Re: Overriding default adapters in psycopg

On 11/16/25 08:56, Christophe Pettus wrote:
> Hi!
> 
> I am attempting to override the default adapters for JSON and JSONB in psycopg (3), but I am not quite sure how to go
aboutit (I'm testing using orjson for serialization and deserialization).  This doesn't appear to work:
 
> 
>> class CyanJSONBLoader(Loader):
>>      def load(self, data):
>>          return orjson.loads(data)
>>
>> psycopg.adapters.register_loader("jsonb", CyanJSONBLoader)
>>
>> class CyanJSONBDumper(Dumper):
>>      def dump(self, obj):
>>          return orjson.dumps(obj)
>>
>> psycopg.adapters.register_dumper("jsonb", CyanJSONBDumper)
>>
> 
> The calls work, but the dump/load functions are never called.

I think you might need to use:

https://www.psycopg.org/psycopg3/docs/basic/adapt.html#adapt-json


> 
> Thanks!
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com