Found a node of type 'PrimitiveValue' when starting to read the property value; however, a node of type 'StartObject' was expected. Error while updating SharePoint file name - Power Automate

By Vinod Thachin -

While working with SharePoint Library file name update i got following error,

"status": 400,
  "message": "Found a node of type 'PrimitiveValue' when starting to read the property value; however, a node of type 'StartObject' was expected. The '__metadata' property must have an object value.\r\nclientRequestId: ",
  "source": "",
  "errors": [
    "-1",
    "Microsoft.SharePoint.Client.InvalidClientQueryException"
  ]
}

This error id due to the issue while sending the metadata for the http request. We need to make sure the item body should be send as below.

{

'__metadata':

{'type':'SP.Data.Shared_x0020_DocumentItem'},

'FileLeafRef':<<Filename to be updated>>

}

Here SP.Data.Shared_x0020_DocumentItem is the term of the document library. We can get this checking the api call fo the document library. 

<<SharePoint Site URL>>/_api/lists/GetByTitle('<<Document Library Name>>')/Items(7)


After updating the body, error got resolved. 

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