18
18
# Author: Matt Giuca, Will Grant
20
"""Database utilities and content classes.
21
Database Classes and Utilities for Storm ORM
22
23
This module provides all of the classes which map to database tables.
23
24
It also provides miscellaneous utility functions for database interaction.
30
30
from storm.locals import create_database, Store, Int, Unicode, DateTime, \
31
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
36
__all__ = ['get_store',
39
38
'Subject', 'Semester', 'Offering', 'Enrolment',
40
39
'ProjectSet', 'Project', 'ProjectGroup', 'ProjectGroupMembership',
41
'Assessed', 'ProjectSubmission', 'ProjectExtension',
42
40
'Exercise', 'Worksheet', 'WorksheetExercise',
43
41
'ExerciseSave', 'ExerciseAttempt',
44
'TestCase', 'TestSuite', 'TestSuiteVar'
42
'AlreadyEnrolledError'
47
45
def _kwarg_init(self, **kwargs):
51
49
% (self.__class__.__name__, k))
52
50
setattr(self, k, v)
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)))
52
def get_conn_string():
54
Returns the Storm connection string, generated from the conf file.
56
return "postgres://%s:%s@%s:%d/%s" % (ivle.conf.db_user,
57
ivle.conf.db_password, ivle.conf.db_host, ivle.conf.db_port,
62
Open a database connection and transaction. Return a storm.store.Store
63
instance connected to the configured IVLE database.
65
return Store(create_database(get_conn_string()))
84
"""An IVLE user account."""
71
Represents an IVLE user.
85
73
__storm_table__ = "login"
87
75
id = Int(primary=True, name="loginid")
89
77
passhash = Unicode()
94
82
pass_exp = DateTime()
198
184
'''A sanely ordered list of all of the user's enrolments.'''
199
185
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
188
def hash_password(password):
224
"""Hash a password with MD5."""
225
return hashlib.md5(password).hexdigest()
189
return md5.md5(password).hexdigest()
228
192
def get_by_login(cls, store, login):
229
"""Find a user in a store by login name."""
194
Get the User from the db associated with a given store and
230
197
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
199
# SUBJECTS AND ENROLMENTS #
245
201
class Subject(Storm):
246
"""A subject (or course) which is run in some semesters."""
248
202
__storm_table__ = "subject"
250
204
id = Int(primary=True, name="subjectid")
251
205
code = Unicode(name="subj_code")
252
206
name = Unicode(name="subj_name")
253
207
short_name = Unicode(name="subj_short_name")
255
210
offerings = ReferenceSet(id, 'Offering.subject_id')
259
214
def __repr__(self):
260
215
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
217
class Semester(Storm):
296
"""A semester in which subjects can be run."""
298
218
__storm_table__ = "semester"
300
220
id = Int(primary=True, name="semesterid")
302
222
semester = Unicode()
305
225
offerings = ReferenceSet(id, 'Offering.semester_id')
306
enrolments = ReferenceSet(id,
307
'Offering.semester_id',
309
'Enrolment.offering_id')
311
227
__init__ = _kwarg_init
349
252
return "<%s %r in %r>" % (type(self).__name__, self.subject,
352
def enrol(self, user, role=u'student'):
353
"""Enrol a user in this offering.
355
Enrolments handle both the staff and student cases. The role controls
356
the privileges granted by this enrolment.
358
enrolment = Store.of(self).find(Enrolment,
359
Enrolment.user_id == user.id,
360
Enrolment.offering_id == self.id).one()
362
if enrolment is None:
363
enrolment = Enrolment(user=user, offering=self)
364
self.enrolments.add(enrolment)
366
enrolment.active = True
367
enrolment.role = role
369
def unenrol(self, user):
370
'''Unenrol a user from this offering.'''
