Importing: non-default multiple value separator can't be used in custom multiple select attribute

[evs-xsarus]

Preconditions (*)

Magento 2.4-develop

Steps to reproduce (*)

1. Create a custom product attribute with type multi_select.
2. Create a catalog_product.csv that contains product data and at least 1 multiselect attribute with 2 options or set two option values to the product, save and make export
3. Separate options with custom separator, for example, |||
   
4. Go to the Magento admin panel -> System -> Import
5. Set Multiple value separator to |||
   
6. Choose your file and click the Check Data button

Expected result (*)

1. Validation should pass without problems

Actual result (*)

1. Validation fails and tells us we have incorrect values for our multiselect attribute
   

The code on https://github.com/magento/magento2/blob/2.3.1/app/code/Magento/CatalogImportExport/Model/Import/Product/Validator.php#L226

Fails to get the configured multiple value separator and pass it on in function $this->context->parseMultiselectValues.

NB I've actually imported the CSV programmaticaly and set parameter '_import_multiple_value_separator' as data in Magento\ImportExport\Model\ImportFactory->create().

Related tickets:

• CatalogImportExport multiselect values will fail validation with custom multiValueSeperator CatalogImportExport multiselect values will fail validation with custom multiValueSeperator #6984
• Importing: non-default multiple value separator can't be used in additional_images column Importing: non-default multiple value separator can't be used in additional_images column #11026

[m2-assistant]

Hi @evs-xsarus. Thank you for your report.
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[m2-assistant]

Hi @AlexWorking. Thank you for working on this issue.
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[magento-engcom-team]

✅ Confirmed by @AlexWorking
Thank you for verifying the issue. Based on the provided information internal tickets MC-17346, MC-17347 were created

Issue Available: @AlexWorking, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.

[Kipperlenny]

Please don't forget the wrongly closed ticket #8754 with a similar problem (Pipe Seperator)

[VivekShingala]

We are on Magento 2.3.5-p2 and facing the same issue with pipe separator for multi values. Is there any workaround for this issue?

[m2-assistant]

Hi @engcom-Charlie. Thank you for working on this issue.
Looks like this issue is already verified and confirmed. But if you want to validate it one more time, please, go though the following instruction:

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[magento-engcom-team]

✅ Confirmed by @engcom-Charlie
Thank you for verifying the issue. Based on the provided information internal tickets MC-23734 were created

Issue Available: @engcom-Charlie, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.