Somehow dynamically register database classes

[mw44118]

Every class needs this boring code in configwrapper:

    psycopg2.extras.register_composite(
        'borderlinx_assets',
        pgconn,
        factory=BorderlinxAssetFactory)

And the factories so far have all been really simple:

class BorderlinxAssetFactory(psycopg2.extras.CompositeCaster):

def make(self, values):
    d = dict(zip(self.attnames, values))
    return BorderlinxAsset(**d)

It seems like I should be able to dynamically generate the Factory class. And then also I should be able to dynamically iterate through all the classes that are dynamically generated and register them for a table.

For example, imagine something like this in my BorderlinxAsset class:

class BorderlinxAsset(RelationWrapper):

    sql_table_name = "borderlinx_assets"

and then everything else should be easy to figure out.