371
enrolment = Store.of(self).find(Enrolment,
372
Enrolment.user_id == user.id,
373
Enrolment.offering_id == self.id).one()
374
Store.of(enrolment).remove(enrolment)
376
def get_permissions(self, user, config):
379
enrolment = self.get_enrolment(user)
380
if enrolment or user.admin:
382
if enrolment and enrolment.role == u'tutor':
383
perms.add('view_project_submissions')
384
# Site-specific policy on the role of tutors
385
if config['policy']['tutors_can_enrol_students']:
387
perms.add('enrol_student')
388
if config['policy']['tutors_can_edit_worksheets']:
389
perms.add('edit_worksheets')
390
if config['policy']['tutors_can_admin_groups']:
391
perms.add('admin_groups')
392
if (enrolment and enrolment.role in (u'lecturer')) or user.admin:
393
perms.add('view_project_submissions')
394
perms.add('admin_groups')
395
perms.add('edit_worksheets')
396
perms.add('edit') # Can edit projects & details
397
perms.add('enrol') # Can see enrolment screen at all
398
perms.add('enrol_student') # Can enrol students
399
perms.add('enrol_tutor') # Can enrol tutors
401
perms.add('enrol_lecturer') # Can enrol lecturers
404
def get_enrolment(self, user):
405
"""Find the user's enrolment in this offering."""
407
enrolment = self.enrolments.find(user=user).one()
413
def get_members_by_role(self, role):
414
return Store.of(self).find(User,
415
Enrolment.user_id == User.id,
416
Enrolment.offering_id == self.id,
417
Enrolment.role == role
418
).order_by(User.login)
422
return self.get_members_by_role(u'student')
424
def get_open_projects_for_user(self, user):
425
"""Find all projects currently open to submissions by a user."""
426
# XXX: Respect extensions.
427
return self.projects.find(Project.deadline > datetime.datetime.now())
429
def clone_worksheets(self, source):
430
"""Clone all worksheets from the specified source to this offering."""
431
import ivle.worksheet.utils
432
for worksheet in source.worksheets:
434
newws.seq_no = worksheet.seq_no
435
newws.identifier = worksheet.identifier
436
newws.name = worksheet.name
437
newws.assessable = worksheet.assessable
438
newws.data = worksheet.data
439
newws.format = worksheet.format
440
newws.offering = self
441
Store.of(self).add(newws)
442
ivle.worksheet.utils.update_exerciselist(newws)
255
def enrol(self, user):
256
'''Enrol a user in this offering.'''
257
# We'll get a horrible database constraint violation error if we try
258
# to add a second enrolment.
259
if Store.of(self).find(Enrolment,
260
Enrolment.user_id == user.id,
261
Enrolment.offering_id == self.id).count() == 1:
262
raise AlreadyEnrolledError()
264
e = Enrolment(user=user, offering=self, active=True)
265
self.enrolments.add(e)
445
267
class Enrolment(Storm):
446
"""An enrolment of a user in an offering.
448
This represents the roles of both staff and students.
451
268
__storm_table__ = "enrolment"
452
269
__storm_primary__ = "user_id", "offering_id"
511
311
return "<%s %d in %r>" % (type(self).__name__, self.id,
514
def get_permissions(self, user, config):
515
return self.offering.get_permissions(user, config)
517
def get_groups_for_user(self, user):
518
"""List all groups in this offering of which the user is a member."""
520
return Store.of(self).find(
522
ProjectGroupMembership.user_id == user.id,
523
ProjectGroupMembership.project_group_id == ProjectGroup.id,
524
ProjectGroup.project_set_id == self.id)
526
def get_submission_principal(self, user):
527
"""Get the principal on behalf of which the user can submit.
529
If this is a solo project set, the given user is returned. If
530
the user is a member of exactly one group, all the group is
531
returned. Otherwise, None is returned.
534
groups = self.get_groups_for_user(user)
535
if groups.count() == 1:
544
return self.max_students_per_group is not None
548
"""Get the entities (groups or users) assigned to submit this project.
550
This will be a Storm ResultSet.
552
#If its a solo project, return everyone in offering
554
return self.project_groups
556
return self.offering.students
558
class DeadlinePassed(Exception):
559
"""An exception indicating that a project cannot be submitted because the
560
deadline has passed."""
564
return "The project deadline has passed"
566
314
class Project(Storm):
567
"""A student project for which submissions can be made."""
