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.
32
30
from storm.locals import create_database, Store, Int, Unicode, DateTime, \
33
31
Reference, ReferenceSet, Bool, Storm, Desc
34
from storm.expr import Select, Max
35
from storm.exceptions import NotOneError, IntegrityError
37
from ivle.worksheet.rst import rst
39
36
__all__ = ['get_store',
41
38
'Subject', 'Semester', 'Offering', 'Enrolment',
42
39
'ProjectSet', 'Project', 'ProjectGroup', 'ProjectGroupMembership',
43
'Assessed', 'ProjectSubmission', 'ProjectExtension',
44
40
'Exercise', 'Worksheet', 'WorksheetExercise',
45
'ExerciseSave', 'ExerciseAttempt',
46
'TestCase', 'TestSuite', 'TestSuiteVar'
41
'ExerciseSave', 'ExerciseAttempt'
49
44
def _kwarg_init(self, **kwargs):
200
176
'''A sanely ordered list of all of the user's enrolments.'''
201
177
return self._get_enrolments(False)
203
def get_projects(self, offering=None, active_only=True):
204
"""Find projects that the user can submit.
206
This will include projects for offerings in which the user is
207
enrolled, as long as the project is not in a project set which has
208
groups (ie. if maximum number of group members is 0).
210
@param active_only: Whether to only search active offerings.
211
@param offering: An optional offering to restrict the search to.
213
return Store.of(self).find(Project,
214
Project.project_set_id == ProjectSet.id,
215
ProjectSet.max_students_per_group == None,
216
ProjectSet.offering_id == Offering.id,
217
(offering is None) or (Offering.id == offering.id),
218
Semester.id == Offering.semester_id,
219
(not active_only) or (Semester.state == u'current'),
220
Enrolment.offering_id == Offering.id,
221
Enrolment.user_id == self.id,
222
Enrolment.active == True)
225
180
def hash_password(password):
226
"""Hash a password with MD5."""
227
return hashlib.md5(password).hexdigest()
181
return md5.md5(password).hexdigest()
230
184
def get_by_login(cls, store, login):
231
"""Find a user in a store by login name."""
186
Get the User from the db associated with a given store and
232
189
return store.find(cls, cls.login == unicode(login)).one()
234
def get_svn_url(self, config):
235
"""Get the subversion repository URL for this user or group."""
236
url = config['urls']['svn_addr']
237
path = 'users/%s' % self.login
238
return urlparse.urljoin(url, path)
240
def get_permissions(self, user, config):
241
"""Determine privileges held by a user over this object.
243
If the user requesting privileges is this user or an admin,
244
they may do everything. Otherwise they may do nothing.
246
if user and user.admin or user is self:
247
return set(['view_public', 'view', 'edit', 'submit_project'])
249
return set(['view_public'])
251
191
# SUBJECTS AND ENROLMENTS #
253
193
class Subject(Storm):
254
"""A subject (or course) which is run in some semesters."""
256
194
__storm_table__ = "subject"
258
196
id = Int(primary=True, name="subjectid")
259
197
code = Unicode(name="subj_code")
260
198
name = Unicode(name="subj_name")
261
199
short_name = Unicode(name="subj_short_name")
263
202
offerings = ReferenceSet(id, 'Offering.subject_id')
267
206
def __repr__(self):
268
207
return "<%s '%s'>" % (type(self).__name__, self.short_name)
270
def get_permissions(self, user, config):
271
"""Determine privileges held by a user over this object.
273
If the user requesting privileges is an admin, they may edit.
274
Otherwise they may only read.
283
def active_offerings(self):
284
"""Find active offerings for this subject.
286
Return a sequence of currently active offerings for this subject
287
(offerings whose semester.state is "current"). There should be 0 or 1
288
elements in this sequence, but it's possible there are more.
290
return self.offerings.find(Offering.semester_id == Semester.id,
291
Semester.state == u'current')
293
def offering_for_semester(self, year, semester):
294
"""Get the offering for the given year/semester, or None.
296
@param year: A string representation of the year.
297
@param semester: A string representation of the semester.
299
return self.offerings.find(Offering.semester_id == Semester.id,
300
Semester.year == unicode(year),
301
Semester.url_name == unicode(semester)).one()
303
209
class Semester(Storm):
304
"""A semester in which subjects can be run."""
