660
name = Unicode(name="groupnm")
661
project_set_id = Int(name="projectsetid")
662
project_set = Reference(project_set_id, ProjectSet.id)
664
created_by_id = Int(name="createdby")
665
created_by = Reference(created_by_id, User.id)
668
members = ReferenceSet(id,
669
"ProjectGroupMembership.project_group_id",
670
"ProjectGroupMembership.user_id",
673
__init__ = _kwarg_init
676
return "<%s %s in %r>" % (type(self).__name__, self.name,
677
self.project_set.offering)
680
def display_name(self):
681
"""Returns the "nice name" of the user or group."""
685
def short_name(self):
686
"""Returns the database "identifier" name of the user or group."""
689
def get_projects(self, offering=None, active_only=True):
690
'''Find projects that the group can submit.
692
This will include projects in the project set which owns this group,
693
unless the project set disallows groups (in which case none will be
696
@param active_only: Whether to only search active offerings.
697
@param offering: An optional offering to restrict the search to.
699
return Store.of(self).find(Project,
700
Project.project_set_id == ProjectSet.id,
701
ProjectSet.id == self.project_set.id,
702
ProjectSet.max_students_per_group != None,
703
ProjectSet.offering_id == Offering.id,
704
(offering is None) or (Offering.id == offering.id),
705
Semester.id == Offering.semester_id,
706
(not active_only) or (Semester.state == u'current'))
709
def get_permissions(self, user, config):
710
if user.admin or user in self.members:
711
return set(['submit_project'])
715
class ProjectGroupMembership(Storm):
716
"""A student's membership in a project group."""
718
__storm_table__ = "group_member"
719
__storm_primary__ = "user_id", "project_group_id"
721
user_id = Int(name="loginid")
722
user = Reference(user_id, User.id)
723
project_group_id = Int(name="groupid")
724
project_group = Reference(project_group_id, ProjectGroup.id)
726
__init__ = _kwarg_init
729
return "<%s %r in %r>" % (type(self).__name__, self.user,
732
class Assessed(Storm):
733
"""A composite of a user or group combined with a project.
735
Each project submission and extension refers to an Assessed. It is the
736
sole specifier of the repository and project.
739
__storm_table__ = "assessed"
741
id = Int(name="assessedid", primary=True)
742
user_id = Int(name="loginid")
743
user = Reference(user_id, User.id)
744
project_group_id = Int(name="groupid")
745
project_group = Reference(project_group_id, ProjectGroup.id)
747
project_id = Int(name="projectid")
748
project = Reference(project_id, Project.id)
750
extensions = ReferenceSet(id, 'ProjectExtension.assessed_id')
751
submissions = ReferenceSet(
752
id, 'ProjectSubmission.assessed_id', order_by='date_submitted')
755
return "<%s %r in %r>" % (type(self).__name__,
756
self.user or self.project_group, self.project)
760
"""True if the Assessed is a group, False if it is a user."""
761
return self.project_group is not None
765
return self.project_group or self.user
768
def checkout_location(self):
769
"""Returns the location of the Subversion workspace for this piece of
770
assessment, relative to each group member's home directory."""
771
subjectname = self.project.project_set.offering.subject.short_name
773
checkout_dir_name = self.principal.short_name
775
checkout_dir_name = "mywork"
776
return subjectname + "/" + checkout_dir_name
779
def get(cls, store, principal, project):
780
"""Find or create an Assessed for the given user or group and project.
782
@param principal: The user or group.
783
@param project: The project.
786
if t not in (User, ProjectGroup):
787
raise AssertionError('principal must be User or ProjectGroup')
790
(t is User) or (cls.project_group_id == principal.id),
791
(t is ProjectGroup) or (cls.user_id == principal.id),
792
cls.project_id == project.id).one()
799
a.project_group = principal
806
class ProjectExtension(Storm):
807
"""An extension granted to a user or group on a particular project.
809
The user or group and project are specified by the Assessed.
812
__storm_table__ = "project_extension"
814
id = Int(name="extensionid", primary=True)
815
assessed_id = Int(name="assessedid")
816
assessed = Reference(assessed_id, Assessed.id)
817
deadline = DateTime()
818
approver_id = Int(name="approver")
819
approver = Reference(approver_id, User.id)
822
class SubmissionError(Exception):
823
"""Denotes a validation error during submission."""
826
class ProjectSubmission(Storm):
827
"""A submission from a user or group repository to a particular project.
829
The content of a submission is a single path and revision inside a
830
repository. The repository is that owned by the submission's user and
831
group, while the path and revision are explicit.
833
The user or group and project are specified by the Assessed.