569
315
__storm_table__ = "project"
571
317
id = Int(name="projectid", primary=True)
573
short_name = Unicode()
574
318
synopsis = Unicode()
576
320
project_set_id = Int(name="projectsetid")
577
321
project_set = Reference(project_set_id, ProjectSet.id)
578
322
deadline = DateTime()
580
assesseds = ReferenceSet(id, 'Assessed.project_id')
581
submissions = ReferenceSet(id,
582
'Assessed.project_id',
584
'ProjectSubmission.assessed_id')
586
324
__init__ = _kwarg_init
588
326
def __repr__(self):
589
return "<%s '%s' in %r>" % (type(self).__name__, self.short_name,
327
return "<%s '%s' in %r>" % (type(self).__name__, self.synopsis,
590
328
self.project_set.offering)
592
def can_submit(self, principal, user):
593
return (self in principal.get_projects() and
594
not self.has_deadline_passed(user))
596
def submit(self, principal, path, revision, who):
597
"""Submit a Subversion path and revision to a project.
599
@param principal: The owner of the Subversion repository, and the
600
entity on behalf of whom the submission is being made
601
@param path: A path within that repository to submit.
602
@param revision: The revision of that path to submit.
603
@param who: The user who is actually making the submission.
606
if not self.can_submit(principal, who):
607
raise DeadlinePassed()
609
a = Assessed.get(Store.of(self), principal, self)
610
ps = ProjectSubmission()
611
# Raise SubmissionError if the path is illegal
612
ps.path = ProjectSubmission.test_and_normalise_path(path)
613
ps.revision = revision
614
ps.date_submitted = datetime.datetime.now()
620
def get_permissions(self, user, config):
621
return self.project_set.offering.get_permissions(user, config)
624
def latest_submissions(self):
625
"""Return the latest submission for each Assessed."""
626
return Store.of(self).find(ProjectSubmission,
627
Assessed.project_id == self.id,
628
ProjectSubmission.assessed_id == Assessed.id,
629
ProjectSubmission.date_submitted == Select(
630
Max(ProjectSubmission.date_submitted),
631
ProjectSubmission.assessed_id == Assessed.id,
632
tables=ProjectSubmission
636
def has_deadline_passed(self, user):
637
"""Check whether the deadline has passed."""
638
# XXX: Need to respect extensions.
639
return self.deadline < datetime.datetime.now()
641
def get_submissions_for_principal(self, principal):
642
"""Fetch a ResultSet of all submissions by a particular principal."""
643
assessed = Assessed.get(Store.of(self), principal, self)
646
return assessed.submissions
650
330
class ProjectGroup(Storm):
651
"""A group of students working together on a project."""
653
331
__storm_table__ = "project_group"
655
333
id = Int(name="groupid", primary=True)
672
350
return "<%s %s in %r>" % (type(self).__name__, self.name,
673
351
self.project_set.offering)
676
def display_name(self):
677
"""Returns the "nice name" of the user or group."""
681
def short_name(self):
682
"""Returns the database "identifier" name of the user or group."""
685
def get_projects(self, offering=None, active_only=True):
686
'''Find projects that the group can submit.
688
This will include projects in the project set which owns this group,
689
unless the project set disallows groups (in which case none will be
692
@param active_only: Whether to only search active offerings.
693
@param offering: An optional offering to restrict the search to.
695
return Store.of(self).find(Project,
696
Project.project_set_id == ProjectSet.id,
697
ProjectSet.id == self.project_set.id,
698
ProjectSet.max_students_per_group != None,
699
ProjectSet.offering_id == Offering.id,
700
(offering is None) or (Offering.id == offering.id),
701
Semester.id == Offering.semester_id,
702
(not active_only) or (Semester.state == u'current'))
705
def get_permissions(self, user, config):
706
if user.admin or user in self.members:
707
return set(['submit_project'])
711
353
class ProjectGroupMembership(Storm):
712
"""A student's membership in a project group."""
714
354
__storm_table__ = "group_member"
715
355
__storm_primary__ = "user_id", "project_group_id"
725
365
return "<%s %r in %r>" % (type(self).__name__, self.user,
726
366
self.project_group)
728
class Assessed(Storm):
729
"""A composite of a user or group combined with a project.
731
Each project submission and extension refers to an Assessed. It is the
732
sole specifier of the repository and project.
