Cart mutations doesn't return fees

[Robak08]

Describe the bug In functions.php i got simple cart discount function using 'woocommerce_before_calculate_totals' hook. It applies negative fee to cart when specific criteria are met within cart.

Querying cart returns those fees when front end cart meets those critiria, but when mutating - ex. adding item which should make such fee occur - doesn't (mutations returns fees: null). Subsequent querying cart properly fetches fees property.

To Reproduce Steps to reproduce the behavior:

1. Add discount function to theme functions.php file. Simplified example -> 20% discount when 4 or more products in cart:

function action_woocommerce_before_calculate_totals( $cart ) {
    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;
    $books_quantity = 0;
    $total_amount = 0;
    foreach ( $cart->get_cart() as $cart_item_key => $cart_item ) {
        $total_amount += $current_price;
        $books_quantity++;
    }
    if ($books_quantity >= 4) {
        $discount =  -0.2 * $total_amount;
        $cart->add_fee( 'Discount', $discount);
    }
}
add_action( 'woocommerce_before_calculate_totals', 'action_woocommerce_before_calculate_totals', 10, 1 );

2. Fill cart with items so fee will be applied

3. Query in Graphiql like:

   query CartQ {
   cart {
   total
   feeTotal
   fees {
     amount
     name
   }
   contents {
     productCount
     nodes {
       key
     }
   }
   }
   }

   

4. mutate cart with either addToCart

   mutation Add {
   addToCart(input: 
   {productId: 1165090, 
     quantity: 1, 
     clientMutationId: ""}) 
   {
   cart {
     total
     feeTotal
     fees {
       amount
       name
     }
     contents {
       productCount
       nodes {
         key
       }
     }
   }
   }
   }

   

or removeItemsFromCart

mutation Remove {
  removeItemsFromCart(input: {keys: "bea28a98ffb4e24bf9e154e4d4d3a8bf", clientMutationId: ""}) {
    cart {
      total
      feeTotal
      fees {
        amount
        name
      }
      contents {
        productCount
        nodes {
          key
        }
      }
    }
  }
}

Expected behavior Mutation response fees array as query.

Additional Info I don't think it has anything to do with used woocommerce hook -> meaning that the fee calculation happens after response of mutation. Mostly because where I have more than enough products in cart with calculated fee and removing item while still maintaining minimal productCount the response still nulls fees array.

Desktop (please complete the following information): OS: Windows 11 Browser MS Edge Version 92 Plugin Versions WooGraphQL Version: 0.10.3 WPGraphQL Version: 1.6.3 WordPress Version: 5.8 WooCommerce Version: 5.5.2

[kidunot89]

@Robak08 Fees in general seem to be broken in WooGraphQL. addFee() may also be effected by this as well🤔.