(Real)DictConnection is not compatible with the adaptation mechanism

I tried to register an adapter for a SQL type following the examples
and the documentation and it all worked fine.
My problem manifested itself when I tried to integrate the code with
the real application which uses (Real)DictConnection.

When I register the new type with:

psycopg2.extensions.register_type(NEWTYPE, conn)

it breaks with the following error:

TypeError: argument 2 must be a connection, cursor or None

which is located in psycopgmodule.c in function psyco_register_type.

It seems that it checks for "cursorType" and "connectionType"
preventing inherited objects to work with the adaptation mechanism:

psyco_register_type(PyObject *self, PyObject *args)
{
   [...]

    if (obj != NULL) {
        if (obj->ob_type == &cursorType) {
            _psyco_register_type_set(&(((cursorObject*)obj)->string_types),
type);
        }
        else if (obj->ob_type == &connectionType) {
            typecast_add(type, ((connectionObject*)obj)->string_types, 0);
        }
        else {
            PyErr_SetString(PyExc_TypeError,
                "argument 2 must be a connection, cursor or None");
            return NULL;
        }
    }

  [..]

Is there a way to work around it?

-- 
Lawrence, http://oluyede.org - http://twitter.com/lawrenceoluyede
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