735
__storm_table__ = "assessed"
737
id = Int(name="assessedid", primary=True)
738
user_id = Int(name="loginid")
739
user = Reference(user_id, User.id)
740
project_group_id = Int(name="groupid")
741
project_group = Reference(project_group_id, ProjectGroup.id)
743
project_id = Int(name="projectid")
744
project = Reference(project_id, Project.id)
746
extensions = ReferenceSet(id, 'ProjectExtension.assessed_id')
747
submissions = ReferenceSet(
748
id, 'ProjectSubmission.assessed_id', order_by='date_submitted')
751
return "<%s %r in %r>" % (type(self).__name__,
752
self.user or self.project_group, self.project)
756
"""True if the Assessed is a group, False if it is a user."""
757
return self.project_group is not None
761
return self.project_group or self.user
764
def checkout_location(self):
765
"""Returns the location of the Subversion workspace for this piece of
766
assessment, relative to each group member's home directory."""
767
subjectname = self.project.project_set.offering.subject.short_name
769
checkout_dir_name = self.principal.short_name
771
checkout_dir_name = "mywork"
772
return subjectname + "/" + checkout_dir_name
775
def get(cls, store, principal, project):
776
"""Find or create an Assessed for the given user or group and project.
778
@param principal: The user or group.
779
@param project: The project.
782
if t not in (User, ProjectGroup):
783
raise AssertionError('principal must be User or ProjectGroup')
786
(t is User) or (cls.project_group_id == principal.id),
787
(t is ProjectGroup) or (cls.user_id == principal.id),
788
cls.project_id == project.id).one()
795
a.project_group = principal
802
class ProjectExtension(Storm):
803
"""An extension granted to a user or group on a particular project.
805
The user or group and project are specified by the Assessed.
808
__storm_table__ = "project_extension"
810
id = Int(name="extensionid", primary=True)
811
assessed_id = Int(name="assessedid")
812
assessed = Reference(assessed_id, Assessed.id)
813
deadline = DateTime()
814
approver_id = Int(name="approver")
815
approver = Reference(approver_id, User.id)
818
class SubmissionError(Exception):
819
"""Denotes a validation error during submission."""
822
class ProjectSubmission(Storm):
823
"""A submission from a user or group repository to a particular project.
825
The content of a submission is a single path and revision inside a
826
repository. The repository is that owned by the submission's user and
827
group, while the path and revision are explicit.
829
The user or group and project are specified by the Assessed.
832
__storm_table__ = "project_submission"
834
id = Int(name="submissionid", primary=True)
835
assessed_id = Int(name="assessedid")
836
assessed = Reference(assessed_id, Assessed.id)
839
submitter_id = Int(name="submitter")
840
submitter = Reference(submitter_id, User.id)
841
date_submitted = DateTime()
843
def get_verify_url(self, user):
844
"""Get the URL for verifying this submission, within the account of
846
# If this is a solo project, then self.path will be prefixed with the
847
# subject name. Remove the first path segment.
848
submitpath = self.path[1:] if self.path[:1] == '/' else self.path
849
if not self.assessed.is_group:
850
if '/' in submitpath:
851
submitpath = submitpath.split('/', 1)[1]
854
return "/files/%s/%s/%s?r=%d" % (user.login,
855
self.assessed.checkout_location, submitpath, self.revision)
858
def test_and_normalise_path(path):
859
"""Test that path is valid, and normalise it. This prevents possible
860
injections using malicious paths.
861
Returns the updated path, if successful.
862
Raises SubmissionError if invalid.
864
# Ensure the path is absolute to prevent being tacked onto working
866
# Prevent '\n' because it will break all sorts of things.
867
# Prevent '[' and ']' because they can be used to inject into the
869
# Normalise to avoid resulting in ".." path segments.
870
if not os.path.isabs(path):
871
raise SubmissionError("Path is not absolute")
872
if any(c in path for c in "\n[]"):
873
raise SubmissionError("Path must not contain '\\n', '[' or ']'")
874
return os.path.normpath(path)
876
368
# WORKSHEETS AND EXERCISES #
878
370
class Exercise(Storm):
879
"""An exercise for students to complete in a worksheet.
881
An exercise may be present in any number of worksheets.
