For save response when upload file and get presigned url

[vnext-phunx2]

Hi everyone, I have an issue with RsUploader.
I am using FormViewer to display a form, which contains a field of type RsUploader.
When I upload a file, I receive a response from the API presinged url.
How can I get and save this response?

[optimajet]

Hi,

Consider adding an onSuccess handler, for example:

{
  "version": "1",
  "actions": {
    "onSuccess": {
      "body": "    const arguments = e.args\n    const httpRequest = arguments[3]\n    console.info(httpRequest.response)",
      "params": {}
    }
  },
  "form": {
    "key": "Screen",
    "type": "Screen",
    "props": {},
    "children": [
      {
        "key": "rsUploader1",
        "type": "RsUploader",
        "props": {
          "method": {
            "value": "POST"
          },
          "action": {
            "value": "/"
          },
          "removable": {
            "value": true
          }
        },
        "events": {
          "onSuccess": [
            {
              "name": "onSuccess",
              "type": "code"
            }
          ]
        }
      }
    ]
  },
  "localization": {},
  "languages": [
    {
      "code": "en",
      "dialect": "US",
      "name": "English",
      "description": "American English",
      "bidi": "ltr"
    }
  ],
  "defaultLanguage": "en-US"
}

[mkaifkazi]

Hi team,

I’m trying to figure out how to update a form’s state using the onSuccess callback.
Here’s an example of the form state I get:

{
  "rsuploader_1756233015845_xgmhkr": [
    {
      "blobFile": {},
      "name": "File-Requirements.docx",
      "status": "inited",
      "fileKey": "_oqj2hr9cv5"
    }
  ]
}

Now, after a successful API call, I’d like to update this state with extra details coming from the API response (for example, file metadata or an uploaded URL).

Any guidance or examples would be really helpful!

Thanks

[mkaifkazi]

@sergeythrees @vnext-phunx2 Can you help me in this?

[sergeythrees]

Hi, @FIDIFZINATION
here is an example of how to add a url to a row in the final list of files on the form. For clarity, I linked this list to the Repeater where the images are displayed.

form.json

I used this server to test the work:
https://github.com/optimajet/formengine/tree/master/community/examples/file-upload-server

[mkaifkazi]

HI @sergeythrees

---

When I first upload a file, the form state creates the following object:

{
  "rsuploader_1756352711685_ybkv0k": [
    {
      "blobFile": {},
      "name": "Auditorías reguladoras 2025_0.pdf",
      "status": "inited",
      "fileKey": "_idcpzvlm1hg",
      "url": "s3://bucket/form-uploads/user/Auditorías reguladoras 2025_0.pdf"
    }
  ]
}

But when I re-edit the form and upload a second file, the state updates to:

{
  "rsuploader_1756352711685_ybkv0k": [
    {
      "blobFile": {},
      "name": "Auditorías reguladoras 2025_0.pdf",
      "status": "finished",
      "fileKey": "_idcpzvlm1hg",
      "progress": 100
    },
    {
      "blobFile": {},
      "name": "document.-.Core.Metrics.Tracking.-.Soft.Launch.docx",
      "status": "inited",
      "fileKey": "_umwusakhntj",
      "url": "s3://bucket/form-uploads/usser/document.-.Core.Metrics.Tracking.docx"
    }
  ]
}

The problem: the url field from the first file gets removed during the update. This means I lose the original file’s URL whenever the form viewer updates the state with new values.

Ideally, the update should merge new values with the existing object instead of overwriting and removing previously available fields like url.

Any solutions to this?