title: django form error : Caught AttributeError while rendering: 'NoneType' object has no attribute 'label'
body: <p>Model:</p>
  
  <pre><code>class AppUser(models.Model) :
      user = models.ForeignKey(User, unique=True)
      slug = models.SlugField(editable=False, blank=True)
      date_created = models.DateTimeField(editable=False, auto_now_add=True)
      last_updated = models.DateTimeField(editable=False, auto_now=True)
      hobbies = models.CharField(max_length=100, blank=True, null=True)
      education_level = models.CharField(max_length=100, blank=True, null=False)
      identifier = models.CharField(max_length=100, blank=True, null=True, unique=True)
  
  class Student(models.Model):
      appuser = models.ForeignKey(AppUser , unique=True)
      institution = models.ForeignKey(Institution , blank=True, null=False)
      course = models.CharField(max_length=100, blank=True, null=True)
      department = models.ForeignKey(Department, blank=True, null=True)
      institute_email = models.EmailField(blank=True, null=True)
      is_valid = models.BooleanField(default=False)
  </code></pre>
  
  <p>Forms:</p>
  
  <pre><code>class StudentForm(ModelForm):
      institute_id = forms.CharField()
      institution = forms.ModelChoiceField(queryset=Institution.objects.all())
      course = forms.ChoiceField(choices=COURSE_CHOICES)
      education_level = forms.ChoiceField(choices=EDUCATION_LEVELS)
  
      class Meta:
          model = Student
          exclude = ('appuser','department', 'is_valid')
  </code></pre>
  
  <p>Views:</p>
  
  <pre><code>student_formset = inlineformset_factory(AppUser,Student,fields=('institution', \
  'course', 'institute_email', 'identifier', 'education_level'),form=StudentForm)
  
  if request.POST:
      student_form = student_formset(request.POST, instance=user)
      if student_form.is_valid():
  </code></pre>
  
  <p>Template:</p>
  
  <pre><code>&lt;form method='post' action='#student'&gt;
  {{ student_form.management_form }}
  {% for form in student_form.forms %}
      &lt;p&gt;{{ form}}&lt;/p&gt;
  {% endfor %}
   &lt;/form&gt;
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>Caught AttributeError while rendering: 'NoneType' object has no attribute 'label'
  </code></pre>
  
  <p>Request Method:     GET
  Request URL:    <a href="http://127.0.0.1:8000/profiles/add_details/" rel="nofollow">http://127.0.0.1:8000/profiles/add_details/</a>
  Django Version:     1.2.4
  Exception Type:     TemplateSyntaxError
  Exception Value:<br>
  Caught AttributeError while rendering: 'NoneType' object has no attribute 'label'
  .....</p>
  
  <p>Template error
  ....
  Caught AttributeError while rendering: 'NoneType' object has no attribute 'label'</p>
  
  <p><strong>It shows problem in template code..</strong></p>
  
  <p><strong>If in template instead of rendering {{form}} we use {{form.as_p}} then it outputs nothing.</strong></p>
  
  <p>Any ideas on above issue??</p>