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JavaScript

Posted by Angel A
Angel A
1,450 Points

"this is undefined" error in JS

Hi, I can't seem to figure out this problem where the below code works when the "for loop" is disabled, and the attributes "locations" and "startAddress" are just simple strings. But if they are not, I am getting a "this is undefined" error when the ajax post request is submitted. Do you have any ideas why would this be?

Thanks!

    // create an event handler for the save route button

    $("#saveRouteButton").click(function(){
        var saveRouteName = $("#saveRouteNameField").val();
        if (!saveRouteName) {
            alert("Please supply a proper name to be submitted to the database");
        } else {
            var routeLength = directionsDisplay.getDirections().routes[0].legs.length;
            var returnRoute = {
                alias: null,
                locations : [], // make this a string - it works!
                startAddresses : [], // make this a string - it works!
            };

            // disable this - it works!
            for (var i = 0; i < routeLength; i++){

                returnRoute.locations[i] = directionsDisplay.getDirections().routes[0].legs[i].start_location
                returnRoute.startAddresses[i] = directionsDisplay.getDirections().routes[0].legs[i].start_address
            };


            route_info = returnRoute;
            route_info.alias = saveRouteName;

            alert(route_info.alias);
            alert(route_info.locations);
            alert($.isPlainObject(route_info))

            $.ajax({
                url: "save_route/", 
                type: "POST",
                data : route_info, 
                success: function(data){
                            if (data != "None") {
                                $("#savedRoutesList").append('<li class="savedRoutesListItem">' 
                                + data + '</li>');
                            }
                            else {alert("You need to enter a route name");}
                        }
                });
        }
        return false;
    });

the error originates from the : google maps main js

  • line 13