Check out example codes for "modelform prefill with data". It will help you in understanding the concepts better.

Code Example 1

from django.forms.models import model_to_dict

 user = User.objects.get(user_id=usr)  
 if request.method == 'POST':  
     form = TableForm(request.POST)  
     if form.is_valid():  
         #do something  
 else:          
     form = TableForm(initial=model_to_dict(user))  
 return render_to_response('template.html',{'form':form})

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