Upload van mediadataobject via web api odata

Hi, Arjan.

Please post the code for your all the queries and payloads for all the object types (including the container object type), because your current query looks incomplete. MediaDataObject is a regular persistent class with the MediaData property (a byte array). To initialize such reference properties, it is important to first create a MediaDataObject via POST at /odata/MediaDataObject and your JSON payload. Second, you must initialize YourContainerObjectType.YourMediaDataObjectReferenceProperty via POST or PATCH at /odata/YourContainerObjectType(yourEmployeeGuid) and this JSON payload:

JSON
{
 "Photo": {
 "@odata.id": "/odata/MediaDataObject(yourNewMediaDataObjectGuid)"
 }
}

or rather

JSON
"Photo": { "Oid": "yourNewMediaDataObjectGuid" }

You can find examples of working with reference properties here:

• Assign an Object to a Reference Property (if a MediaDataObject object was not initialized yet)
• Modify an Object Assigned to a Reference Property (XPO Only) (after a MediaDataObject object was linked to a main object)

BTW, this procedure will be simplified (1 step instead of 2) in v25.1, where we support Deep Insert.