def create(self, validated_data):
# XXX: This behavior is wrong for services with several resources, find a better approach
resource_class = SupportedServices.get_related_models(
validated_data['service'])['resources'][0]
validated_data[
'resource_content_type'] = ContentType.objects.get_for_model(
resource_class)
return super(PriceListItemSerializer, self).create(validated_data)
def clean(self):
if not self.service:
raise ValidationError(_('Service is not defined.'))
if SupportedServices.is_public_service(self.service):
raise ValidationError(
_('Public service does not support price list items.'))
resource = self.default_price_list_item.resource_content_type.model_class(
)
valid_resources = SupportedServices.get_related_models(
self.service)['resources']
if resource not in valid_resources:
raise ValidationError(
_('Service does not support required content type.'))
def get_backend(self, service):
# project_uuid can be supplied in order to get a list of resources
# available for import (link) based on project, depends on backend implementation
project_uuid = self.request.query_params.get('project_uuid')
if project_uuid:
spl_class = SupportedServices.get_related_models(
service)['service_project_link']
try:
spl = spl_class.objects.get(project__uuid=project_uuid,
service=service)
except:
raise NotFound("Can't find project %s" % project_uuid)
else:
return spl.get_backend()
else:
return service.get_backend()
def get_queryset(self):
queryset = models.DefaultPriceListItem.objects.all()
service = self._find_service()
if service:
# Filter items by resource type
resources = SupportedServices.get_related_models(
service)['resources']
content_types = ContentType.objects.get_for_models(
*resources).values()
queryset = queryset.filter(resource_content_type__in=content_types)
# Attach service-specific items
price_list_items = models.PriceListItem.objects.filter(
service=service)
prefetch = Prefetch('pricelistitem_set',
queryset=price_list_items,
to_attr='service_item')
queryset = queryset.prefetch_related(prefetch)
return queryset
def change_price_list_items_if_default_was_changed(sender,
instance,
created=False,
**kwargs):
default_item = instance
if created:
# if new default item added - we create such item in for each service
model = default_item.resource_content_type.model_class()
service_class = SupportedServices.get_related_models(model)['service']
for service in service_class.objects.all():
models.PriceListItem.objects.create(
resource_content_type=default_item.resource_content_type,
service=service,
key=default_item.key,
item_type=default_item.item_type,
units=default_item.units,
value=default_item.value)
else:
if default_item.tracker.has_changed(
'key') or default_item.tracker.has_changed('item_type'):
# if default item key or item type was changed - it will be changed in each connected item
connected_items = models.PriceListItem.objects.filter(
key=default_item.tracker.previous('key'),
item_type=default_item.tracker.previous('item_type'),
resource_content_type=default_item.resource_content_type,
)
else:
# if default value or units changed - it will be changed in each connected item
# that was not edited manually
connected_items = models.PriceListItem.objects.filter(
key=default_item.key,
item_type=default_item.item_type,
resource_content_type=default_item.resource_content_type,
is_manually_input=False,
)
connected_items.update(key=default_item.key,
item_type=default_item.item_type,
units=default_item.units,
value=default_item.value)
