JSON returns 'Null' error... @object.to_json wrong place?

Question

-Update-

found answer here: json, rails, parse error in javascript

also, see iltempo's answer below (thanks iltempo)

JSON / GOOGLE MAPS

PlacesController, index respond_to block

    format.json { render json: @places }

places.js.erb (/assets)

    var markersArray = <%= @places.to_json %>;
    addMarkerArray(markersArray);

    function addMarkerArray(markersArray) {
        for(var i = 0; i < markersArray.length; i++) {
            var lt = markersArray[i].latitude;
            var lg = markersArray[i].longitude;
            ...
            ...
        }
    )

Firebug Error

    TypeError: markersArray is null 
    " for(var i = 0; i < markersArray.length; i++) { "

Brad, thanks for trying to help but finally found stack question that answered it... stackoverflow.com/questions/4485856/… thanks again — econduck
– econduck, Commented Nov 9, 2012 at 8:16

iltempo · Accepted Answer · 2012-11-09 08:06:21Z

0

You are not able to access the ERB template variable @places in a Javascript file placed in assets/. Instead call the function addMarkerArray() with the return value of the AJAX call you do to get the places data.

answered Nov 9, 2012 at 8:06

iltempo

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1 Comment

econduck Over a year ago

Thanks for the response. Finally found a similar stack question here stackoverflow.com/questions/4485856/…

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