class Foo(models.Model)
field1 = models.IntegerField()
field2 = models.IntegerField()
bar_field = models.ForeignKey("Bar", null=True, blank=True)
In a view, I am given the Foo pk, and from that I need to grab the corresponding Bar
object, edit it, and then save it again. Whats the best way to do this?
def my_view(request, foo_pk)
foo = get_object_or_404(Foo, pk=foo_pk)
bar = foo.bar_field
if not bar:
bar = Bar()
#bar = Bar(foo=foo) # this is normally how I would do it
# if I were using ManyToMany
bar_form = BarForm(instance=bar) #sent off to the view
#[...]
bar_form.save() #if bar_field was null, this won't get connected to Foo when saved
The problem is that when I create the empty instance of Bar, it isn't in any way getting connected to Foo. When I save the bar_form
, it's saving/creating the object, but it's just standing alone. How can I rework this code so that it works when the object already exists, and also when one doesn't exist?