Extension api breaks when there is no data in sheet, Issue related to DataTableReader

[IamMiruto]

This issue occurs when the extension is trying to get data from the sheet with the new pagination option (dataTableReader) and the sheet is empty. This not only breaks the extension but the tableau extension API itself, so even if I try to load a new extension / restart the current one, the extension API does not respond.

When I tried the same in Tableau online, there was an error message in the console.

However in tableau online the issue gets resolved on reload.

• Tableau version: 2023.1 (Desktop)
• OS: macOS

Steps to reproduce:

https://user-images.githubusercontent.com/96570758/235952145-2a660cd2-e172-4c1f-85b0-5dde87daab46.mov 1: Load and configure the extension with paginated data fetching (DataTableReader). 2: Apply a filter which removes all data from the datasheet. 3: Reload the extension to trigger data fetching.

What do we expect :

What we expect is an empty object as a return, or an option in the API to query and check if there is any data available in the sheet before fetching the data.

Here is a demo workbook with the above-mentioned issue.

APIIssue.zip

[merlijnbuit]

Any update here please?

This issue is crashing many customer dashboards.

[bcantoni]

Thanks for the report! We've captured this as internal work item W-13472503 and will investigate.

[uidev15]

Any updates on this please?

I recently came across this error

This is the javaScript code

let vizActiveSheet = viz.workbook.activeSheet; if (vizActiveSheet.sheetType === "worksheet") { const dataTableReader = await vizActiveSheet.getSummaryDataReaderAsync(); ---> It breaks from this line when no data in sheet const dataTable = await dataTableReader.getAllPagesAsync(); await dataTableReader.releaseAsync(); }

Tableau version: 2023.1 Desktop & Server

[bcantoni]

Update: We have a team internally working on this issue now, so standby for further updates as we make progress on a fix.

[bcantoni]

Update: this bug has been fixed and it should be included in the next release (date TBD).

[johnnyb25us]

Hello. I see the status of this is still open and 2023.3 was released in October. Does this mean that this fix was not included in 2023.3? Will this definitely be in the first 2024 release? Regards.

[jbrant]

Has a date for the release that includes this bug fix yet been determined yet?

[bcantoni]

Thanks all for your patience on this one. This was fixed in Tableau Server 2023.3 and subsequently in Tableau Cloud as well. The fix was in the Tableau code, not this Extensions API.

[merlijnbuit]

What about backwards compatibility?