306
210
__storm_table__ = "semester"
308
212
id = Int(primary=True, name="semesterid")
312
display_name = Unicode()
315
217
offerings = ReferenceSet(id, 'Offering.semester_id')
316
enrolments = ReferenceSet(id,
317
'Offering.semester_id',
319
'Enrolment.offering_id')
321
219
__init__ = _kwarg_init
323
221
def __repr__(self):
324
return "<%s %s/%s>" % (type(self).__name__, self.year, self.code)
222
return "<%s %s/%s>" % (type(self).__name__, self.year, self.semester)
326
224
class Offering(Storm):
327
"""An offering of a subject in a particular semester."""
329
225
__storm_table__ = "offering"
331
227
id = Int(primary=True, name="offeringid")
361
239
return "<%s %r in %r>" % (type(self).__name__, self.subject,
364
def enrol(self, user, role=u'student'):
365
"""Enrol a user in this offering.
367
Enrolments handle both the staff and student cases. The role controls
368
the privileges granted by this enrolment.
370
enrolment = Store.of(self).find(Enrolment,
371
Enrolment.user_id == user.id,
372
Enrolment.offering_id == self.id).one()
374
if enrolment is None:
375
enrolment = Enrolment(user=user, offering=self)
376
self.enrolments.add(enrolment)
378
enrolment.active = True
379
enrolment.role = role
381
def unenrol(self, user):
382
'''Unenrol a user from this offering.'''
383
enrolment = Store.of(self).find(Enrolment,
384
Enrolment.user_id == user.id,
385
Enrolment.offering_id == self.id).one()
386
Store.of(enrolment).remove(enrolment)
388
def get_permissions(self, user, config):
391
enrolment = self.get_enrolment(user)
392
if enrolment or user.admin:
394
if enrolment and enrolment.role == u'tutor':
395
perms.add('view_project_submissions')
396
# Site-specific policy on the role of tutors
397
if config['policy']['tutors_can_enrol_students']:
399
perms.add('enrol_student')
400
if config['policy']['tutors_can_edit_worksheets']:
401
perms.add('edit_worksheets')
402
if config['policy']['tutors_can_admin_groups']:
403
perms.add('admin_groups')
404
if (enrolment and enrolment.role in (u'lecturer')) or user.admin:
405
perms.add('view_project_submissions')
406
perms.add('admin_groups')
407
perms.add('edit_worksheets')
408
perms.add('view_worksheet_marks')
409
perms.add('edit') # Can edit projects & details
410
perms.add('enrol') # Can see enrolment screen at all
411
perms.add('enrol_student') # Can enrol students
412
perms.add('enrol_tutor') # Can enrol tutors
414
perms.add('enrol_lecturer') # Can enrol lecturers
417
def get_enrolment(self, user):
418
"""Find the user's enrolment in this offering."""
420
enrolment = self.enrolments.find(user=user).one()
426
def get_members_by_role(self, role):
427
return Store.of(self).find(User,
428
Enrolment.user_id == User.id,
429
Enrolment.offering_id == self.id,
430
Enrolment.role == role
431
).order_by(User.login)
435
return self.get_members_by_role(u'student')
437
def get_open_projects_for_user(self, user):
438
"""Find all projects currently open to submissions by a user."""
439
# XXX: Respect extensions.
440
return self.projects.find(Project.deadline > datetime.datetime.now())
442
def has_worksheet_cutoff_passed(self, user):
443
"""Check whether the worksheet cutoff has passed.
444
A user is required, in case we support extensions.
446
if self.worksheet_cutoff is None:
449
return self.worksheet_cutoff < datetime.datetime.now()
451
def clone_worksheets(self, source):
452
"""Clone all worksheets from the specified source to this offering."""
453
import ivle.worksheet.utils
454
for worksheet in source.worksheets:
456
newws.seq_no = worksheet.seq_no
457
newws.identifier = worksheet.identifier
458
newws.name = worksheet.name
459
newws.assessable = worksheet.assessable
460
newws.published = worksheet.published
461
newws.data = worksheet.data
462
newws.format = worksheet.format
463
newws.offering = self
464
Store.of(self).add(newws)
465
ivle.worksheet.utils.update_exerciselist(newws)
468
242
class Enrolment(Storm):
469
"""An enrolment of a user in an offering.
