codeigniter フレームワークで ajax の助けを借りて、国と都市をドロップダウンさせています。
以下にデータベースの構造を示します。
国
country_id,country_name
州
country_id,state_id,state_name
街
country_id,state_id,city_id,city_name
ユーザーコントローラー
function country(){
$data['header']='Deal Management';
$data['page'] = 'admin/page/user-view';
$data['Country'] = $this->deal->getCountry();
$this->load->view($this->_admin_container,$data);
}
function get_cities($Country){
$this->load->model('city_model');
header('Content-Type: application/x-json; charset=utf-8');
echo(json_encode($this->cities_model->get_cities($dealCountry)));
}
ユーザー ビュー ビュー
<?php $cities['#'] = 'Please Select'; ?>
<label for="country">Country: </label><?php echo form_dropdown('country_id', $Country, '#', 'id="country"'); ?><br />
<label for="city">City: </label><?php echo form_dropdown('city_id', $cities, '#', 'id="cities"'); ?><br />
取引モジュール country_model
function getCountry(){
$this->db->select("*");
$query=$this->db->get("deal_country");
$countries = array();
if($query->result()){
foreach ($query->result() as $country) {
$countries[$country->country_id] = $country->country_name;
}
return $countries;
}else{
return FALSE;
}
}
city_model モジュール
function get_cities($dealCountry = null){
echo $dealCountry;die;
$this->db->select('city_id, city_name');
if($dealCountry != NULL){
$this->db->where('country_id', $dealCountry);
}
$query = $this->db->get('deal_city');
$cities = array();
if($query->result()){
foreach ($query->result() as $city) {
$cities[$city->id] = $city->city_name;
}
return $cities;
}else{
return FALSE;
}
}
ヘッダー ファイルに ajax スクリプトを含めます。
<script type="text/javascript">// <![CDATA[
$(document).ready(function(){
$('#country').change(function(){ //any select change on the dropdown with id country trigger this code
$("#cities > option").remove(); //first of all clear select items
var country_id = $('#country').val(); // here we are taking country id of the selected one.
$.ajax({
type: "POST",
url: "home/get_cities/"+country_id, //here we are calling our user controller and get_cities method with the country_id
success: function(cities) //we're calling the response json array 'cities'
{
$.each(cities,function(city_id,city) //here we're doing a foeach loop round each city with id as the key and city as the value
{
var opt = $('<option />'); // here we're creating a new select option with for each city
opt.val(id);
opt.text(city);
$('#cities').append(opt); //here we will append these new select options to a dropdown with the id 'cities'
});
}
});
});
});
// ]]>
</script>
コードを作成した後、機能しません。
どんな助けでも大歓迎です!
ありがとう