[PyQt] best way to manage forms?

[Linos]

Hello,
i have been reading about qdatawidgetmapper and qsqltablemodel or 
qsqltablerelationalmodel but i am not sure any combination of them can fills my 
needs or if i could do in a better way.

For an example form that i would need to manage i have a customer table and an 
address table (because for every customer they can have > 1 addresses) so in the 
same form i would like to edit all the possible data of the customer.

I would like to do without using tables for the fields (well to select the 
address to edit i can use a table but only to populate the data in the correct 
widgets), QSqlTableModel or QSqlRelationalTableModel dont seems to fit very well 
in this scenario, am i supposed to create two different QSqlTableModel and other 
two different QDataWidgetMapper (one for every table implicated)?, and if i want 
to select the customer searching for it how could i do?, setting a filter in the 
two models? i am not interested in next or previous buttons and 
qdatawidgetmapper seems to be all about them.

It is this the best way to create database forms with qt? i have been thinking 
about use SQLAlchemy to do this but i would like to go only with qt if it is 
possible because i would like to left open the possibility of a c++ port of the 
application. Any better idea o suggestion? Thanks.