471
This represents the roles of both staff and students.
474
243
__storm_table__ = "enrolment"
475
244
__storm_primary__ = "user_id", "offering_id"
525
266
offering = Reference(offering_id, Offering.id)
526
267
max_students_per_group = Int()
528
projects = ReferenceSet(id, 'Project.project_set_id')
529
project_groups = ReferenceSet(id, 'ProjectGroup.project_set_id')
531
269
__init__ = _kwarg_init
533
271
def __repr__(self):
534
272
return "<%s %d in %r>" % (type(self).__name__, self.id,
537
def get_permissions(self, user, config):
538
return self.offering.get_permissions(user, config)
540
def get_groups_for_user(self, user):
541
"""List all groups in this offering of which the user is a member."""
543
return Store.of(self).find(
545
ProjectGroupMembership.user_id == user.id,
546
ProjectGroupMembership.project_group_id == ProjectGroup.id,
547
ProjectGroup.project_set_id == self.id)
549
def get_submission_principal(self, user):
550
"""Get the principal on behalf of which the user can submit.
552
If this is a solo project set, the given user is returned. If
553
the user is a member of exactly one group, all the group is
554
returned. Otherwise, None is returned.
557
groups = self.get_groups_for_user(user)
558
if groups.count() == 1:
567
return self.max_students_per_group is not None
571
"""Get the entities (groups or users) assigned to submit this project.
573
This will be a Storm ResultSet.
575
#If its a solo project, return everyone in offering
577
return self.project_groups
579
return self.offering.students
581
class DeadlinePassed(Exception):
582
"""An exception indicating that a project cannot be submitted because the
583
deadline has passed."""
587
return "The project deadline has passed"
589
275
class Project(Storm):
590
"""A student project for which submissions can be made."""
592
276
__storm_table__ = "project"
594
278
id = Int(name="projectid", primary=True)
596
short_name = Unicode()
597
279
synopsis = Unicode()
599
281
project_set_id = Int(name="projectsetid")
600
282
project_set = Reference(project_set_id, ProjectSet.id)
601
283
deadline = DateTime()
603
assesseds = ReferenceSet(id, 'Assessed.project_id')
604
submissions = ReferenceSet(id,
605
'Assessed.project_id',
607
'ProjectSubmission.assessed_id')
609
285
__init__ = _kwarg_init
611
287
def __repr__(self):
612
return "<%s '%s' in %r>" % (type(self).__name__, self.short_name,
288
return "<%s '%s' in %r>" % (type(self).__name__, self.synopsis,
613
289
self.project_set.offering)
615
def can_submit(self, principal, user, late=False):
617
@param late: If True, does not take the deadline into account.
619
return (self in principal.get_projects() and
620
(late or not self.has_deadline_passed(user)))
622
def submit(self, principal, path, revision, who, late=False):
623
"""Submit a Subversion path and revision to a project.
625
@param principal: The owner of the Subversion repository, and the
626
entity on behalf of whom the submission is being made
627
@param path: A path within that repository to submit.
628
@param revision: The revision of that path to submit.
629
@param who: The user who is actually making the submission.
630
@param late: If True, will not raise a DeadlinePassed exception even
631
after the deadline. (Default False.)
634
if not self.can_submit(principal, who, late=late):
635
raise DeadlinePassed()
637
a = Assessed.get(Store.of(self), principal, self)
638
ps = ProjectSubmission()
639
# Raise SubmissionError if the path is illegal
640
ps.path = ProjectSubmission.test_and_normalise_path(path)
641
ps.revision = revision
642
ps.date_submitted = datetime.datetime.now()
648
def get_permissions(self, user, config):
649
return self.project_set.offering.get_permissions(user, config)
652
def latest_submissions(self):
653
"""Return the latest submission for each Assessed."""
654
return Store.of(self).find(ProjectSubmission,
655
Assessed.project_id == self.id,
656
ProjectSubmission.assessed_id == Assessed.id,
657
ProjectSubmission.date_submitted == Select(
658
Max(ProjectSubmission.date_submitted),
659
ProjectSubmission.assessed_id == Assessed.id,
660
tables=ProjectSubmission
664
def has_deadline_passed(self, user):
665
"""Check whether the deadline has passed."""
