if it's as bad as 6 to 8 seconds, have you looked at creating a list
of string for the property names? i know its more maintenance
overhead, but might be worth the tradeoff..
ex:
class SerializableModel(object):
serializable = []
def to_json(self):
result = []
for x in self.serializable:
result.append(self.__dict__[x])
## append values from self.properties().items()
class A(db.Model, SerializableModel):
serializable = ['user_keys']
_user_keys = db.StringListProperty(default=[], indexed=False)
@property
def user_keys(self):
return [db.Key(x) for x in self._user_keys]
@property
def user_keys_count(self):
"""not in serializable list"""
return len(self._user_keys)
On Jan 10, 9:05 am, Andreas <a.schmi...@gmail.com> wrote:
> hi,
>
> im using more or less this
> (http://www.awebcoder.com/post/91001/extended-jsonify-function-for-app...)
> jsonify function to serialize whatever object i pass into the jsonify()
> function and i have to say it does all i need and works pretty good.
> the only downside i see right now is the speed. if i try to serialize 50
> db.Model objects with around 10 properties each in production it takes 6-8
> seconds which is not exactly what i would expect.
>
> is there a way to make this part of code more performant?
> for property in dir(obj):
> if property[0] != '_':
> try:
> value = obj.__getattribute__(property)
> valueClass = str(value.__class__)
> if not(('function' in valueClass) or ('built' in valueClass)
> or ('method' in valueClass)):
> value = dumps(value)
> if value != None:
> properties[property] = value
> else:
> properties[property] = ""
> except: continue
> if len(properties) == 0:
> return str(obj)
> else:
> return properties
>
> i know i could use obj.properties().items() to loop over the properties but i
> would not be able to serialize properties which are @property functions
> because those don't get listed in the obj.properties() list.
>
> right now im caching the results so im gaining speed because i get the result
> from memcache but when i flush the cache or the memcached result is not
> available it takes too much until the result is ready.
>
> thx
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