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Modify the response


Updated: June 16, 2015

In a JavaScript backend mobile service, server scripts enable you to control what is written to the response. You can modify the results returned by an operation or even generate a different response.

The following script reads data from the database, appends an extra retrievedAt property to each result, and then writes those results to the response.

function read(query, user, request) {
        success: function(results) {
            var now = new Date();
            results.forEach(function(item) {
                item.retrievedAt = now;
            request.respond(); //Writes the response

The following script bypasses calling the execute method when an existing record has the same value. It instead calls the respond method to report a success result. This avoids a duplicate record being inserted.

function insert(item, user, request) {
    var channelTable = tables.getTable('Channel');
        uri: item.uri
        success: insertChannelIfNotFound

    function insertChannelIfNotFound(existingChannels) {
        if (existingChannels.length > 0) {
            request.respond(statusCodes.OK, existingChannels[0]);
        } else {

For more information, see the Mobile Services script reference