Create attribute option via API for swatch attribute fails

[bartlubbersen]

Preconditions

1. Magento 2.1.8
2. PHP7

Steps to reproduce

1. Create a select attribute
2. Make this attribute use visual or text swatch
3. Try adding attribute options through the API via POST /V1/products/attributes/{attributeCode}/options

Expected result

The attribute options should be added the same as without swatch options selected for attribute.

Actual result

Although the API is not giving any errors and returns true with code 200, the option is not added to the attribute.

Problem

The problem is due to the swatch module plugin EavAttribute, in this plugin the option value is overwritten by optionvisual or optiontext. This is because these are used for the tables in the back-end. However through the API it is only possible to enter a value for option. So the option you entered through the API is replaced by an empty value.

[bartlubbersen]

This issue seems to be the same as #10737

[magento-engcom-team]

@bartlubbersen thank you for your bug report.
We've created internal ticket MAGETWO-75336 to track progress on the issue