class Exam(db.Model):
__versioned__ = {}
__tablename__ = 'exam'
__mapper_args__ = {'order_by': 'name'}
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String, info={'label': 'Navn'})
course_id = db.Column(db.Integer, db.ForeignKey('course.id'))
questions = db.relationship('Question', backref='exam')
def __init__(self, name=None, course_id=None):
self.name = name
self.course_id = course_id
@cached_property
def question_count(self):
return Question.query.filter_by(exam=self).count()
def question(self, id):
return Question.query.filter_by(exam=self).offset(id - 1).limit(1)
def stats(self):
from memorizer.utils import generate_stats
return generate_stats(course_code=self.course.code,
exam_name=self.name)
def __repr__(self):
return self.name
def serialize(self):
return {'id': self.id, 'name': self.name, 'course_id': self.course_id}
@property
def string(self):
return self.course.code + '_' + self.name
class Stats(db.Model):
__tablename__ = 'stats'
__mapper_args__ = {'order_by': 'id'}
id = db.Column(db.Integer, primary_key=True)
question_id = db.Column(db.Integer, db.ForeignKey('question.id'))
user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
correct = db.Column(db.Boolean)
reset = db.Column(db.Boolean)
question = db.relationship('Question', backref='stats')
user = db.relationship('User', backref='stats')
def __init__(self, user, question, correct):
self.user_id = user.id
self.question_id = question.id
self.correct = correct
self.reset = False
@classmethod
def course(cls, user, course_code):
course_m = Course.query.filter_by(code=course_code).one_or_none()
questions = Question.query.filter_by(course=course_m)
return cls.query.filter(
Stats.reset.is_(False),
Stats.user_id == user.id,
Stats.question_id.in_(questions.with_entities(Question.id))
)
@classmethod
def exam(cls, user, course_code, exam_name):
course_m = Course.query.filter_by(code=course_code).one_or_none()
exam_m = Exam.query.filter_by(course=course_m, name=exam_name).one_or_none()
questions = Question.query.filter_by(exam=exam_m)
return cls.query.filter(
Stats.reset.is_(False),
Stats.user_id == user.id,
Stats.question_id.in_(questions.with_entities(Question.id))
)
@classmethod
def answered(cls, user, question):
return cls.query.filter_by(user=user, question=question, reset=False).count() > 0
class Course(db.Model):
__versioned__ = {}
__tablename__ = 'course'
__mapper_args__ = {'order_by': 'code'}
id = db.Column(db.Integer, primary_key=True)
code = db.Column(db.String(80),
unique=True,
nullable=False,
info={'label': 'course code'})
name = db.Column(db.String(120), nullable=False, info={'label': 'name'})
exams = db.relationship('Exam', backref='course')
questions = association_proxy('exams', 'questions')
def __init__(self, code=None, name=None):
self.code = code
self.name = name
@cached_property
def question_count(self):
return Question.query\
.filter_by(course=self).join(Question.exam)\
.filter(Exam.hidden.is_(False)).count()
def question(self, id):
return Question.query\
.filter_by(course=self)\
.join(Question.exam)\
.filter(Exam.hidden.is_(False))\
.offset(id - 1).limit(1)
def stats(self):
from memorizer.utils import generate_stats
return generate_stats(course_code=self.code)
def __repr__(self):
return self.code + ' ' + self.name
def serialize(self):
return {
'id': self.id,
'code': self.code,
'name': self.name,
'str': str(self)
}
@property
def string(self):
return self.code
class Question(db.Model):
__versioned__ = {}
MULTIPLE = '1'
BOOLEAN = '2'
TYPES = [
(MULTIPLE, 'Flervalg'),
(BOOLEAN, 'Ja/Nei')
]
__tablename__ = 'question'
__mapper_args__ = {'order_by': 'id'}
id = db.Column(db.Integer, primary_key=True)
text = db.Column(db.String, info={'label': 'Oppgavetekst'})
image = db.Column(db.String, info={'label': 'Bilde'})
exam_id = db.Column(db.Integer, db.ForeignKey('exam.id'))
course = association_proxy('exam', 'course')
reason = db.Column(db.String, info={'label': 'Forklaring'})
type = db.Column(ChoiceType(TYPES), info={'label': 'Spørsmålstype'})
# Boolean question
correct = db.Column(db.Boolean, info={'label': 'Korrekt'})
# Alternative question
alternatives = db.relationship('Alternative', backref='question', order_by='Alternative.id')
def __init__(self, type=None, text=None, exam_id=None, image="", correct=None):
self.type = type
self.text = text
self.exam_id = exam_id
self.image = image
self.correct = correct
def __repr__(self):
return self.text
@property
def multiple(self):
return self.type == self.MULTIPLE
@property
def choices(self):
if self.multiple:
return self.alternatives
@property
def index(self):
return Question.find_index(self)
@classmethod
def find_index(cls, question):
indexes = [q.id for q in cls.query.filter_by(exam_id=question.exam_id).all()]
return indexes.index(question.id) + 1
def serialize(self):
response = {
'id': self.id,
'text': self.text,
'exam_id': self.exam_id,
'multiple': self.multiple,
'type': self.type.code
}
if self.multiple:
response['alternatives'] = []
for alt in self.alternatives:
alt_dict = alt.serialize()
del alt_dict['question_id']
response['alternatives'].append(alt_dict)
else:
response['correct'] = self.correct
if self.image:
if self.image.startswith('http://'):
response['image'] = self.image
else:
# this is not efficient
response['image'] = url_for('static', filename='img/' + self.course.code + '/' + self.image)
return response
class Exam(db.Model):
__versioned__ = {}
__tablename__ = 'exam'
__mapper_args__ = {'order_by': 'name'}
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String, info={'label': 'name'})
course_id = db.Column(db.Integer, db.ForeignKey('course.id'))
questions = db.relationship('Question', backref='exam')
multiple_correct = db.Column(
db.Boolean,
server_default=literal(False),
nullable=False,
default=False,
info={'label': 'more correct answers per question'})
hidden = db.Column(db.Boolean,
server_default=literal(False),
nullable=False,
default=False,
info={
'label': 'hide',
'admin': True
})
def __init__(self, name=None, course_id=None, multiple_correct=False):
self.name = name
self.course_id = course_id
self.multiple_correct = multiple_correct
@cached_property
def question_count(self):
return Question.query.filter_by(exam=self).count()
def question(self, id):
if self.hidden:
return None
return Question.query.filter_by(exam=self).offset(id - 1).limit(1)
def stats(self):
from memorizer.utils import generate_stats
return generate_stats(course_code=self.course.code,
exam_name=self.name)
def __repr__(self):
return self.name
def serialize(self):
# Hack to hide hidden exams
if self.hidden:
user = get_user()
if not user.admin:
return None
return {
'id': self.id,
'name': self.name,
'course_id': self.course_id,
'multiple_correct': self.multiple_correct,
}
@property
def string(self):
return self.course.code + '_' + self.name