Yes, that worked. Thanks for the suggestion, Massima.
On Mar 7, 5:12 pm, Massimo Di Pierro <massimo.dipie...@gmail.com>
wrote:
> can you try Field('description', 'text', length = 2048),
>
>
>
>
>
>
>
> On Wednesday, 7 March 2012 15:48:51 UTC-6, David Phillips wrote:
>
> > I have an App Engine web app in production. I defined a field in a
> > database table as a string with no length.
>
> > Field('description'),
>
> > Now I find that the field needs to handle 2,000 characters. That means
> > that the field needs to be changed in the Datastore entity from a
> > ByteString type to a Blob type. I don't,however, want to accidentally
> > delete data, and I'm unsure how to safely convert the field to handle
> > a 2K string.
>
> > I did try one thing. I changed the field to
>
> > Field('description', length = 2048),
>
> > When I deployed the new code, the field remained a string and an
> > attempt to store more than 500 characters caused an exception.
>
> > So is there any way to migrate the existing string field to a blob?
> > And if so, how would one go about it?
>
> > By the way, there was already a bit of a mismatch. The default string
> > field in the DAL is supposed to be 512 bytes. When deployed on
> > appengine, that causes the creation of a ByteString which has a
> > maximum size of 500 characters.
