119 lines
3.7 KiB
Python
119 lines
3.7 KiB
Python
"""
|
|
Models for the custom course feature
|
|
"""
|
|
from __future__ import unicode_literals
|
|
|
|
import json
|
|
import logging
|
|
from datetime import datetime
|
|
|
|
from ccx_keys.locator import CCXLocator
|
|
from django.contrib.auth.models import User
|
|
from django.db import models
|
|
from lazy import lazy
|
|
from pytz import utc
|
|
|
|
from openedx.core.djangoapps.xmodule_django.models import CourseKeyField, LocationKeyField
|
|
from xmodule.error_module import ErrorDescriptor
|
|
from xmodule.modulestore.django import modulestore
|
|
|
|
log = logging.getLogger("edx.ccx")
|
|
|
|
|
|
class CustomCourseForEdX(models.Model):
|
|
"""
|
|
A Custom Course.
|
|
"""
|
|
course_id = CourseKeyField(max_length=255, db_index=True)
|
|
display_name = models.CharField(max_length=255)
|
|
coach = models.ForeignKey(User, db_index=True)
|
|
# if not empty, this field contains a json serialized list of
|
|
# the master course modules
|
|
structure_json = models.TextField(verbose_name='Structure JSON', blank=True, null=True)
|
|
|
|
class Meta(object):
|
|
app_label = 'ccx'
|
|
|
|
@lazy
|
|
def course(self):
|
|
"""Return the CourseDescriptor of the course related to this CCX"""
|
|
store = modulestore()
|
|
with store.bulk_operations(self.course_id):
|
|
course = store.get_course(self.course_id)
|
|
if not course or isinstance(course, ErrorDescriptor):
|
|
log.error("CCX {0} from {2} course {1}".format( # pylint: disable=logging-format-interpolation
|
|
self.display_name, self.course_id, "broken" if course else "non-existent"
|
|
))
|
|
return course
|
|
|
|
@lazy
|
|
def start(self):
|
|
"""Get the value of the override of the 'start' datetime for this CCX
|
|
"""
|
|
# avoid circular import problems
|
|
from .overrides import get_override_for_ccx
|
|
return get_override_for_ccx(self, self.course, 'start')
|
|
|
|
@lazy
|
|
def due(self):
|
|
"""Get the value of the override of the 'due' datetime for this CCX
|
|
"""
|
|
# avoid circular import problems
|
|
from .overrides import get_override_for_ccx
|
|
return get_override_for_ccx(self, self.course, 'due')
|
|
|
|
@lazy
|
|
def max_student_enrollments_allowed(self):
|
|
"""
|
|
Get the value of the override of the 'max_student_enrollments_allowed'
|
|
datetime for this CCX
|
|
"""
|
|
# avoid circular import problems
|
|
from .overrides import get_override_for_ccx
|
|
return get_override_for_ccx(self, self.course, 'max_student_enrollments_allowed')
|
|
|
|
def has_started(self):
|
|
"""Return True if the CCX start date is in the past"""
|
|
return datetime.now(utc) > self.start
|
|
|
|
def has_ended(self):
|
|
"""Return True if the CCX due date is set and is in the past"""
|
|
if self.due is None:
|
|
return False
|
|
|
|
return datetime.now(utc) > self.due
|
|
|
|
@property
|
|
def structure(self):
|
|
"""
|
|
Deserializes a course structure JSON object
|
|
"""
|
|
if self.structure_json:
|
|
return json.loads(self.structure_json)
|
|
return None
|
|
|
|
@property
|
|
def locator(self):
|
|
"""
|
|
Helper property that gets a corresponding CCXLocator for this CCX.
|
|
|
|
Returns:
|
|
The CCXLocator corresponding to this CCX.
|
|
"""
|
|
return CCXLocator.from_course_locator(self.course_id, unicode(self.id))
|
|
|
|
|
|
class CcxFieldOverride(models.Model):
|
|
"""
|
|
Field overrides for custom courses.
|
|
"""
|
|
ccx = models.ForeignKey(CustomCourseForEdX, db_index=True)
|
|
location = LocationKeyField(max_length=255, db_index=True)
|
|
field = models.CharField(max_length=255)
|
|
|
|
class Meta(object):
|
|
app_label = 'ccx'
|
|
unique_together = (('ccx', 'location', 'field'),)
|
|
|
|
value = models.TextField(default='null')
|