def post_item():
if Items.objects.count() < max_items:
root_count = Items.root_count()
if root_count<10:
text = get_text()
item = Items.create(text,text)
elif root_count<10:
item = Items.objects.order_by('?')[0]
else:
item = Items.objects.filter(parent__gte=1)[0]
text = get_text()
item.append(text, text)
