SharePoint 2013 REST API: Modify File Fields

Question

I am trying to update the fields of a just uploaded SharePoint document.

To upload the file, I POST to the following endpoint:

"_api/web/GetFolderByServerRelativeUrl('/{0}DropOffLibrary')/Files/add(url='{1}',overwrite=true)"

I then GET the file after uploading is complete:

"_api/web/GetFileByServerRelativeUrl('/sites/dodrc/DropOffLibrary/{0}')/ListItemAllFields", fileName

Where I'm struggling is in updating the fields of the uploaded file.

"_api/web/GetFileByServerRelativeUrl('/sites/dodrc/DropOffLibrary/" + fileName + "')"

I have tried to MERGE a slightly modified JSON object, and a SharePoint file model (with updated fields), but I keep receiving bad request (400) error messages.

I have also attempted to Google my question, but I'm not finding much in the way of useful results.

Any help would be much appreciated!

Answer 1

For updating you can do a POST request to /_api/web/GetFileByServerRelativeUrl('fileurl')/ListItemAllFields

The body should be something like

body: { '__metadata': { 'type': 'SP.Data.DocumentsItem' }, 'FieldName': 'FieldValue' }

Along with header X-HTTP-Method: MERGE