Empty discount variables on result page

I've been doing some more testing this morning, and a promotion that offers a discount on the main price, either by percent or fixed price, does display the correct discount on the results page. So it looks like this is just limited to free shipping vouchers.

Sorry Drew, I wasn't clear enough.

(I did try changing the comparison, but that didn't change the behaviour, I'm seeing).

I want to have one check on the results page to display any promotions against the order, whether they are free shipping or against the item price.

total_discounts_with_tax_formatted seemed to be the correct variable to check, and it does work with a promotion against the main price.

It doesn't seem to work with a free shipping promotion though.

In the example above with a free shipping promotion the order* variables for total discounts are populated, but the relevant total_* variables are empty:

orderDiscountsTotal 2.49
orderTaxDiscountsTotal 0.50

[...]

total_discounts 0.00
total_discounts_formatted   £0.00
total_discounts_with_tax    0.00
total_discounts_with_tax_formatted  £0.00

Compared to an order with a promotion applied to the main item price, and both are populated:

orderDiscountsTotal 0.50
orderTaxDiscountsTotal  0.10

[...]

total_discounts 0.50
total_discounts_formatted   £0.50
total_discounts_with_tax    0.60
total_discounts_with_tax_formatted  £0.60

Feels like a bug. Unless I'm missing a difference between free shipping and item discount promotions?

Okay, so on the results page and confirmation email it's best if I stick with the order* variables?

Maybe I'm over-explaining (this heat!)

The behaviour of the total_discounts_* variables differs before and after checkout.

cart_static.html displays totals on the "checkout" page, before checkout:

<h1 class="title">
    <perch:content id="page_title" type="hidden" />
</h1>
<table class="cart">
    <tr>
        <th class="item">Item</th>
        <th class="quantity">Quantity</th>
        <th class="price">Price</th>
        <th class="total">Total</th>
    </tr>
    <perch:cartitems>
        <tr>
            <td>
                <b><perch:cartitem id="title" /></b>
                <p>
                    <perch:cartitem id="variant_desc" />
                </p>
                </p>
            </td>
            <td>
                <perch:cartitem id="quantity" />
            </td>
            <td class="money">
                <perch:cartitem id="price_with_tax" format="$:%.2n" />
            </td>
            <td class="money">
                <perch:cartitem id="total_with_tax" format="$:%.2n" />
            </td>
        </tr>
    </perch:cartitems>

    <perch:if id="shipping_with_tax" match="gt" value="0.00">
        <tr class="total">
            <th colspan="3">
                Shipping
            </th>
            <td class="money">
                <perch:shop id="shipping_with_tax_formatted" />
            </td>
        </tr>
    </perch:if>

    <perch:if id="total_discounts_with_tax" match="gt" value="0.00">
        <tr class="total">
            <th colspan="3">
                Discount (
                <perch:shop id="discount_code" />)
            </th>
            <td class="money">
                - <perch:shop id="total_discounts_with_tax_formatted" />
            </td>
        </tr>
    </perch:if>

    <tr class="total">
        <th colspan="3">
            Grand total
        </th>
        <td class="money">
            <perch:shop id="grand_total_formatted" />
        </td>
    </tr>
</table>

items.html displays the totals on the "order success" page after checkout:

<dl>
    <dt>Order ID</dt>
    <dd><perch:shop id="orderID" /></dd>

    <dt>Date</dt>
    <dd><perch:shop id="orderCreated" type="date" format="d F Y H:i" /></dd>

    <dt>Shipping</dt>
    <dd><perch:shop id="shipping_with_tax_formatted" /></dd>

    <perch:if id="total_discounts_with_tax" match="gt" value="0.00">
    <dt>Discount (<perch:shop id="discount_code" />)</dt>
    <dd>- <perch:shop id="total_discounts_with_tax_formatted" /></dd>
    </perch:if>

    <dt>Total</dt>
    <dd><perch:shop id="grand_total_formatted" /></dd>

    <dt>Status</dt>
    <dd><perch:shop id="orderStatus" format="UC" /></dd>
</dl>

I'm using <perch:shop id="total_discounts_with_tax_formatted" /> in both files.

Using <perch:showall> to list all the variables available with a free shipping promotion, this is what I see (I've cut out lots of variables for brevity):

# These are correct
orderDiscountsTotal 2.49 
orderTaxDiscountsTotal 0.50

[...]
# These are all empty
total_discounts 0.00
total_discounts_formatted   £0.00
total_discounts_with_tax     0.00
total_discounts_with_tax_formatted  £0.00

The total_shipping_discount_* and total_discounts_* values aren't being populated with any values.

My confusion is this:

In the cart, before checkout, I can use total_discounts_with_tax and it will show any discount applied, for both a free shipping promotion, or an item discount promotion.

On the success page, after checkout, total_discounts_with_tax behaviour has changed, and it only has a value if the promotion was an item discount.

Does that make my problem clearer?

Hi, any further thoughts on this?