def update_cache(self, pk, key, value):
cache = SimpleCache(self._meta.cache_key_format, self._meta.cache_duration,
lambda **kwargs: self(kwargs['pk']).to_dict())
original = cache.get(pk=pk)
if original:
original[key] = value
cache.set(original, pk=pk)
def serialize(self, resource_instance, options=None, request=None):
"""
Serialize a resource instance. This method must return a json-convertible dictionary.
This method use caches if available.
"""
def load_cache(**_kwargs):
return self.instance_to_python(resource_instance, exclude=self._meta.cache_ignored, options=options,
request=request, **_kwargs)
if self._meta.cache_key_format:
cache = SimpleCache(self._meta.cache_key_format, self._meta.cache_duration, load_cache)
ret = cache.get(pk=resource_instance._pk)
else:
ret = load_cache(pk=resource_instance._pk)
if self._meta.cache_ignored:
ret.update(self.instance_to_python(resource_instance,
fields=self._meta.cache_ignored + self._meta.cache_ignored_virtual_only,
request=request))
elif self._meta.cache_ignored_virtual_only:
ret.update(
resource_instance.all_virtual_items(fields=self._meta.cache_ignored_virtual_only, request=request))
if self._meta.filter_include or self._meta.filter_exclude:
ret = recursive_dict_filter(ret, self._meta.filter_include, self._meta.filter_exclude)
if options:
if 'date_format' in options:
is_timestamp_mode = options['date_format'] == 'F'
if is_timestamp_mode:
for each in self._meta.date_format_fields:
if each in ret and ret[each]:
ret[each] = str(datetime.datetime.fromtimestamp(int(ret[each])))
return ret
