5 from django.db import models
6 from django.contrib.auth.models import User
7 from django.core.exceptions import ValidationError
8 from django.utils import simplejson
9 from django.utils.translation import ugettext as _
10 from jsonfield import JSONField
12 from contact.models import Contact
14 f = file(os.path.dirname(__file__) + '/fixtures/exercises.json')
15 exercises = simplejson.loads(f.read())
20 class Submission(models.Model):
21 contact = models.ForeignKey(Contact, null = True)
22 key = models.CharField(max_length = 30, unique = True)
23 first_name = models.CharField(max_length = 100)
24 last_name = models.CharField(max_length = 100)
25 email = models.EmailField(max_length = 100, unique = True)
26 answers = models.CharField(max_length = 65536, null = True, blank = True)
27 key_sent = models.BooleanField(default = False)
29 examiners = models.ManyToManyField(User, null = True, blank = True)
31 def __unicode__(self):
32 return ', '.join((self.last_name, self.first_name, self.email))
35 def generate_key(cls):
37 while not key or key in [record['key'] for record in cls.objects.values('key')]:
38 key = ''.join(random.choice(string.ascii_uppercase + string.ascii_lowercase + string.digits) for i in range(30))
42 def create(cls, first_name, last_name, email, key = None, contact = None):
45 key = key if key else Submission.generate_key(),
46 first_name = first_name,
47 last_name = last_name,
54 def get_mark(self, user_id, exercise_id):
56 user_id = str(user_id)
57 exercise_id = str(exercise_id)
58 if self.marks and user_id in self.marks:
59 mark = self.marks[user_id].get(exercise_id, None)
62 def set_mark(self, user_id, exercise_id, mark):
63 user_id = str(user_id)
64 exercise_id = str(exercise_id)
68 self.marks.setdefault(user_id, {})[exercise_id] = mark
70 del self.marks[user_id][exercise_id]
73 class Attachment(models.Model):
74 submission = models.ForeignKey(Submission)
75 exercise_id = models.IntegerField()
76 file = models.FileField(upload_to = 'wtem/attachment')
79 class Assignment(models.Model):
80 user = models.ForeignKey(User, unique = True)
81 exercises = JSONField()
84 if not isinstance(self.exercises, list):
85 raise ValidationError(_('Assigned exercises must be declared in a list format'))
86 for exercise in self.exercises:
87 if not isinstance(exercise, int) or exercise < 1:
88 raise ValidationError(_('Invalid exercise id: %s' % exercise))
90 def __unicode__(self):
91 return self.user.username + ': ' + ','.join(map(str,self.exercises))