Question

How can I access fields of classes from a GSP in Grails? For instance, the following:

geocoder.geocode({
      'address': 'london'
   }, 

I need to get the address programmatically after being inserted by the user. Something as the following:

geocoder.geocode({
      'address': ${search.city}
   }, 

where search is the class and city is the field.
Is there a way to do this?
Thanks

UPDATE

I tried this:
In the controller:

def map = {
    def searchInstance = Search.get(1)
    [locationList : Location.list(), search:searchInstance]
}

In the view:

function initialize() {
  var geocoder = new google.maps.Geocoder();
  geocoder.geocode({
      'address': ${search.city}
   }, 
   function(results, status) {
      if(status == google.maps.GeocoderStatus.OK) {

          var myMapOptions = {
                  zoom: 8,
                  center: results[0].geometry.location,
                  mapTypeId: google.maps.MapTypeId.ROADMAP
                };

                map = new google.maps.Map(document.getElementById("map_canvas"),
                    myMapOptions);

                <g:each in="${locationList}" status="i" var="location">     
                var point${location.id} = new google.maps.LatLng(${location.lat}, ${location.lng});
                var myMarkerOptions${location.id} = {
                      position: point${location.id}, 
                      map: map
                     };
                if(map.getCenter().distanceFrom(point${location.id}) < 500000)
                    var marker${location.id} = new google.maps.Marker(myMarkerOptions${location.id});   
            </g:each>

      }
   });

}

I can access from the view the Location list returned by the map closure, but I can not access the search instance.
Any ideas?

Answer 1

if you pass an instance of that class as a model from your controller to your view, you can access the fields just as you normally would.

Controller: searchController {
    def search = {
        def searchInstance = Search.get(1) //assuming this gets the search that you want
        [search:searchInstance] // return searchInstance to the view under the alias search
    }
}

Gsp: search.gsp {
    geocoder.geocode({
      'address': ${search.city}
   },
}