On Nov 19, 8:14 pm, Michael Bayer wrote:
> The ORM uses attribute set events to flag changes. It then uses the
> "previous" value, if present, to determine if a change has taken place at
> flush time, and if so issues an UPDATE. If "previous" is not present, in
> most cases we don't need t
On Nov 19, 2010, at 1:41 PM, Eoghan Murray wrote:
> I guess I can't disable the mutability flag?
not if you're changing the value "inline". If you assign a new value, then you
don't need "mutability".
>
> From reading up on mutability:
> http://www.sqlalchemy.org/docs/core/types.html#sqlalc
Thanks for the reply, yes it is a mutable type:
import jsonpickle
class JsonType(types.MutableType, types.TypeDecorator):
impl = types.Unicode
def process_bind_param(self, value, engine):
return unicode(jsonpickle.encode(value))
def process_result_val
