Office 365 SharePoint REST with Minimalmetadata.js

news.popular.getPosts = function() {
    var
        p = new $.Deferred(),
        r = {
            url: _spPageContextInfo.webServerRelativeUrl + "/_api/web/lists/getbytitle('Posts')/items?$select=Id,Title,PublishedDate,LikesCount,NumCommentsId,PostCategoryId&$orderby=PublishedDate desc"
                    + getFilter(),
            type: 'GET',
            headers: { ACCEPT: 'application/json;odata=minimalmetadata' }
        };
    $.ajax(r)
        .done(function(response) {
            var data = (response.value || response.d.results || response.d);
            var populardata = [];
            $.each(data, function(i,e) {
                if (e.LikesCount || e.NumCommentsId) {
                    populardata.push(e);
                }
            });
            p.resolve(populardata);
        })
        .fail(function (xhrObj, textStatus, err) {
            var e = JSON.parse(xhrObj.responseText),
                err = e.error || e["odata.error"],
                m = '<div style="color:red;font-size:1.2em;">Exception<br/>&raquo; ' +
                  ((err && err.message && err.message.value) ? err.message.value : (xhrObj.status + ' ' + xhrObj.statusText))
                  +'</div>';
          p.reject({ success: false, error: m, uri: r.url });
        });
    return p.promise();
}