Simply you have to put this on your model:
class MyModel(db.Model):
...
mydata = JSONProperty()
...
And write mydata as you want, for example:
mymodel.mydata = {
'hello': 'world',
'bye': 'world',
}
The same for reading:
mymodel.mydata['hello'] # == 'world'
mymodel.mydata['bye'] # == 'world'
This is the code for JSONProperty:
from google.appengine.ext import db
import simplejson
class JSONProperty(db.TextProperty):
def validate(self, value):
return value
def get_value_for_datastore(self, model_instance):
result = super(JSONProperty,
self).get_value_for_datastore(model_instance)
result = simplejson.dumps(result)
return db.Text(result)
def make_value_from_datastore(self, value):
try:
value = simplejson.loads(str(value))
except:
pass
return super(JSONProperty, self).make_value_from_datastore(value)
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