JQGrid with WCF Data Services (OData); loadBeforeSend not called on Edit mode; Cannot do setRequestHeader

Question

I am having a bit of a problem with this fantastic jqgrid plugin and my attempt to use it with WCF Data Services (not really, but the very similar odata4j services). By the

Answer 1

There are no loadBeforeSend parameter which you can set by $.jgrid.edit. The values from $.jgrid.edit defines default options of editGridRow.

To specify the loadBeforeSend callback which should be used during the corresponding Ajax request you should use ajaxEditOptions instead and specify beforeSend (see $.ajax):

$.extend($.jgrid.edit, {
    closeAfterEdit: true,
    closeAfterAdd: true,
    ajaxEditOptions: {
        contentType: "application/json",
        beforeSend: function (jqXHR, settings) {
            jqXHR.setRequestHeader("X-HTTP-Method", "MERGE");
        }
    },
    //mtype: 'POST', - it's already default
    serializeEditData: function (data) {
        delete data.oper;
        return JSON.stringify(data);
    }
});