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From: Christophe Pettus <[email protected]>
To: [email protected]
Subject: Overriding default adapters in psycopg
Date: Sun, 16 Nov 2025 08:56:07 -0800
Message-ID: <[email protected]> (raw)

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 about it (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.

Thanks!

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