$.ajax({
            url: "/api/GuestPartyAPI/" + cerid,
            type: "GETAD",
            async: false,
            data: { Id: id, Name: name, NeedsHotel: needshotel_bool, TableNo: tableno, QR_CodeImage: qrcodeimage,
                AddressLabel: addresslabel, Address_1: address1, Address_2: address2, City: city, State: state,
                PostalCode: postalcode, Country: country, Email: email, Phone: phone
            },
            dataType: "json"
        }).fail(function (jqXHR, textStatus) {
            console.log(jqXHR);
            console.log(textStatus);
            //alert("cerid " + cerid);
            //alert("Request failed: " + textStatus);
        });

[AcceptVerbs("GETAD")]
    public HttpResponseMessage GetGuestPartyCer(int cerid, GuestParty guestparty)
    {

        if (ModelState.IsValid)
        {
            db.GuestParties.AddObject(guestparty);
            db.SaveChanges();

            CeremonyGuestParty ceremonygp = new CeremonyGuestParty(); //create a CeremonyGuestParty entry to link ceremony and guestparty
            ceremonygp.CeremonyId = cerid;
            ceremonygp.GuestPartyId = guestparty.Id;
            db.CeremonyGuestParties.AddObject(ceremonygp);
            db.SaveChanges();

            HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, guestparty);
            response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = guestparty.Id }));
            return response;
        }
        else
        {
            return Request.CreateResponse(HttpStatusCode.BadRequest);
        }
    }

config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

public HttpResponseMessage GetGuestPartyCer(int id, GuestParty guestparty)