id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
12541	Add support for describing master/slave arrangements in multi-db	Russell Keith-Magee	nobody	"Django's multidb setup can be used to implement master/slave database arrangements - however, there is no allowance made for the fact that an object retrieved from a slave is actually compatible with an object retrieved from the master (or, for that matter, another slave). 

It should be possible to define data relationships in DATABASES, and have instance._state.db reflect those relationships - i.e., the database state should describe the actual data *source*, not just the databse from which the data was retrieved.

Once this support is in place, the cross-database validation checks (that were commented out just before the merge of the soc branch) can be reintroduced. Those checks should be modified to check the source, not the raw db alias.

There has been [http://groups.google.com/group/django-developers/browse_thread/thread/286cc88ad9953df4 some initial discussion on django-dev] about this subject.
"		closed	Database layer (models, ORM)	1.2-alpha		fixed		Jeff Balogh	Accepted	0	0	0	0	0	0