Add datetime check to django.db.backends.util date/time functions

[cephelo@…]

Currently if you pass datetime types to the typecast_time and typecast_timestamp functions, they throw TypeErrors. A simple change enhances the functionality of these functions (attached a patch) in that if you pass a date/time/datetime, it simply returns it. Passing a different type to a function of the wrong type still returns raises exceptions as it does now.

Patch is against changeset:4086.

[cephelo@…]

django\db\backends\util.py patch

[Malcolm Tredinnick]

Why is this needed? Those conversion functions are only intended for use by database backends and if a backend can do the conversion to Python datetime types natively, it doesn't need to call the conversion functions. Is there are backend that does not behave this way?

[cephelo@…]

This isn't needed anymore, no. At the time, MySQLdb for Win32 was doing some wonky things, but I think it has evened out. I haven't used the patch since shortly after I posted it.