Magento2.3.1 : Shipping address custom attribute value getting wrong format

Question

Ref url - Shipping address custom attribute value not getting in RateRequest object in Carrier Model in magento2.x

enter image description here Above link in working perfect in magento2.2.x but not in magento2.3.1. I checked magento2.3.1 in they have changed something with custom_attribute code.

the issue is reproduce Step below 1. Add to cart product after going checkout Mobile Type select - Local Estimation shipping rate is - 5 USD and address array passed like

estimate-shipping-methods - 
 address:{
 city: "GA"
 country_id: "US"
 custom_attributes: [0: {attribute_code: "mob_type", value: "Local"}]
 firstname: "Test"
 lastname: "Dev"
 postcode: "30049"
.....

2. Once back to checkout cart page change postcode I am getting an error -

Error occurred during "custom_attributes" processing. A custom attribute is specified with a missing attribute code. Verify the code and try again.

I checked post address in estimate-shipping-methods api and found data like

estimate-shipping-methods - 
 address:{
 city: "GA"
 country_id: "US"
 custom_attributes: [0: {attribute_code: "0", value: {attribute_code: "mob_type", value: "Local"}}]
 firstname: "Test"
 lastname: "Dev"
 postcode: "30049"
 .....

both custom_attributes arrays is different - so i checked core code and found custom_attributes: [0: {attribute_code: "0", value: {attribute_code: "mob_type", value: "Local"}}] is worng. attribute_code: "0" is extra adding so How can i fix this issue anyone have idea?

• Marcelo Rodovalho: Could you find a solution?
• Magento2 Devloper: Yes you can check my profile in answer section.
• Marcelo Rodovalho: I couldn't find it. Can you just give me the link?
• Magento2 Devloper: magento.stackexchange.com/questions/216191/…
• Marcelo Rodovalho: I guess this is not related my friend.

Answer 1

This appears to be a core bug to which I've opened an issue on github https://github.com/magento/magento2/issues/27505.

Currently I am using the following hotfix to allow checkout.

Index: vendor/magento/module-checkout/view/frontend/web/js/model/address-converter.js
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- vendor/magento/module-checkout/view/frontend/web/js/model/address-converter.js (revision 176ba2b75e443afb7f752ee28e7b751afec84bd3)
+++ vendor/magento/module-checkout/view/frontend/web/js/model/address-converter.js (date 1585595509144)
@@ -64,6 +64,15 @@
 addressData['custom_attributes'] = _.map(
 addressData['custom_attributes'],
 function (value, key) {
+
+ var alreadyBeenMapped = value instanceof Object
+ && value.hasOwnProperty('attribute_code')
+ && value.hasOwnProperty('value');
+
+ if (alreadyBeenMapped) {
+ return value;
+ }
+
 return {
 'attribute_code': key,
 'value': value

• Vipin Garg: Magento will never accept own mistakes.