836
__storm_table__ = "project_submission"
838
id = Int(name="submissionid", primary=True)
839
assessed_id = Int(name="assessedid")
840
assessed = Reference(assessed_id, Assessed.id)
843
submitter_id = Int(name="submitter")
844
submitter = Reference(submitter_id, User.id)
845
date_submitted = DateTime()
847
def get_verify_url(self, user):
848
"""Get the URL for verifying this submission, within the account of
850
# If this is a solo project, then self.path will be prefixed with the
851
# subject name. Remove the first path segment.
852
submitpath = self.path[1:] if self.path[:1] == '/' else self.path
853
if not self.assessed.is_group:
854
if '/' in submitpath:
855
submitpath = submitpath.split('/', 1)[1]
858
return "/files/%s/%s/%s?r=%d" % (user.login,
859
self.assessed.checkout_location, submitpath, self.revision)
862
def test_and_normalise_path(path):
863
"""Test that path is valid, and normalise it. This prevents possible
864
injections using malicious paths.
865
Returns the updated path, if successful.
866
Raises SubmissionError if invalid.
868
# Ensure the path is absolute to prevent being tacked onto working
870
# Prevent '\n' because it will break all sorts of things.
871
# Prevent '[' and ']' because they can be used to inject into the
873
# Normalise to avoid resulting in ".." path segments.
874
if not os.path.isabs(path):
875
raise SubmissionError("Path is not absolute")
876
if any(c in path for c in "\n[]"):
877
raise SubmissionError("Path must not contain '\\n', '[' or ']'")
878
return os.path.normpath(path)
880
# WORKSHEETS AND EXERCISES #
882
class Exercise(Storm):
883
"""An exercise for students to complete in a worksheet.
885
An exercise may be present in any number of worksheets.
888
__storm_table__ = "exercise"
889
id = Unicode(primary=True, name="identifier")
891
description = Unicode()
897
worksheet_exercises = ReferenceSet(id,
898
'WorksheetExercise.exercise_id')
900
worksheets = ReferenceSet(id,
901
'WorksheetExercise.exercise_id',
902
'WorksheetExercise.worksheet_id',
906
test_suites = ReferenceSet(id,
907
'TestSuite.exercise_id',
910
__init__ = _kwarg_init
913
return "<%s %s>" % (type(self).__name__, self.name)
915
def get_permissions(self, user, config):
916
return self.global_permissions(user, config)
919
def global_permissions(user, config):
920
"""Gets the set of permissions this user has over *all* exercises.
921
This is used to determine who may view the exercises list, and create
929
elif u'lecturer' in set((e.role for e in user.active_enrolments)):
932
elif (config['policy']['tutors_can_edit_worksheets']
933
and u'tutor' in set((e.role for e in user.active_enrolments))):
934
# Site-specific policy on the role of tutors
940
def get_description(self):
941
"""Return the description interpreted as reStructuredText."""
942
return rst(self.description)
945
"""Deletes the exercise, providing it has no associated worksheets."""
946
if (self.worksheet_exercises.count() > 0):
947
raise IntegrityError()
948
for suite in self.test_suites:
950
Store.of(self).remove(self)
952
class Worksheet(Storm):
953
"""A worksheet with exercises for students to complete.
955
Worksheets are owned by offerings.
958
__storm_table__ = "worksheet"
960
id = Int(primary=True, name="worksheetid")
961
offering_id = Int(name="offeringid")
962
identifier = Unicode()
970
attempts = ReferenceSet(id, "ExerciseAttempt.worksheetid")
971
offering = Reference(offering_id, 'Offering.id')
973
all_worksheet_exercises = ReferenceSet(id,
974
'WorksheetExercise.worksheet_id')
976
# Use worksheet_exercises to get access to the *active* WorksheetExercise
977
# objects binding worksheets to exercises. This is required to access the
981
def worksheet_exercises(self):
982
return self.all_worksheet_exercises.find(active=True)
984
__init__ = _kwarg_init
987
return "<%s %s>" % (type(self).__name__, self.name)
989
def remove_all_exercises(self):
990
"""Remove all exercises from this worksheet.
992
This does not delete the exercises themselves. It just removes them
995
store = Store.of(self)
996
for ws_ex in self.all_worksheet_exercises:
997
if ws_ex.saves.count() > 0 or ws_ex.attempts.count() > 0:
998
raise IntegrityError()
999
store.find(WorksheetExercise,
1000
WorksheetExercise.worksheet == self).remove()
1002
def get_permissions(self, user, config):
1003
offering_perms = self.offering.get_permissions(user, config)
1007
# Anybody who can view an offering can view a published
1009
if 'view' in offering_perms and self.published:
1012
# Any worksheet editors can both view and edit.
1013
if 'edit_worksheets' in offering_perms:
1020
"""Returns the xml of this worksheet, converts from rst if required."""
1021
if self.format == u'rst':
1022
ws_xml = rst(self.data)
1028
"""Deletes the worksheet, provided it has no attempts on any exercises.
1030
Returns True if delete succeeded, or False if this worksheet has
1031
attempts attached."""
1032
for ws_ex in self.all_worksheet_exercises:
1033
if ws_ex.saves.count() > 0 or ws_ex.attempts.count() > 0:
1034
raise IntegrityError()
1036
self.remove_all_exercises()
1037
Store.of(self).remove(self)
1039
class WorksheetExercise(Storm):
1040
"""A link between a worksheet and one of its exercises.
