I want to make chain select box in my view page. I have country select box, and city select box. And in city domain I have country id. Now I want to show cities of a specific country when I select a country. But I have no idea. I am using grails 2.1.0. I have googled on this and tried some codes. But no result. I am giving my domain, controller and view. How can I make the event onchange, create a list of city with the country_id and show it in the city select box? Can anyone please help me on this please ?
my country domain >>>
package com
class Country {
String name
String abbr
String language
static hasMany = [cities:City]
static constraints = {
}
}
my city domain >>>
package com
class City {
String name
String timezone
static belongsTo = [country:Country]
static constraints = {
}
}
my country controller >>>
package com
import com.City
class CountryController {
def index = { }
}
my view page >>>
<%@ page import="com.Country; com.City" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="layout" content="country" />
</head>
<body>
<form>
<g:select
optionKey="id" optionValue="name" id="countryname" name="countryname" from="${Country.list()}">
</g:select>
<g:select optionKey="id" optionValue="name" id="cityname" name="cityname" from="${City.list()}"></g:select>
</form>
</body>
</html>
