get_list() with foreignkey-parameters

[patrick kranzlmüller]

first issue:
this works fine:
milestone_list = milestones.get_list(id__exact=3, order_by=['-id'])

this doesn´t:
milestone_list = milestones.get_list(responsible__exact=1, 
order_by=['-id'])

the model looks like;
responsible = meta.ForeignKey(auth.User)


second issue:

i´m now able to display the username with my app. still, i´d like to 
have something like
milestone_list = milestones.get_list(responsible__exact=user.id, 
order_by=['-id'])

i don´t know if this is correct for "responsible__exact" is obviously 
wrong.

thanks in advance.
patrick