884
__storm_table__ = "exercise"
885
id = Unicode(primary=True, name="identifier")
887
description = Unicode()
893
worksheet_exercises = ReferenceSet(id,
894
'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")
896
379
worksheets = ReferenceSet(id,
897
380
'WorksheetExercise.exercise_id',
902
test_suites = ReferenceSet(id,
903
'TestSuite.exercise_id',
906
385
__init__ = _kwarg_init
908
387
def __repr__(self):
909
388
return "<%s %s>" % (type(self).__name__, self.name)
911
def get_permissions(self, user, config):
912
return self.global_permissions(user, config)
915
def global_permissions(user, config):
916
"""Gets the set of permissions this user has over *all* exercises.
917
This is used to determine who may view the exercises list, and create
925
elif u'lecturer' in set((e.role for e in user.active_enrolments)):
928
elif (config['policy']['tutors_can_edit_worksheets']
929
and u'tutor' in set((e.role for e in user.active_enrolments))):
930
# Site-specific policy on the role of tutors
936
def get_description(self):
937
"""Return the description interpreted as reStructuredText."""
938
return rst(self.description)
941
"""Deletes the exercise, providing it has no associated worksheets."""
942
if (self.worksheet_exercises.count() > 0):
943
raise IntegrityError()
944
for suite in self.test_suites:
946
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))
948
405
class Worksheet(Storm):
949
"""A worksheet with exercises for students to complete.
951
Worksheets are owned by offerings.
954
406
__storm_table__ = "worksheet"
956
408
id = Int(primary=True, name="worksheetid")
957
offering_id = Int(name="offeringid")
958
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")
960
413
assessable = Bool()
965
attempts = ReferenceSet(id, "ExerciseAttempt.worksheetid")
966
offering = Reference(offering_id, 'Offering.id')
968
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,
969
424
'WorksheetExercise.worksheet_id')
971
# Use worksheet_exercises to get access to the *active* WorksheetExercise
972
# objects binding worksheets to exercises. This is required to access the
976
def worksheet_exercises(self):
977
return self.all_worksheet_exercises.find(active=True)
979
426
__init__ = _kwarg_init
981
428
def __repr__(self):
982
429
return "<%s %s>" % (type(self).__name__, self.name)
984
def remove_all_exercises(self):
985
"""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.
987
446
This does not delete the exercises themselves. It just removes them
988
447
from the worksheet.
990
store = Store.of(self)
991
for ws_ex in self.all_worksheet_exercises:
992
if ws_ex.saves.count() > 0 or ws_ex.attempts.count() > 0:
993
raise IntegrityError()
994
449
store.find(WorksheetExercise,
995
450
WorksheetExercise.worksheet == self).remove()
997
def get_permissions(self, user, config):
998
# Almost the same permissions as for the offering itself
999
perms = self.offering.get_permissions(user, config)
1000
# However, "edit" permission is derived from the "edit_worksheets"
1001
# permission of the offering
1002
if 'edit_worksheets' in perms:
1005
perms.discard('edit')
1009
"""Returns the xml of this worksheet, converts from rst if required."""
1010
if self.format == u'rst':
1011
ws_xml = rst(self.data)
1017
"""Deletes the worksheet, provided it has no attempts on any exercises.
1019
Returns True if delete succeeded, or False if this worksheet has
1020
attempts attached."""
1021
for ws_ex in self.all_worksheet_exercises:
1022
if ws_ex.saves.count() > 0 or ws_ex.attempts.count() > 0:
1023
raise IntegrityError()
1025
self.remove_all_exercises()
1026
Store.of(self).remove(self)
1028
452
class WorksheetExercise(Storm):
1029
"""A link between a worksheet and one of its exercises.
1031
These may be marked optional, in which case the exercise does not count
1032
for marking purposes. The sequence number is used to order the worksheet
1036
__storm_table__ = "worksheet_exercise"
1038
id = Int(primary=True, name="ws_ex_id")
453
__storm_table__ = "worksheet_problem"
454
__storm_primary__ = "worksheet_id", "exercise_id"
1040
456
worksheet_id = Int(name="worksheetid")
1041
457
worksheet = Reference(worksheet_id, Worksheet.id)
1042
exercise_id = Unicode(name="exerciseid")
458
exercise_id = Int(name="problemid")
1043
459
exercise = Reference(exercise_id, Exercise.id)
1044
460
optional = Bool()
1048
saves = ReferenceSet(id, "ExerciseSave.ws_ex_id")
1049
attempts = ReferenceSet(id, "ExerciseAttempt.ws_ex_id")
1051
462
__init__ = _kwarg_init
1053
464
def __repr__(self):
1054
465
return "<%s %s in %s>" % (type(self).__name__, self.exercise.name,
1055
self.worksheet.identifier)
1057
def get_permissions(self, user, config):
1058
return self.worksheet.get_permissions(user, config)
1061
468
class ExerciseSave(Storm):
1062
"""A potential exercise solution submitted by a user for storage.
