Cart rule free shipping on subtotal after discount magento 2

Question

I am working on Magento 2.2.5. I have one cart rule that gives free shipping if the subtotal is equal to or greater then $50.

It is working well, but if the user gets any discount from a coupon or any other discount then it is not working properly as subtotal is not considering discount amount.

If user purchases $55 products then he/she will get the free shipping in the checkout page. But when he uses the coupon that gives 10%($5.5) discount then the amount will be $49.5 then also the free shipping is applying.

So anyway to add this rule on subtotal including discounted amount?

Or do I need to change any code for cart rule?

I read many solutions from the stack and tried but with no luck.

Some of are of Magento 1 but I am using Magento 2.2.5

Answer 1

1. First You need to disable free shipping and enable flat rate.
2. After that, you need to set the catalog price rules for free shipping discount over an order of 50$ or greater(add appropriate condition there). the In above case, your cart price rule(coupon code) and catalog price rule will work parallel.

Hope this helps.

Answer 2

Don't know if your problem is still a thing, but i stumbled upon this a few month ago and found a solution for nearly the same issue, so maybe it helps someone. For me following this tutorial: https://magently.com/blog/magento-2-custom-sales-rule-condition/
and changing the validation function worked. As in the documentation of AbstractModel
(https://www.magentoextensions.org/documentation/class_magento_1_1_quote_1_1_model_1_1_cart_1_1_totals.html)
you can call the getSubtotalWithDiscount() function within the model and validate for being greater than 50.

public function validate(\Magento\Framework\Model\AbstractModel $model)
{
    $price = 0;   
    $price = $model->getSubtotalWithDiscount();

    if($price > 50){
        return true;
    }else{
        return false;
    }
}

Answer 3

Actually the option Subtotal (excl. Tax) seems to be with discount, when having a look at the dropdown I see this:

<option value="Magento\SalesRule\Model\Rule\Condition\Address|base_subtotal_with_discount">Subtotal (Excl. Tax)</option>

So the base_subtotal_with_discount really seems to mean, that functionality is there in the core, but well hidden by bad translation.

EDIT

Actually this does not work :)

Answer 4

After some Extensive research, here is the answer (tested on Magento 1.9.2.3): Modify the following file websitename/app/code/core/Mage/Shipping/Model/Carrier/FreeShipping.php

Change the following line:

if (($request->getFreeShipping()) || ($request->getBaseSubtotalInclTax() >= $this->getConfigData('free_shipping_subtotal'))

Replace it with the following:

if (($request->getFreeShipping()) || ($request->getPackageValueWithDiscount() >= $this->getConfigData('free_shipping_subtotal'))

The $request->getPackageValueWithDiscount() will give you the Grand Total.