666
# XXX: Need to respect extensions.
667
return self.deadline < datetime.datetime.now()
669
def get_submissions_for_principal(self, principal):
670
"""Fetch a ResultSet of all submissions by a particular principal."""
671
assessed = Assessed.get(Store.of(self), principal, self)
674
return assessed.submissions
677
def can_delete(self):
678
"""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)
689
291
class ProjectGroup(Storm):
690
"""A group of students working together on a project."""
692
292
__storm_table__ = "project_group"
694
294
id = Int(name="groupid", primary=True)
712
307
self.project_set.offering)
715
def display_name(self):
716
"""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.
727
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.
734
return Store.of(self).find(Project,
735
Project.project_set_id == ProjectSet.id,
736
ProjectSet.id == self.project_set.id,
737
ProjectSet.max_students_per_group != None,
738
ProjectSet.offering_id == Offering.id,
739
(offering is None) or (Offering.id == offering.id),
740
Semester.id == Offering.semester_id,
741
(not active_only) or (Semester.state == u'current'))
743
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' % (
747
self.project_set.offering.subject.short_name,
748
self.project_set.offering.semester.year,
749
self.project_set.offering.semester.url_name,
752
return urlparse.urljoin(url, path)
754
def get_permissions(self, user, config):
755
if user.admin or user in self.members:
756
return set(['submit_project'])
311
return Store.of(self).find(User,
312
ProjectGroupMembership.project_group_id == self.id,
313
User.id == ProjectGroupMembership.user_id)
760
315
class ProjectGroupMembership(Storm):
761
"""A student's membership in a project group."""
763
316
__storm_table__ = "group_member"
764
317
__storm_primary__ = "user_id", "project_group_id"
774
327
return "<%s %r in %r>" % (type(self).__name__, self.user,
775
328
self.project_group)
777
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)
787
user_id = Int(name="loginid")
788
user = Reference(user_id, User.id)
789
project_group_id = Int(name="groupid")
790
project_group = Reference(project_group_id, ProjectGroup.id)
792
project_id = Int(name="projectid")
793
project = Reference(project_id, Project.id)
795
extensions = ReferenceSet(id, 'ProjectExtension.assessed_id')
796
submissions = ReferenceSet(
797
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)
805
"""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):
814
"""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"
821
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")
869
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
_, ext = os.path.splitext(svn_url)
932
username = (req.user.login if req.user.login.isalnum() else
933
"'%s'"%req.user.login)
934
# Export to a file or directory relative to the current directory,
935
# with the student's login name, appended with the submitted file's
937
export_path = self.assessed.principal.short_name + ext
938
return "svn export --username %s -r%d '%s' %s"%(req.user.login,
939
self.revision, svn_url, export_path)
942
def test_and_normalise_path(path):
943
"""Test that path is valid, and normalise it. This prevents possible
944
injections using malicious paths.
945
Returns the updated path, if successful.
946
Raises SubmissionError if invalid.
948
# Ensure the path is absolute to prevent being tacked onto working
950
# Prevent '\n' because it will break all sorts of things.
951
# Prevent '[' and ']' because they can be used to inject into the
953
# Normalise to avoid resulting in ".." path segments.
954
if not os.path.isabs(path):
955
raise SubmissionError("Path is not absolute")
956
if any(c in path for c in "\n[]"):
957
raise SubmissionError("Path must not contain '\\n', '[' or ']'")
958
return os.path.normpath(path)
962
"""True if the project was submitted late."""
963
return self.days_late > 0
967
"""The number of days the project was submitted late (rounded up), or
969
# XXX: Need to respect extensions.
971
(self.date_submitted - self.assessed.project.deadline).days + 1)
973
330
# WORKSHEETS AND EXERCISES #
975
332
class Exercise(Storm):
976
"""An exercise for students to complete in a worksheet.
978
An exercise may be present in any number of worksheets.
