Re: Change in datetime type casting

On Thu, Jun 28, 2012 at 7:30 AM, Federico Di Gregorio <fog@dndg.it> wrote:
> On 28/06/12 01:19, Adrian Klaver wrote:

>> Note the addition of the casts. This is causing problems when using the
>> hstore adapter as hstore expects a plain string. Is there a way to get
>> around this?
>
> The cast were introduced because PostgreSQL 9.x is much strictier about
> function signatures than the 8.x series. Sometimes functions taking
> parameters were not found because of the implicit text->other type cast.

Hstore is a mapping from strings to strings, not a generic dictionary
mapping. There's never been a promise to adapt generic python
dictionary (mapping hashable -> anything) into it. Even if you ram a
python date into a postgres hstore, reading it back you will get a
string.

You can write a custom adapter to map the datetimes to strings without
the cast and use them into hstore.

-- Daniele