Hello,
I have found very strange behaviour.
In my app I have one serializer for partial update and one for data with
nested representations.
This block of code:
@database_sync_to_async
def _update_order(self, content):
instance = Order.objects.get(id=content.get('id'))
serializer = UpdateOrderSerializer(data=content, partial=True)
serializer.is_valid(raise_exception=True)
order = serializer.update(instance, serializer.validated_data)
#if u remove print u get an error ???
print(order)
return order
Couses error
1. app_1 | Exception inside application: You cannot call this from an
async context - use a thread or sync_to_async.
2. app_1 | Traceback (most recent call last):
3. app_1 | File
"/usr/local/lib/python3.7/site-packages/django/db/models/fields/related_descriptors.py"
, line 172, in __get__
4. app_1 | rel_obj = self.field.get_cached_value(instance)
5. app_1 | File
"/usr/local/lib/python3.7/site-packages/django/db/models/fields/mixins.py"
, line 13, in get_cached_value
6. app_1 | return instance._state.fields_cache[cache_name]
7. app_1 | KeyError: 'premises'
But when I uncomment print(order)
Evertything as it should.
I have no idea why if u know im looking forward to hear.
Full code:
https://github.com/swrzalek/onboard/blob/master/app/orders/consumers.py
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