class categories(models.Model):
    name = models.CharField(max_length=60) #название категории

def categories(request):
    if request.method == 'POST':
        form = categories_putform(request.POST)
        if form.is_valid():
            name = form.cleaned_data['name']
            p = categories(name=name)
            p.save()
            return HttpResponseRedirect('')
    else:
        form = categories_putform()
    cat_list = categories.objects.all()
    return render_to_response('categories.html', {'post': cat_list, 'form': form,}, context_instance=RequestContext(request))

AttributeError at /categories/

'function' object has no attribute 'objects'

Request Method: 	GET
Request URL: 	http://127.0.0.1:8000/categories/
Django Version: 	1.4 pre-alpha SVN-16332
Exception Type: 	AttributeError
Exception Value: 	

'function' object has no attribute 'objects'

Exception Location: 	C:\project\guestbook\website\views.py in categories, line 19
Python Executable: 	C:\Python27\python.exe
Python Version: 	2.7.1
Python Path: 	

['C:\\project\\guestbook',
 'C:\\WINDOWS\\system32\\python27.zip',
 'C:\\Python27\\DLLs',
 'C:\\Python27\\lib',
 'C:\\Python27\\lib\\plat-win',
 'C:\\Python27\\lib\\lib-tk',
 'C:\\Python27',
 'C:\\Python27\\lib\\site-packages']

Server time: 	Чтв, 9 Июн 2011 02:32:45 +0400