981
__storm_table__ = "exercise"
982
id = Unicode(primary=True, name="identifier")
984
description = Unicode()
985
_description_xhtml_cache = Unicode(name='description_xhtml_cache')
991
worksheet_exercises = ReferenceSet(id,
992
'WorksheetExercise.exercise_id')
333
# Note: Table "problem" is called "Exercise" in the Object layer, since
334
# it's called that everywhere else.
335
__storm_table__ = "problem"
337
id = Int(primary=True, name="problemid")
338
name = Unicode(name="identifier")
994
341
worksheets = ReferenceSet(id,
995
342
'WorksheetExercise.exercise_id',
1000
test_suites = ReferenceSet(id,
1001
'TestSuite.exercise_id',
1004
347
__init__ = _kwarg_init
1006
349
def __repr__(self):
1007
350
return "<%s %s>" % (type(self).__name__, self.name)
1009
def get_permissions(self, user, config):
1010
return self.global_permissions(user, config)
1013
def global_permissions(user, config):
1014
"""Gets the set of permissions this user has over *all* exercises.
1015
This is used to determine who may view the exercises list, and create
1019
if user is not None:
1023
elif u'lecturer' in set((e.role for e in user.active_enrolments)):
1026
elif (config['policy']['tutors_can_edit_worksheets']
1027
and u'tutor' in set((e.role for e in user.active_enrolments))):
1028
# Site-specific policy on the role of tutors
1034
def _cache_description_xhtml(self, invalidate=False):
1035
# Don't regenerate an existing cache unless forced.
1036
if self._description_xhtml_cache is not None and not invalidate:
1039
if self.description:
1040
self._description_xhtml_cache = rst(self.description)
1042
self._description_xhtml_cache = None
1045
def description_xhtml(self):
1046
"""The XHTML exercise description, converted from reStructuredText."""
1047
self._cache_description_xhtml()
1048
return self._description_xhtml_cache
1050
def set_description(self, description):
1051
self.description = description
1052
self._cache_description_xhtml(invalidate=True)
1055
"""Deletes the exercise, providing it has no associated worksheets."""
1056
if (self.worksheet_exercises.count() > 0):
1057
raise IntegrityError()
1058
for suite in self.test_suites:
1060
Store.of(self).remove(self)
353
def get_by_name(cls, store, name):
355
Get the Exercise from the db associated with a given store and name.
356
If the exercise is not in the database, creates it and inserts it
359
ex = store.find(cls, cls.name == unicode(name)).one()
362
ex = Exercise(name=unicode(name))
1062
367
class Worksheet(Storm):
1063
"""A worksheet with exercises for students to complete.
1065
Worksheets are owned by offerings.
1068
368
__storm_table__ = "worksheet"
1070
370
id = Int(primary=True, name="worksheetid")
1071
offering_id = Int(name="offeringid")
1072
identifier = Unicode()
371
# XXX subject is not linked to a Subject object. This is a property of
372
# the database, and will be refactored.
374
name = Unicode(name="identifier")
1074
375
assessable = Bool()
1077
_data_xhtml_cache = Unicode(name='data_xhtml_cache')
1081
attempts = ReferenceSet(id, "ExerciseAttempt.worksheetid")
1082
offering = Reference(offering_id, 'Offering.id')
1084
all_worksheet_exercises = ReferenceSet(id,
378
exercises = ReferenceSet(id,
379
'WorksheetExercise.worksheet_id',
380
'WorksheetExercise.exercise_id',
382
# Use worksheet_exercises to get access to the WorksheetExercise objects
383
# binding worksheets to exercises. This is required to access the
385
worksheet_exercises = ReferenceSet(id,
1085
386
'WorksheetExercise.worksheet_id')
1087
# Use worksheet_exercises to get access to the *active* WorksheetExercise
1088
# objects binding worksheets to exercises. This is required to access the
1092
def worksheet_exercises(self):
1093
return self.all_worksheet_exercises.find(active=True)
1095
388
__init__ = _kwarg_init
1097
390
def __repr__(self):
1098
391
return "<%s %s>" % (type(self).__name__, self.name)
1100
def remove_all_exercises(self):
1101
"""Remove all exercises from this worksheet.
393
# XXX Refactor this - make it an instance method of Subject rather than a
394
# class method of Worksheet. Can't do that now because Subject isn't
395
# linked referentially to the Worksheet.
397
def get_by_name(cls, store, subjectname, worksheetname):
399
Get the Worksheet from the db associated with a given store, subject
400
name and worksheet name.
402
return store.find(cls, cls.subject == unicode(subjectname),
403
cls.name == unicode(worksheetname)).one()
405
def remove_all_exercises(self, store):
407
Remove all exercises from this worksheet.
