JavaScript function called from Rails: not loading entire parameter

Question

this is my problem. From rails I call a function:

<body onload="initialize(<%= @segnalazione.id %>,<%= @segnalazione.dove %>); ">

where @segnalazione.dove is like "(lat, lng)".

On the called function, the map is not loaded because half cood is loaded. If I run "alert(coord);" I get only "lng". Why?

function initialize(id,coord) {
        var myOptions = {
            zoom: 11,
            center: coord,mapTypeId:google.maps.MapTypeId.ROADMAP,draggableCursor:'pointer'
            }
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

Jordan Running · Accepted Answer · 2011-06-17 15:17:05Z

1

The first step to debugging a problem like this is to see what the code that Rails is generating looks like, i.e. what HTML/JavaScript is actually being sent to the browser.

In this case I'm guessing the problem is you're not quoting strings. Your first line should probably look like this:

<body onload="initialize(<%= @segnalazione.id %>, '<%= @segnalazione.dove %>'); ">

(Note the new single-quotes around the @segnalazione.dove ERb tag. This is necessary if @segnalazione.dove is a string instead of, say, an integer or other JavaScript literal.

answered Jun 17, 2011 at 15:17

Jordan Running

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Prusse · Accepted Answer · 2011-06-17 15:18:09Z

0

The problem is on <body onload="initialize(<%= @segnalazione.id %>,<%= @segnalazione.dove %>); "> if @segnalazione.dove expands to (lat, lng) the comma operator inside the parentheses will make (lat, lng) evaluate to lng. You can't use "()" how you seen to use it, go for {lat: lat, lng: lng}(as an object) or [lat, lng](as a array).

answered Jun 17, 2011 at 15:18

Prusse

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