Problems update attribute with rest API

[CodeGlitcher]

Preconditions

1. Install Magento 2.1.0

Steps to reproduce

1. Create a selectable attribute.
   
2. Update the attribute with the rest api

put /rest/V1/products/attributes/{attribute_code}
body:

{
    "attribute":
        {

              "attribute_id": 192,
              "default_frontend_label": "Color2"
        }
}

Expected result

1. The default frontend label is set to Color2

Actual result

1. An new empty option is added to the attribute
   

Sending an empty options array has the same result.

{
    "attribute": {
        "attribute_id": 192,
        "attribute_code": "color",
        "default_frontend_label": "Color2",
        "options": []
    }
}

Another little thing. If you update the attribute labels using frontend_labels:

{
    "attribute": {
        "attribute_id": 192,
        "attribute_code": "color",
                "default_frontend_label": "color",
        "frontend_labels": [
        {
            "store_id": 1,
            "label": "kleur"
        },
        {
            "store_id": 2,
            "label": "test"
        }]
    }
}

the field default_frontend_label is ignored.

[j4hangir]

This might be relevant, but here having the same exact version of Magento, it is impossible to create a new attribute:

post /rest/V1/products/attributes
body:
{ 'attribute': { 'default_frontend_label': 'azmun', 'frontend_labels': [{'store_id': 1, 'label': 'azmun'}], 'is_required ': False, 'frontend_input': 'azmun' } }

While the same exception will be thrown:
Exception: {"message":"%fieldName is a required field.","parameters":{"fieldName":"frontend_label"}}

[SerhiyShkolyarenko]

Hi @RobG66!
Thank you for reporting the issue. I managed to reproduce it on the latest develop branch. default_frontend_label is set properly in my case, but empty value is added on each request.
Also, I reproduced inability to reset options. Our internal issue is MAGETWO-58290.

[SerhiyShkolyarenko]

Hi @j4hangir!
'attribute_code" is required field for any attribute, but I don't see it in your data.
I managed to create new attribute with the following data:
{ "attribute": { "is_visible": true, "extension_attributes": {}, "attribute_code": "azmun", "frontend_input": "text", "entity_type_id": 4, "is_required": false, "options": [ ], "is_user_defined": true, "default_frontend_label": "azmun", "frontend_labels": [ { "store_id": 0, "label": "azmun_front_lagel" } ] } }

[SerhiyShkolyarenko]

@RobG66 we investigated that service(put /rest/V1/products/attributes/{attribute_code}) a bit.
When it works with options, it is oriented on merging new options only, so resetting doesn't work.
For more fine-grained attribute options management please use /V1/products/attributes/:attributeCode/options service.
In the issue MAGETWO-58290 we will fix adding empty value to the options list.

[SerhiyShkolyarenko]

Created a separate issue for default_frontend_label ignoring(MAGETWO-58609).

[SerhiyShkolyarenko]

MAGETWO-58290 is delivered to develop branch

[SerhiyShkolyarenko]

MAGETWO-58609 is delivered to develop branch. Closing the issue. Please feel free to leave comments if the issue is still reproducible for you.

[Ctucker9233]

@SerhiyShkolyarenko Is MAGETWO-58290 going to be included in 2.1.3?

[SerhiyShkolyarenko]

@Ctucker9233 unfortunately, no. Internal issue for backporting to 2.1 is MAGETWO-61922.