Revision: 10289
Initial Code
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at December 16, 2008 08:40 by tamuratetsuya
Initial Code
from google.appengine.ext import db
from google.appengine.api import datastore_types
from django.utils import simplejson
class JSONProperty(db.Property):
def get_value_for_datastore(self, model_instance):
value = super(JSONProperty, self).get_value_for_datastore(model_instance)
return self._deflate(value)
def validate(self, value):
return self._inflate(value)
def make_value_from_datastore(self, value):
return self._inflate(value)
def _inflate(self, value):
if value is None:
return {}
if isinstance(value, unicode) or isinstance(value, str):
return simplejson.loads(value)
return value
def _deflate(self, value):
return simplejson.dumps(value)
data_type = datastore_types.Text
class Person(db.Model):
address_book = JSONProperty()
person = Person(address_book = {
"alice": { "phone": "555-555-5555", "email": "[email protected]" } })
person.address_book["bob"] = { "email": "[email protected]" }
person.put()
...
some_person = db.get(key)
logging.info("Phone number for alice is " + some_person.address_book["alice"]["phone"])
Initial URL
Initial Description
Initial Title
Add a JSONProperty to your Model to save a dict to the datastore
Initial Tags
google, python, django
Initial Language
Python