def clean(self):
"""
Validate the model.
Currently, this only support courses, this can be extended
whenever discussions are available in other contexts
"""
if not CourseOverview.course_exists(self.context_key):
raise ValidationError('Context Key should be an existing learning context.')
def _ensure_course_exists(course_key, user_key_or_id):
"""
Log and raise an error if `course_key` does not refer to a real course run.
`user_key_or_id` should be a non-PII value identifying the user that
can be used in the log message.
"""
if CourseOverview.course_exists(course_key):
return
logger.error("Cannot enroll user={} in non-existent course={}".format(
user_key_or_id,
course_key,
))
raise NonExistentCourseError
def wrapped_function(self, request, **kwargs):
"""
Wraps the given view_function.
"""
try:
course_key = get_course_key(request, kwargs.get('course_id'))
except InvalidKeyError as error:
raise self.api_error(
status_code=status.HTTP_404_NOT_FOUND,
developer_message='The provided course key cannot be parsed.',
error_code='invalid_course_key'
) from error
if not CourseOverview.course_exists(course_key):
raise self.api_error(
status_code=status.HTTP_404_NOT_FOUND,
developer_message=missing_course_error_message.format(course=str(course_key)),
error_code='course_does_not_exist'
)
return view_func(self, request, **kwargs)
def wrapped_function(self, request, **kwargs):
"""
Wraps the given view_function.
"""
try:
course_key = get_course_key(request, kwargs.get('course_id'))
except InvalidKeyError:
raise self.api_error( # lint-amnesty, pylint: disable=raise-missing-from
status_code=status.HTTP_404_NOT_FOUND,
developer_message='The provided course key cannot be parsed.',
error_code='invalid_course_key'
)
if not CourseOverview.course_exists(course_key):
raise self.api_error(
status_code=status.HTTP_404_NOT_FOUND,
developer_message="Requested grade for unknown course {course}".format(course=str(course_key)),
error_code='course_does_not_exist'
)
return view_func(self, request, **kwargs)