1103
408
This does not delete the exercises themselves. It just removes them
1104
409
from the worksheet.
1106
store = Store.of(self)
1107
for ws_ex in self.all_worksheet_exercises:
1108
if ws_ex.saves.count() > 0 or ws_ex.attempts.count() > 0:
1109
raise IntegrityError()
1110
411
store.find(WorksheetExercise,
1111
412
WorksheetExercise.worksheet == self).remove()
1113
def get_permissions(self, user, config):
1114
offering_perms = self.offering.get_permissions(user, config)
1118
# Anybody who can view an offering can view a published
1120
if 'view' in offering_perms and self.published:
1123
# Any worksheet editors can both view and edit.
1124
if 'edit_worksheets' in offering_perms:
1130
def _cache_data_xhtml(self, invalidate=False):
1131
# Don't regenerate an existing cache unless forced.
1132
if self._data_xhtml_cache is not None and not invalidate:
1135
if self.format == u'rst':
1136
self._data_xhtml_cache = rst(self.data)
1138
self._data_xhtml_cache = None
1141
def data_xhtml(self):
1142
"""The XHTML of this worksheet, converted from rST if required."""
1143
# Update the rST -> XHTML cache, if required.
1144
self._cache_data_xhtml()
1146
if self.format == u'rst':
1147
return self._data_xhtml_cache
1151
def set_data(self, data):
1153
self._cache_data_xhtml(invalidate=True)
1156
"""Deletes the worksheet, provided it has no attempts on any exercises.
1158
Returns True if delete succeeded, or False if this worksheet has
1159
attempts attached."""
1160
for ws_ex in self.all_worksheet_exercises:
1161
if ws_ex.saves.count() > 0 or ws_ex.attempts.count() > 0:
1162
raise IntegrityError()
1164
self.remove_all_exercises()
1165
Store.of(self).remove(self)
1167
414
class WorksheetExercise(Storm):
1168
"""A link between a worksheet and one of its exercises.
1170
These may be marked optional, in which case the exercise does not count
1171
for marking purposes. The sequence number is used to order the worksheet
1175
__storm_table__ = "worksheet_exercise"
1177
id = Int(primary=True, name="ws_ex_id")
415
__storm_table__ = "worksheet_problem"
416
__storm_primary__ = "worksheet_id", "exercise_id"
1179
418
worksheet_id = Int(name="worksheetid")
1180
419
worksheet = Reference(worksheet_id, Worksheet.id)
1181
exercise_id = Unicode(name="exerciseid")
420
exercise_id = Int(name="problemid")
1182
421
exercise = Reference(exercise_id, Exercise.id)
1183
422
optional = Bool()
1187
saves = ReferenceSet(id, "ExerciseSave.ws_ex_id")
1188
attempts = ReferenceSet(id, "ExerciseAttempt.ws_ex_id")
1190
424
__init__ = _kwarg_init
1192
426
def __repr__(self):
1193
427
return "<%s %s in %s>" % (type(self).__name__, self.exercise.name,
1194
self.worksheet.identifier)
1196
def get_permissions(self, user, config):
1197
return self.worksheet.get_permissions(user, config)
1200
430
class ExerciseSave(Storm):
1201
"""A potential exercise solution submitted by a user for storage.
1203
This is not an actual tested attempt at an exercise, it's just a save of
1204
the editing session.
1207
__storm_table__ = "exercise_save"
1208
__storm_primary__ = "ws_ex_id", "user_id"
1210
ws_ex_id = Int(name="ws_ex_id")
1211
worksheet_exercise = Reference(ws_ex_id, "WorksheetExercise.id")
432
Represents a potential solution to an exercise that a user has submitted
433
to the server for storage.
434
A basic ExerciseSave is just the current saved text for this exercise for
435
this user (doesn't count towards their attempts).
