Setting user_id when saving in view - Django - django

Question

I need to set the user that is creating the post in the add view:
#login_required
def add(request):
if request.method == 'POST':
form = BusinessForm(request.POST)
form.user_id = request.user.id
if form.is_valid():
form.save()
return HttpResponseRedirect(reverse('listing.views.detail'), args=(f.id))
else:
form = BusinessForm()
return render_to_response('business/add.html', {'form':form},
context_instance=RequestContext(request))
I assign the user id form.user_id = request.user.id but when saving, it still gives me an error Column user_id cannot be null
Am I doing something wrong? Thanks
EDIT:
I am excluding the user from the form in the model:
class BusinessForm(ModelForm):
class Meta:
model = Business
exclude = ('user',)
Could that be causing the problem?? How can I work around this?
EDIT 2:
Edited my BusinessForm() class as suggested but did not work:
class BusinessForm(ModelForm):
class Meta:
model = Business
exclude = ('user',)
def __init__(self, *args, **kwargs):
self.request = kwargs.pop('request', None)
return super(BusinessForm, self).__init__(*args, **kwargs)
def save(self, *args, **kwargs):
kwargs['commit']=False
obj = super(BusinessForm, self).save(*args, **kwargs)
if self.request:
obj.user = self.request.user
obj.save()
Business model
class Business(models.Model):
name = models.CharField(max_length=200)
user = models.ForeignKey(User, unique=False)
description = models.TextField()
category = models.ForeignKey(Category)
address = models.CharField(max_length=200)
phone_number = models.CharField(max_length=10)
website = models.URLField()
image = models.ImageField(upload_to='business_pictures',blank=True)

Answer 1

You don't have to use init or save overrides for this.
You're just setting an attribute on your form and the form doesn't do anything with it. It doesn't magically behave like a model instance (your form wouldn't have a user_id attribute).
Since your form is a ModelForm, you can simply call save on it with commit=False to get the unsaved instance, set the user, then call save on the instance.
if request.method == 'POST':
form = BusinessForm(request.POST)
if form.is_valid():
business = form.save(commit=False)
business.user = request.user
business.save()

Answer 2

this seems to be exactly what your looking for.