TypeError: layer should be provided

Question

I am updating an old demo that used the first versions of Cartodb so that is runs with the latest version of cartodb.js.

I am trying to overlay a set of points on the base map and getting the following error:

TypeError: layer should be provided cartodb.createLayer(b=Object { map_canvas="map_canvas", map="map", user_name="tobagoborn", more...}, d=undefined, e=undefined, f=undefined)cartodb.js (line 23) initialize()lndngsites1.html (line 56) onload(event=load )

Here is my code:

<script type="text/javascript">

function initialize()
{
    var map = new L.Map('map_canvas',
    {
        doubleClickZoom:true,zoomControl:true,scrollWheelZoom: false,touchZoom: false,dragging: true, minZoom: 11, maxZoom: 13
    }).setView(new L.LatLng(11.23,  -60.70), 6);

    var tilesUrl = 'http://tobagoborn.com/tiles/tobagobasemap/{z}/{x}/{y}.png';
    L.tileLayer(tilesUrl, {attribution: "Cartodb", maxZoom: 13}).addTo(map);

    //alert(cartodb.VERSION)

    cartodb_leaflet1 = cartodb.createLayer(
    {
        map_canvas: 'map_canvas',
        map: 'map',
        user_name:"tobagoborn",
        type: cartodb,
        sublayers: [{
            table_name: 'lsites',
            query: "SELECT * FROM {{table_name}}",
            interactivity: "landing_sites,number_of_boats,top_species,site_code"
        }]
  }).addTo(map_canvas)

}
</script>

Answer 1

I'm not sure how old your previous version was but the syntax looks a little off from what the docs specify. Take a look here;

http://docs.cartodb.com/cartodb-platform/cartodb-js/layer-source-object/#named-maps-layer-source-object-type-namedmap

They have recently updated this section of the documentation after I very recently had queries/complaints. It is still missing some vital information but it is better than it was (for example they don't mention including an empty layer if you are not using their base map, and we found it necessary to avoid issues with infowindows).

You want something likes this;

cartodb_leaflet1 = cartodb.createLayer(map, 
{
    user_name:"tobagoborn",
    type: 'cartodb',
    sublayers: [
      {
        sql: "SELECT * FROM lsites",
        cartocss: '#lsites {marker-fill: #FF0000;}',
        interactivity['landing_sites','number_of_boats','top_species', 'site_code']
      }]
  })
  .addTo(map)
  .on('done', function(layer) {
      for (var i=0; i < layer.getSubLayerCount(); i++) {
          layer.getSubLayer(i).show();
          layer.getSubLayer(i).setInteraction(true);
      }
  });