436
ExerciseSave may be extended with additional semantics (such as
439
__storm_table__ = "problem_save"
440
__storm_primary__ = "exercise_id", "user_id", "date"
442
exercise_id = Int(name="problemid")
443
exercise = Reference(exercise_id, Exercise.id)
1213
444
user_id = Int(name="loginid")
1214
445
user = Reference(user_id, User.id)
1215
446
date = DateTime()
1220
451
def __repr__(self):
1221
452
return "<%s %s by %s at %s>" % (type(self).__name__,
1222
self.worksheet_exercise.exercise.name, self.user.login,
1223
self.date.strftime("%c"))
453
self.exercise.name, self.user.login, self.date.strftime("%c"))
1225
455
class ExerciseAttempt(ExerciseSave):
1226
"""An attempt at solving an exercise.
1228
This is a special case of ExerciseSave, used when the user submits a
1229
candidate solution. Like an ExerciseSave, it constitutes exercise solution
1232
In addition, it contains information about the result of the submission:
1234
- complete - True if this submission was successful, rendering this
1235
exercise complete for this user in this worksheet.
1236
- active - True if this submission is "active" (usually true).
1237
Submissions may be de-activated by privileged users for
1238
special reasons, and then they won't count (either as a
1239
penalty or success), but will still be stored.
1242
__storm_table__ = "exercise_attempt"
1243
__storm_primary__ = "ws_ex_id", "user_id", "date"
457
An ExerciseAttempt is a special case of an ExerciseSave. Like an
458
ExerciseSave, it constitutes exercise solution data that the user has
459
submitted to the server for storage.
460
In addition, it contains additional information about the submission.
461
complete - True if this submission was successful, rendering this exercise
462
complete for this user.
463
active - True if this submission is "active" (usually true). Submissions
464
may be de-activated by privileged users for special reasons, and then
465
they won't count (either as a penalty or success), but will still be
468
__storm_table__ = "problem_attempt"
469
__storm_primary__ = "exercise_id", "user_id", "date"
1245
471
# The "text" field is the same but has a different name in the DB table
1246
472
# for some reason.
1247
473
text = Unicode(name="attempt")
1248
474
complete = Bool()
1251
def get_permissions(self, user, config):
1252
return set(['view']) if user is self.user else set()
1254
class TestSuite(Storm):
1255
"""A container to group an exercise's test cases.
1257
The test suite contains some information on how to test. The function to
1258
test, variables to set and stdin data are stored here.
1261
__storm_table__ = "test_suite"
1262
__storm_primary__ = "exercise_id", "suiteid"
1265
exercise_id = Unicode(name="exerciseid")
1266
description = Unicode()
1268
function = Unicode()
1270
exercise = Reference(exercise_id, Exercise.id)
1271
test_cases = ReferenceSet(suiteid, 'TestCase.suiteid', order_by="seq_no")
1272
variables = ReferenceSet(suiteid, 'TestSuiteVar.suiteid', order_by='arg_no')
1275
"""Delete this suite, without asking questions."""
1276
for variable in self.variables:
1278
for test_case in self.test_cases:
1280
Store.of(self).remove(self)
1282
class TestCase(Storm):
1283
"""A container for actual tests (see TestCasePart), inside a test suite.
1285
It is the lowest level shown to students on their pass/fail status."""
1287
__storm_table__ = "test_case"
1288
__storm_primary__ = "testid", "suiteid"
1292
suite = Reference(suiteid, "TestSuite.suiteid")
1295
test_default = Unicode() # Currently unused - only used for file matching.
1298
parts = ReferenceSet(testid, "TestCasePart.testid")
1300
__init__ = _kwarg_init
1303
for part in self.parts:
1305
Store.of(self).remove(self)
1307
class TestSuiteVar(Storm):
1308
"""A variable used by an exercise test suite.
1310
This may represent a function argument or a normal variable.
1313
__storm_table__ = "suite_variable"
1314
__storm_primary__ = "varid"
1318
var_name = Unicode()
1319
var_value = Unicode()
1320
var_type = Unicode()
1323
suite = Reference(suiteid, "TestSuite.suiteid")
1325
__init__ = _kwarg_init
1328
Store.of(self).remove(self)
1330
class TestCasePart(Storm):
1331
"""An actual piece of code to test an exercise solution."""
1333
__storm_table__ = "test_case_part"
1334
__storm_primary__ = "partid"
1339
part_type = Unicode()
1340
test_type = Unicode()
1342
filename = Unicode()
1344
test = Reference(testid, "TestCase.testid")
1346
__init__ = _kwarg_init
1349
Store.of(self).remove(self)
added
removed
ivle/database.py
