How Can I Populate Default Form Data with a ManyToMany Field?
- by b14ck
Ok, I've been crawling google and Django documentation for over 2 hours now (as well as the IRC channel on freenode), and haven't been able to figure this one out.
Basically, I have a model called Room, which is displayed below:
class Room(models.Model):
"""
A `Partyline` room. Rooms on the `Partyline`s are like mini-chatrooms. Each
room has a variable amount of `Caller`s, and usually a moderator of some
sort. Each `Partyline` has many rooms, and it is common for `Caller`s to
join multiple rooms over the duration of their call.
"""
LIVE = 0
PRIVATE = 1
ONE_ON_ONE = 2
UNCENSORED = 3
BULLETIN_BOARD = 4
CHILL = 5
PHONE_BOOTH = 6
TYPE_CHOICES = (
('LR', 'Live Room'),
('PR', 'Private Room'),
('UR', 'Uncensored Room'),
)
type = models.CharField('Room Type', max_length=2, choices=TYPE_CHOICES)
number = models.IntegerField('Room Number')
partyline = models.ForeignKey(Partyline)
owner = models.ForeignKey(User, blank=True, null=True)
bans = models.ManyToManyField(Caller, blank=True, null=True)
def __unicode__(self):
return "%s - %s %d" % (self.partyline.name, self.type, self.number)
I've also got a forms.py which has the following ModelForm to represent my Room model:
from django.forms import ModelForm
from partyline_portal.rooms.models import Room
class RoomForm(ModelForm):
class Meta:
model = Room
I'm creating a view which allows administrators to edit a given Room object. Here's my view (so far):
def edit_room(request, id=None):
"""
Edit various attributes of a specific `Room`. Room owners do not have
access to this page. They cannot edit the attributes of the `Room`(s) that
they control.
"""
room = get_object_or_404(Room, id=id)
if not room.is_owner(request.user):
return HttpResponseForbidden('Forbidden.')
if is_user_type(request.user, ['admin']):
form_type = RoomForm
elif is_user_type(request.user, ['lm']):
form_type = LineManagerEditRoomForm
elif is_user_type(request.user, ['lo']):
form_type = LineOwnerEditRoomForm
if request.method == 'POST':
form = form_type(request.POST, instance=room)
if form.is_valid():
if 'owner' in form.cleaned_data:
room.owner = form.cleaned_data['owner']
room.save()
else:
defaults = {'type': room.type, 'number': room.number, 'partyline': room.partyline.id}
if room.owner:
defaults['owner'] = room.owner.id
if room.bans:
defaults['bans'] = room.bans.all() ### this does not work properly!
form = form_type(defaults, instance=room)
variables = RequestContext(request, {'form': form, 'room': room})
return render_to_response('portal/rooms/edit.html', variables)
Now, this view works fine when I view the page. It shows all of the form attributes, and all of the default values are filled in (when users do a GET)... EXCEPT for the default values for the ManyToMany field 'bans'.
Basically, if an admins clicks on a Room object to edit, the page they go to will show all of the Rooms default values except for the 'bans'. No matter what I do, I can't find a way to get Django to display the currently 'banned users' for the Room object. Here is the line of code that needs to be changed (from the view):
defaults = {'type': room.type, 'number': room.number, 'partyline': room.partyline.id}
if room.owner:
defaults['owner'] = room.owner.id
if room.bans:
defaults['bans'] = room.bans.all() ### this does not work properly!
There must be some other syntax I have to use to specify the default value for the 'bans' field. I've really been pulling my hair out on this one, and would definitely appreciate some help.
Thanks!
