How to load Azure Devops Boards data in Power BI?

[yahadi1]

I have been trying to load Board Column data from Azure Devops into Power BI but I am getting the following error when trying to expand the BoardsLocation field:

DataSource.Error: OData: Request failed: The remote server returned an error: (400) Bad Request. (VS403483: The query specified in the URI is not valid: VS403489: The Analytics Service doesn't support key or property navigation like WorkItems(Id) or WorkItem(Id)/AssignedTo. If you getting that error in PowerBI, please, rewrite your query to avoid incorrect folding that causes N+1 problem..)

I am connecting using Odata and this is how I am doing it in a dataflow:

OData.Feed("https://analytics.dev.azure.com/{org}/{project}/_odata/v3.0-preview", null, [Implementation="2.0",OmitValues = ODataOmitValues.Nulls,ODataVersion = 4]) 

The above expands on other fields like WorkItems fine but it is throwing the above error and I cannot understand why.

[Sahir_Maharaj]

It's recommended to rewrite the query to avoid the N+1 problem, which is causing the request to fail. You could try a different approach to retrieve the Board Column data, such as using the Azure DevOps REST API instead of OData.

[Sahir_Maharaj]

Hi @yahadi1,

It seems like the error is related to the query specified in the URI not being valid. The Analytics Service doesn't support key or property navigation like WorkItems(Id) or WorkItem(Id)/AssignedTo, which might be the reason why the BoardsLocation field is not expanding correctly.

[yahadi1]

Hi Sahir,

Thank you for your replies. 

I think the API route will be very difficult to maintian and develop because I am trying to get historical work item revisions of the board columns for a huge amount of data. The API docs show that each API call retrieves the WorkItemRevisions of one WorkItem at a time. 

Why is it that the data can be located in WorkItemRevisions (BoardLocations column), but it cannot be expanded? What is resulting in the N + 1 problem? I have even tried to expand the BoardLocations column for one WorkItem at a time and it still results in the same error.