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 def get_exercise_marks_by_examiner(self, exercise_id):
75 for examiner_id, examiner_marks in self.marks.items():
76 mark = examiner_marks.get(exercise_id, None)
78 marks[examiner_id] = mark
81 def get_final_exercise_mark(self, exercise_id):
82 exercise = exercises[int(exercise_id)-1]
83 if exercise_checked_manually(exercise):
84 marks_by_examiner = self.get_exercise_marks_by_examiner(exercise_id)
85 if len(marks_by_examiner):
86 return max(map(int, marks_by_examiner.values()))
90 return 1 # TODO: actually calculate the result
93 def final_result(self):
95 for exercise_id in map(str,range(1, len(exercises) + 1)):
96 mark = self.get_final_exercise_mark(exercise_id)
102 class Attachment(models.Model):
103 submission = models.ForeignKey(Submission)
104 exercise_id = models.IntegerField()
105 file = models.FileField(upload_to = 'wtem/attachment')
108 class Assignment(models.Model):
109 user = models.ForeignKey(User, unique = True)
110 exercises = JSONField()
113 if not isinstance(self.exercises, list):
114 raise ValidationError(_('Assigned exercises must be declared in a list format'))
115 for exercise in self.exercises:
116 if not isinstance(exercise, int) or exercise < 1:
117 raise ValidationError(_('Invalid exercise id: %s' % exercise))
119 def __unicode__(self):
120 return self.user.username + ': ' + ','.join(map(str,self.exercises))
123 def exercise_checked_manually(exercise):
124 return (exercise['type'] in ('open', 'file_upload')) or 'open_part' in exercise