Coupon code empty after update of sales rule through rest

[websecureNL]

Preconditions (*)

1.Magento ver. 2.4.3

Steps to reproduce (*)

1. Create a new disabled Cart Price Rule through API - endpoint POST: /rest/V1/salesRules/

Sample payload
{"rule":{"name":"This is the coupon name","store_labels":[{"store_id":0,"store_label":"Gift Card $20"}],"website_ids":[1],"customer_group_ids":[0],"from_date":"","to_date":"","uses_per_customer":0,"is_active":false,"stop_rules_processing":true,"is_advanced":true,"simple_action":"cart_fixed","discount_amount":20,"discount_qty":0,"discount_step":0,"apply_to_shipping":false,"is_rss":false,"coupon_type":"SPECIFIC_COUPON","use_auto_generation":false,"uses_per_coupon":0}}

2. Create a new Coupon for newly created sales rule through API - endpoint POST: /rest/V1/coupons/

Sample payload
{"coupon":{"rule_id":insert rule_id,"code":"GC1-FD2SD","usage_limit":0,"usage_per_customer":0,"times_used":0,"is_primary":true,"type":0,"extension_attributes":{}}}

3. Update the status of the Cart Price Rule to enabled through Cart Price Rule through API - endpoint PUT /rest/V1/salesRules/{rule_id}

Sample payload
{"rule":{"name":"New Name","from_date":"2022-01-01","to_date":"2022-10-10","is_active":true}}

Expected result (*)

1. Expected that only updated values would be applied (existing Cart Price Rule got a status change from disabled to enabled with a from_date and to_date) and that the existing coupon code would still be attached.

Actual result (*)

1. After updating the Cart Price Rule the coupon code is removed from the rule.

---

Please provide Severity assessment for the Issue as Reporter. This information will help during Confirmation and Issue triage processes.

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @websecureNL. Thank you for your report.
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[websecureNL]

@magento give me 2.4-develop instance - upcoming 2.4.x release

[magento-deployment-service]

Hi @websecureNL. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @websecureNL, unfortunately there is no ability to deploy Magento instance at the moment. Please try again later.

[websecureNL]

@magento give me 2.4-develop instance - upcoming 2.4.x release

[magento-deployment-service]

Hi @websecureNL. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @websecureNL, unfortunately there is no ability to deploy Magento instance at the moment. Please try again later.

[m2-assistant]

Hi @engcom-November. Thank you for working on this issue.
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[engcom-November]

Verified the issue on Magento 2.4-develop branch and the issue is reproducible:
Created Inactive/disabled cart price rule using POST: /rest/V1/salesRules/
Created Coupon for above rule using /rest/V1/coupons

Updated rule - Active, given from date and to date using PUT : /rest/V1/salesRules/{ruleID}
Sample payload:
{ "rule": { "rule_id": 6, "name": "refredv fewfewf name", "store_labels": [ { "store_id": 0, "store_label": "GiftCarddd $50", "extension_attributes": {} } ], "description": "dscvsdfcvsd", "website_ids": [ 0 ], "customer_group_ids": [ 0 ], "from_date": "2022-01-01", "to_date": "2022-10-01", "uses_per_customer": 0, "is_active": true, "stop_rules_processing": true, "is_advanced": true, "sort_order": 0, "discount_amount": 56, "discount_qty": 8, "discount_step": 0, "apply_to_shipping": true, "times_used": 0, "is_rss": true, "coupon_type": "string", "use_auto_generation": true, "uses_per_coupon": 0, "simple_free_shipping": "string", "extension_attributes": {} } }

Issue: Cart Price rule is updated as expected but coupon code is removed.