customControllerActions

Custom Controller and Action method

By adding your own controller and action, you can take it away and produce your own JSON - you will notice not as much input is then required, using a selectPrimary with no bindings or secondary domaiuns etc

Choose Europe and France will be the only choice since according to:

controller="MyContinent"
action="selectCountries"

It will only list Countries starting with F

<form method=post action=example5>
<label>Continent:</label>
<g:selectPrimary id="MyContinent2" name="MyContinent2"
    domain="ajaxdependancyselectexample.MyContinent"
    searchField="continentName"
    collectField="id"

    controller="MyContinent"
    action="selectCountries"
    noSelection="['': 'Please choose Continent']" 
    setId="MyCountry121"
    value=""/>
    
 <g:select name="MyCountry" id="MyCountry121"  from="[]" required="required" noSelection="['': 'Please choose Continent']" />

<input type=submit value=go> </form>

Now within our controller:

class MyContinentController {
....

def selectCountries() {
		if (params.id) {
			println params
			String continentName = params.searchField
			Long continentId = params.id as Long
			MyContinent continent = MyContinent.get(continentId)
			
			/* Either this method or below method which is much shorter
			def primarySelectList = []
			MyCountry.findAllByMycontinentAndCountryNameLike(continent, "F%").each {
				def primaryMap = [:]
				primaryMap.put('id', it.id)
				primaryMap.put('name', it.countryName)
				primarySelectList.add(primaryMap)
			}
			render primarySelectList as JSON
			*/
			// Shorter method
			def countries=MyCountry.findAllByMycontinentAndCountryNameLike(continent, "F%")
			def results = countries.collect {[	'id': it.id, 'name': it.countryName ]}.unique()
			render results as JSON
		}
	}