1042
These may be marked optional, in which case the exercise does not count
1043
for marking purposes. The sequence number is used to order the worksheet
1047
__storm_table__ = "worksheet_exercise"
1049
id = Int(primary=True, name="ws_ex_id")
1051
worksheet_id = Int(name="worksheetid")
1052
worksheet = Reference(worksheet_id, Worksheet.id)
1053
exercise_id = Unicode(name="exerciseid")
1054
exercise = Reference(exercise_id, Exercise.id)
1059
saves = ReferenceSet(id, "ExerciseSave.ws_ex_id")
1060
attempts = ReferenceSet(id, "ExerciseAttempt.ws_ex_id")
1062
__init__ = _kwarg_init
1065
return "<%s %s in %s>" % (type(self).__name__, self.exercise.name,
1066
self.worksheet.identifier)
1068
def get_permissions(self, user, config):
1069
return self.worksheet.get_permissions(user, config)
1072
class ExerciseSave(Storm):
1073
"""A potential exercise solution submitted by a user for storage.
1075
This is not an actual tested attempt at an exercise, it's just a save of
1076
the editing session.
1079
__storm_table__ = "exercise_save"
1080
__storm_primary__ = "ws_ex_id", "user_id"
1082
ws_ex_id = Int(name="ws_ex_id")
1083
worksheet_exercise = Reference(ws_ex_id, "WorksheetExercise.id")
1085
user_id = Int(name="loginid")
1086
user = Reference(user_id, User.id)
1090
__init__ = _kwarg_init
1093
return "<%s %s by %s at %s>" % (type(self).__name__,
1094
self.worksheet_exercise.exercise.name, self.user.login,
1095
self.date.strftime("%c"))
1097
class ExerciseAttempt(ExerciseSave):
1098
"""An attempt at solving an exercise.
1100
This is a special case of ExerciseSave, used when the user submits a
1101
candidate solution. Like an ExerciseSave, it constitutes exercise solution
1104
In addition, it contains information about the result of the submission:
1106
- complete - True if this submission was successful, rendering this
1107
exercise complete for this user in this worksheet.
1108
- active - True if this submission is "active" (usually true).
1109
Submissions may be de-activated by privileged users for
1110
special reasons, and then they won't count (either as a
1111
penalty or success), but will still be stored.
1114
__storm_table__ = "exercise_attempt"
1115
__storm_primary__ = "ws_ex_id", "user_id", "date"
1117
# The "text" field is the same but has a different name in the DB table
1119
text = Unicode(name="attempt")
1123
def get_permissions(self, user, config):
1124
return set(['view']) if user is self.user else set()
1126
class TestSuite(Storm):
1127
"""A container to group an exercise's test cases.
1129
The test suite contains some information on how to test. The function to
1130
test, variables to set and stdin data are stored here.
1133
__storm_table__ = "test_suite"
1134
__storm_primary__ = "exercise_id", "suiteid"
1137
exercise_id = Unicode(name="exerciseid")
1138
description = Unicode()
1140
function = Unicode()
1142
exercise = Reference(exercise_id, Exercise.id)
1143
test_cases = ReferenceSet(suiteid, 'TestCase.suiteid', order_by="seq_no")
1144
variables = ReferenceSet(suiteid, 'TestSuiteVar.suiteid', order_by='arg_no')
1147
"""Delete this suite, without asking questions."""
1148
for variable in self.variables:
1150
for test_case in self.test_cases:
1152
Store.of(self).remove(self)
1154
class TestCase(Storm):
1155
"""A container for actual tests (see TestCasePart), inside a test suite.
1157
It is the lowest level shown to students on their pass/fail status."""
1159
__storm_table__ = "test_case"
1160
__storm_primary__ = "testid", "suiteid"
1164
suite = Reference(suiteid, "TestSuite.suiteid")
1167
test_default = Unicode() # Currently unused - only used for file matching.
1170
parts = ReferenceSet(testid, "TestCasePart.testid")
1172
__init__ = _kwarg_init
1175
for part in self.parts:
1177
Store.of(self).remove(self)
1179
class TestSuiteVar(Storm):
1180
"""A variable used by an exercise test suite.
1182
This may represent a function argument or a normal variable.
1185
__storm_table__ = "suite_variable"
1186
__storm_primary__ = "varid"
1190
var_name = Unicode()
1191
var_value = Unicode()
1192
var_type = Unicode()
1195
suite = Reference(suiteid, "TestSuite.suiteid")
1197
__init__ = _kwarg_init
1200
Store.of(self).remove(self)
1202
class TestCasePart(Storm):
1203
"""An actual piece of code to test an exercise solution."""
1205
__storm_table__ = "test_case_part"
1206
__storm_primary__ = "partid"
1211
part_type = Unicode()
1212
test_type = Unicode()
1214
filename = Unicode()
1216
test = Reference(testid, "TestCase.testid")
1218
__init__ = _kwarg_init
1221
Store.of(self).remove(self)
added
removed
ivle/database.py
