def update(self, instance, validated_data: dict):
"""
Update and save an existing instance
"""
save = False
cohort_settings = {}
for field, value in validated_data.items():
if field in self.Meta.fields:
setattr(instance, field, value)
save = True
elif field in self.Meta.fields_cohorts:
cohort_settings[field] = value
if cohort_settings:
discussion_settings = CourseDiscussionSettings.get(instance.id)
serializer = DiscussionSettingsSerializer(
discussion_settings,
context={
'course': instance,
'settings': discussion_settings,
},
data=cohort_settings,
partial=True,
)
if serializer.is_valid(raise_exception=True):
serializer.save()
if save:
modulestore().update_item(instance, self.context['user_id'])
return instance
def patch(self, request, course_id):
"""
Implement a handler for the PATCH method.
"""
if request.content_type != MergePatchParser.media_type:
raise UnsupportedMediaType(request.content_type)
kwargs = self._get_request_kwargs(course_id)
form = CourseDiscussionSettingsForm(kwargs, request_user=request.user)
if not form.is_valid():
raise ValidationError(form.errors)
course = form.cleaned_data['course']
course_key = form.cleaned_data['course_key']
discussion_settings = CourseDiscussionSettings.get(course_key)
serializer = DiscussionSettingsSerializer(
discussion_settings,
context={
'course': course,
'settings': discussion_settings,
},
data=request.data,
partial=True,
)
if not serializer.is_valid():
raise ValidationError(serializer.errors)
serializer.save()
return Response(status=status.HTTP_204_NO_CONTENT)