title: User is required error message
body: <p><code>print profile_form.errors</code></p>
  
  <p>Shows:</p>
  
  <p><code>&lt;ul class="errorlist"&gt;&lt;li&gt;user&lt;ul class="errorlist"&gt;&lt;li&gt;This field is required.&lt;/li&gt;&lt;/ul&gt;&lt;/li&gt;&lt;/ul&gt;</code></p>
  
  <p>Code:</p>
  
  <pre><code>def update(request):
      user    = get_object_or_404(User, pk=request.user.id)
      profile = get_object_or_404(UserProfile, user=user)
  
      if request.method == 'POST':
          user_form    = RegistrationForm(request.POST, instance=user)
          profile_form = ProfileForm(request.POST, request.FILES, instance=profile)
  
  ---
  
  class ProfileForm(forms.ModelForm):
      address   = forms.CharField(required=False, max_length=250, widget=forms.Textarea(attrs={'rows': 2}))
  
      class Meta:
          model = UserProfile
  
  ---
  
  class UserProfile(models.Model):
      ...
      country             = models.ForeignKey(Country, default=1)
      city                = models.ForeignKey(City, default=1)
      user                = models.OneToOneField(User)
  </code></pre>
  
  <p>How can I bypass that since the profile is already assigned to the user.</p>