Framework design question

[Alan Harris-Reid]

Hi,

When committing data that has originally come from a webpage, sometimes 
data has to be converted to a data type or format which is suitable for 
the back-end database.  For instance, a date in 'dd/mm/yyyy' format 
needs to be converted to a Python date-object or 'yyyy-mm-dd' in order 
to be stored in a SQLite date column (SQLite will accept 'dd/mm/yy', but 
that can cause problems when data is retrieved).

Question - at what point should the data be converted?
     a) As part of a generic web_page_save() method (immediately after 
data validation, but before a row.table_update() method is called).
     b) As part of row.table_update() (a data-object method called from 
web- or non-web-based applications, and includes construction of a 
field-value parameter list prior to executing the UPDATE command).

In other words, from a framework point-of-view, does the data-conversion 
belong to page-object processing or data-object processing?

Any opinions would be appreciated.

Alan