Problems setting related reference while uploading attachments to Dynamics CRM

Question

I'm having some problems sending my attachment. It looks like this:

{
    "filename": "Test.txt",
    "subject": "Test",
    "mimetype": "text/plain",
    "documentbody": "SABlAGwAbABvACAAVwBvAHIAbABkAA==",
    "objectid@odata.bind": "/accounts(3ba2f6ab-3849-e811-a83b-000d3a2b2acb)",
    "isdocument": true
}

The error I get:

"error": {
    "code": "0x0",
    "message": "An error occurred while validating input parameters: Microsoft.OData.ODataException: An undeclared property 'objectid' which only has property annotations in the payload but no property value was found in the payload. In OData, only declared navigation properties and declared named streams can be represented as properties without values."

This as per documentation found here: https://learn.microsoft.com/en-us/powerapps/developer/common-data-service/webapi/create-entity-web-api#associate-entity-records-on-create

Any clue what is wrong here? Am I defining the relation between the annotation and account wrong?

Answer 1

This works without any issue. objectid_account@odata.bind is absolutely necessary because objectid can store any entity. Read more

var entity = {};
entity.subject = "arun test";
entity["objectid_account@odata.bind"] = "/accounts(4B91608D-3C5A-EA11-A811-000D3A5A1CAC)";
entity.notetext = "blah blah";
entity.filename = "arun.txt";
entity.documentbody = "SABlAGwAbABvACAAVwBvAHIAbABkAA==";
entity.isdocument = true;

Xrm.WebApi.online.createRecord("annotation", entity).then(
    function success(result) {
        var newEntityId = result.id;
    },
    function(error) {
        Xrm.Utility.alertDialog(error.message);
    }
);