registrasion/controllers/invoice.py
def _invoice_matches_cart(self):
        ''' Returns true if there is no cart, or if the revision of this
        invoice matches the current revision of the cart. '''

        self._refresh()

        cart = self.invoice.cart
        if not cart:
            return True

        return cart.revision == self.invoice.cart_revision
def _invoice_matches_cart(self):
        ''' Returns true if there is no cart, or if the revision of this
        invoice matches the current revision of the cart. '''

        self._refresh()

        cart = self.invoice.cart
        if not cart:
            return True

        return cart.revision == self.invoice.cart_revision
Returns true if there is no cart, or if the revision of this
        invoice matches the current revision of the cart.