class PromoCode(TimestampedModel):
objects = PromoCodeQuerySet.as_manager()
name = models.CharField(_('Promo Code'),
max_length=32,
unique=True,
db_index=True)
discount_percent = models.IntegerField(_('Discount percent'))
active = models.BooleanField(_('Active'), default=True)
comment = models.TextField(_('Comment'), blank=True, null=True)
courses = models.ManyToManyField(
'products.Course',
help_text=_('Can not be used for courses not checked here'),
blank=True)
class Meta:
verbose_name = _('Promo Code')
verbose_name_plural = _('Promo Codes')
def compatible_with(self, course: Course) -> bool:
return self.courses.count() == 0 or course in self.courses.all()
def apply(self, course: Course) -> Decimal:
if not self.compatible_with(course):
return course.price
return Decimal(course.price * (100 - self.discount_percent) / 100)
class Question(TimestampedModel):
slug = models.UUIDField(db_index=True, unique=True, default=uuid.uuid4)
courses = models.ManyToManyField('products.Course')
name = models.CharField(_('Name'), max_length=256)
text = MarkdownxField()
class Meta:
verbose_name = _('Homework')
verbose_name_plural = _('Homeworks')
permissions = [
('see_all_questions', _('May see questions for all homeworks')),
]
def get_absolute_url(self):
return urljoin(settings.FRONTEND_URL,
f'homework/questions/{self.slug}/')
def dispatch_crosscheck(self, *args, **kwargs):
from homework.services import QuestionCrossCheckDispatcher
dispatcher = QuestionCrossCheckDispatcher(question=self,
*args,
**kwargs)
return dispatcher()
class Bundle(Shippable):
records = models.ManyToManyField('products.Record')
courses = models.ManyToManyField('products.Course')
class Meta:
ordering = ['-id']
verbose_name = _('Bundle')
verbose_name_plural = _('Bundles')
db_table = 'courses_bundle'
def ship(self, *args, **kwargs):
for record in self.records.iterator():
record.ship(*args, **kwargs)
for course in self.courses.iterator():
course.ship(*args, **kwargs)
class Bundle(Shippable):
records = models.ManyToManyField('courses.Record')
courses = models.ManyToManyField('courses.Course')
class Meta:
ordering = ['-id']
verbose_name = _('Bundle')
verbose_name_plural = _('Bundles')
def get_absolute_url(self):
return urljoin(settings.FRONTEND_URL, '/'.join(['bundles', self.slug, '']))
def ship(self, to):
for record in self.records.iterator():
record.ship(to=to)
for course in self.courses.iterator():
course.ship(to=to)
class Bundle(Shippable):
records = models.ManyToManyField('products.Record')
courses = models.ManyToManyField('products.Course')
class Meta:
ordering = ['-id']
verbose_name = _('Bundle')
verbose_name_plural = _('Bundles')
db_table = 'courses_bundle'
def iterate_bundled_items(self) -> Generator[Shippable, None, None]:
yield from self.records.iterator()
yield from self.courses.iterator()
def ship(self, *args, **kwargs):
for item in self.iterate_bundled_items():
item.ship(*args, **kwargs)
def unship(self, *args, **kwargs):
for item in self.iterate_bundled_items():
item.unship(*args, **kwargs)
class Question(TimestampedModel):
slug = models.UUIDField(db_index=True, unique=True, default=uuid.uuid4)
courses = models.ManyToManyField('products.Course')
name = models.CharField(_('Name'), max_length=256)
text = MarkdownxField()
class Meta:
verbose_name = _('Homework')
verbose_name_plural = _('Homeworks')
def get_absolute_url(self):
return urljoin(settings.FRONTEND_URL, f'/homework/questions/{self.slug}/')