1064
This is not an actual tested attempt at an exercise, it's just a save of
1065
the editing session.
1068
__storm_table__ = "exercise_save"
1069
__storm_primary__ = "ws_ex_id", "user_id"
1071
ws_ex_id = Int(name="ws_ex_id")
1072
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)
1074
482
user_id = Int(name="loginid")
1075
483
user = Reference(user_id, User.id)
1076
484
date = DateTime()
1083
491
self.exercise.name, self.user.login, self.date.strftime("%c"))
1085
493
class ExerciseAttempt(ExerciseSave):
1086
"""An attempt at solving an exercise.
1088
This is a special case of ExerciseSave, used when the user submits a
1089
candidate solution. Like an ExerciseSave, it constitutes exercise solution
1092
In addition, it contains information about the result of the submission:
1094
- complete - True if this submission was successful, rendering this
1095
exercise complete for this user in this worksheet.
1096
- active - True if this submission is "active" (usually true).
1097
Submissions may be de-activated by privileged users for
1098
special reasons, and then they won't count (either as a
1099
penalty or success), but will still be stored.
1102
__storm_table__ = "exercise_attempt"
1103
__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"
1105
509
# The "text" field is the same but has a different name in the DB table
1106
510
# for some reason.
1107
511
text = Unicode(name="attempt")
1108
512
complete = Bool()
1111
def get_permissions(self, user, config):
1112
return set(['view']) if user is self.user else set()
1114
class TestSuite(Storm):
1115
"""A container to group an exercise's test cases.
1117
The test suite contains some information on how to test. The function to
1118
test, variables to set and stdin data are stored here.
1121
__storm_table__ = "test_suite"
1122
__storm_primary__ = "exercise_id", "suiteid"
1125
exercise_id = Unicode(name="exerciseid")
1126
description = Unicode()
1128
function = Unicode()
1130
exercise = Reference(exercise_id, Exercise.id)
1131
test_cases = ReferenceSet(suiteid, 'TestCase.suiteid', order_by="seq_no")
1132
variables = ReferenceSet(suiteid, 'TestSuiteVar.suiteid', order_by='arg_no')
1135
"""Delete this suite, without asking questions."""
1136
for variable in self.variables:
1138
for test_case in self.test_cases:
1140
Store.of(self).remove(self)
1142
class TestCase(Storm):
1143
"""A container for actual tests (see TestCasePart), inside a test suite.
1145
It is the lowest level shown to students on their pass/fail status."""
1147
__storm_table__ = "test_case"
1148
__storm_primary__ = "testid", "suiteid"
1152
suite = Reference(suiteid, "TestSuite.suiteid")
1155
test_default = Unicode() # Currently unused - only used for file matching.
1158
parts = ReferenceSet(testid, "TestCasePart.testid")
1160
__init__ = _kwarg_init
1163
for part in self.parts:
1165
Store.of(self).remove(self)
1167
class TestSuiteVar(Storm):
1168
"""A variable used by an exercise test suite.
1170
This may represent a function argument or a normal variable.
1173
__storm_table__ = "suite_variable"
1174
__storm_primary__ = "varid"
1178
var_name = Unicode()
1179
var_value = Unicode()
1180
var_type = Unicode()
1183
suite = Reference(suiteid, "TestSuite.suiteid")
1185
__init__ = _kwarg_init
1188
Store.of(self).remove(self)
1190
class TestCasePart(Storm):
1191
"""An actual piece of code to test an exercise solution."""
1193
__storm_table__ = "test_case_part"
1194
__storm_primary__ = "partid"
1199
part_type = Unicode()
1200
test_type = Unicode()
1202
filename = Unicode()
1204
test = Reference(testid, "TestCase.testid")
1206
__init__ = _kwarg_init
1209
Store.of(self).remove(self)
added
removed
ivle/database.py
