class User(models.Model):
first_name=models.CharField(max_length=20)
last_name=models.CharField(max_length=20)
username=models.CharField(max_length=25, primary_key=True)
password=models.CharField(max_length=15)
email_id=models.CharField(max_length=30, default='NULL')
profile_pic=models.ImageField(upload_to='profilepics/%Y/%m/%d/',height_field=200,width_field=200,default='')

class ProfilePicForm(forms.ModelForm):
class Meta:
    model=User
    fields=['profile_pic']

def upload(request):
    if request.method == 'POST':
        try:
            pic=ProfilePicForm(request.POST,request.FILES)
            m=User.objects.get(pk=username)
            m.profile_pic=pic.cleaned_data['image']
            m.save()
        except:
            pass