title: django createview, how to reset the initial value in the form?
body: <p>i am new in django class based view, i am wondering to ask how to reset the initial value in the form when i use createview or detailview?</p>
  
  <p>here is my code:</p>
  
  <pre><code>class DepartFormCreateView(CreateView):
      model = Departs
      fields = ['depth', 'orders', 'lead', 'name','type','Unit','parent']
      template_name = "depart_form_create_view.html"
      form_class = DepartsForm
      success_url = '/'
  
      def get(self, request, *args, **kwargs):   
          self.fields['Unit'].queryset = Units.objects.filter(status = 200, parent__id = 2)
          return super(DepartFormCreateView, self).get(request, *args, **kwargs)
  
      def form_valid(self, form):
          #objects = form.save()
          #self.object = form.save()
          dep = form.save(commit = False)
          dep.addtime = datetime.datetime(1900, 1, 1)
          dep.rights = 200
          dep.status = 100
          dep.save()
          return super(DepartFormCreateView, self).form_valid(form)
  </code></pre>
  
  <p>i got a "list indices must be integers, not str" error, i've checked the source code, the possible method i need to rewrite is get() in ProcessFormView class, where is the mistake? or i rewrite the wrong method? any help will be deeply appreciated.</p>
  
  <p>ps：forms.py</p>
  
  <p>class DepartsForm(ModelForm):</p>
  
  <pre><code>class Meta:
      model = Departs
      fields = ('depth', 'orders', 'lead', 'name','type','Unit','parent's)
  
  def clean(self):
      cleaned_data = super(DepartsForm, self).clean()
      validation code.....
  </code></pre>
  
  <p>models.py</p>
  
  <pre><code>class Departs(models.Model):
      CHOICES_TYPE = (
      (15, 'sales'),
      (55, 'service'),
      (30, 'rd'),
      (81, 'finance'),
      (91, 'header'),
      )
  
      Unit = models.ForeignKey(Units, on_delete = models.PROTECT) 
      name = models.CharField(max_length = 20)
      rights = models.CharField(max_length = 1000, default = '0') 
      assign = models.CharField(max_length = 1000, default = '0') 
      type = models.IntegerField(choices = CHOICES_TYPE) 
      parent = models.ForeignKey('self', related_name = '+', blank = True, null = True, on_delete = models.PROTECT) 
      depth = models.IntegerField(default = 0) 
      orders = models.IntegerField(default = 0) 
      lead = models.CharField(max_length = 100) 
  
      addtime  = models.DateTimeField(auto_now_add = True) 
      adderip  = models.IPAddressField(default = '0.0.0.0') 
      status   = models.IntegerField(choices = utils.CHOICES_STATUS, default = 200) 
  
      class Meta:
      db_table = 'departs'
  </code></pre>
  
  <p>tracetrack:
      TypeError at /sales/receivables/generic_form_create_views/</p>
  
  <pre><code>list indices must be integers, not str
  
  Request Method:     GET
  Request URL:    http://127.0.0.1:8000/sales/receivables/generic_form_create_views/
  Django Version:     1.5.1
  Exception Type:     TypeError
  Exception Value:    
  
  list indices must be integers, not str
  
  Exception Location:     D:/ERP\apps\sales\receivables\views.py in get, line 88
  Python Executable:  D:\Python27\python.exe
  Python Version:     2.7.3
  Python Path:    
  
  ['D:/ERP',
   'D:\\Program Files (x86)\\JetBrains\\PyCharm 3.0\\helpers\\pydev',
   'D:\\Python27\\lib\\site-packages\\setuptools-2.0-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\python_dateutil-2.2-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\six-1.4.1-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\python_memcached-1.53-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\django_ckeditor_updated-4.2.6-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\django_ckeditorfiles-1.1-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\pip-1.5.1-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\jinja2-2.7.2-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\markupsafe-0.18-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\sphinx-1.2.2-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\docutils-0.11-py2.7.egg',
   'D:\\Python27\\lib\\site-packages\\pygments-1.6-py2.7.egg',
   'D:\\erp4\xb1\xb8\xb7\xdd',
   'D:\\ERP',
   'C:\\Windows\\system32\\python27.zip',
   'D:\\Python27\\DLLs',
   'D:\\Python27\\lib',
   'D:\\Python27\\lib\\plat-win',
   'D:\\Python27\\lib\\lib-tk',
   'D:\\Python27',
   'D:\\Python27\\lib\\site-packages',
   'D:\\Python27\\lib\\site-packages\\PIL']
  </code></pre>