I am attempting a 3 dynamically added (Country-State-City) + 2 hardcoded (Type-Band) multi-select filters in a form. Selected values will query a MySQL db, and the record set will be sent back for visualization on an OpenStreetMap.
Example of what desired: the selection of Austria+Switzerland in "Country" fills in "State" with Tirol+Ticino; after selecting both states, "City" is filled in with Innsbruck+Lugano. Checking additional multiple options in the last 2 filters will complete the set of values to query the db and return data to be displayed on OSM.
Plenty of examples on the web when ONE Country-State-City are selected and my code works fine for this. I couldn't find anything for multi-multiple selections that's why I am asking you for help.
The question is: how to modify my code to let multiple selections work out, as expected from the example above?
I have tried several approaches, and none of them worked out.
I converted name = "country" in name = "country[ ]". This works for posting the values to the php file after clicking "submit" but not to access multiple values in JavaScript/jQuery.
Similarly, I also tried a hardcoded, multi-in-one serialization of var country-state-city (look at noted vars in the code) modifying the PHP accordingly but I cannot extract values from selected checkboxes to push them into an array and prepare the multi-in-one serialization.
Everything you need is provided below:
<!DOCTYPE html>
<html>
<head>
<title><b>HTML</b></title>
<script src = "http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src = "sumo/jquery.sumoselect.min.js"></script>
<link href = "sumo/sumoselect.css" rel="stylesheet" />
<script type = "text/javascript">
function ajaxFunction(choice) {
var httpxml;
try {
// Firefox, Opera 8.0+, Safari
httpxml = new XMLHttpRequest();
} catch (e) {
// Internet Explorer
try {
httpxml = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
httpxml = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
alert("Your browser does not support Ajax! Update it or change browser");
return false;
}
}
}
function stateChanged() { //callback function
if (httpxml.readyState == 4) {
if (httpxml.status == 200) {
var myObject = JSON.parse(httpxml.responseText);
document.getElementById("Json").innerHTML = httpxml.responseText;
if (choice == 's1') {
//Discard old State/Region and City options, then populate them with new options and reload SumoSelect
for (j = document.myForm.state.options.length-1; j >= 0; j--) {
document.myForm.state.remove(j);
document.myForm.city.remove(j);
}
for (i = 0; i < myObject.state.length; i++) {
var newOption = $('<option>');
newOption.attr('value', myObject.state[i]).text(myObject.state[i]);
$('#state').append(newOption);
}
$(function(){
$('#state')[0].sumo.reload();
$('#city')[0].sumo.reload();
});
}
if (choice == 's2') {
//Discard old City options while keeping State/Region, then populate with new Cities and reload SumoSelect
for (j = document.myForm.city.options.length-1; j >= 0; j--) {
document.myForm.city.remove(j);
}
for (i = 0; i < myObject.city.length; i++) {
var newOption = $('<option>');
newOption.attr('value', myObject.city[i]).text(myObject.city[i]);
$('#city').append(newOption);
}
$(function(){
$('#city')[0].sumo.reload();
});
}
} else {
alert ("An error has occurred: " + httpxml.statusText);
}
}
} //end of stateChanged() callback function
//Ajax request
var url = "ajax-dd3ck.php";
var country = myForm.country.value;
//var country = "Italy-RepubblicaSanMarino-Austria";
if (choice != 's1'){
//var state = "Piemonte-Tirol";
var state = myForm.state.value;
var city = myForm.city.value;
} else {
var state = '';
var city = '';
}
url = url + "?country=" + country;
url = url + "&state=" + state;
url = url + "&city=" + city;
url = url + "&id=" + Math.random();
document.getElementById("url").innerHTML = url;
httpxml.open("GET", url, true);
httpxml.onreadystatechange = stateChanged; //callback function
httpxml.send(null);
}
</script>
</head>
<body>
<form name = "myForm" action = "ajax-dd3-details.php" method = "post">
<select id = "country" name = "country[]" style = "width: 160px" multiple = "multiple" onchange = "ajaxFunction('s1');" >
<?php
require "config.php";
$sql = " SELECT DISTINCT Nazione FROM $db.$table ";
foreach ($dbo->query($sql) as $row) {
echo "<option value = " . $row['Nazione'] . ">" . $row['Nazione'] . "</option>";
}
?>
</select>
<script>
$('#country').SumoSelect({
placeholder: 'Select Country',
selectAll: true
});
</script>
<select id = "state" name = "state[]" style = "width: 160px" multiple = "multiple" onchange = "ajaxFunction('s2');" >
</select>
<script>
$("#state").SumoSelect({
placeholder: 'Select State/Region',
selectAll: true
});
</script>
<select id = "city" name = "city[]" style = "width: 160px" multiple = "multiple" onchange = "ajaxFunction('s3');" >
</select>
<script>
$("#city").SumoSelect({
placeholder: 'Select City',
selectAll: true
});
</script>
<select name = "type[]" class = "testselect2" style = "width: 160px" multiple = "multiple" >
<option value="3D">3D</option>
<option value="C4FM">C4FM</option>
<option value="ATV">ATV</option>
<option value="DMR">DMR</option>
<option value="DS">DS</option>
<option value="EL">EL</option>
<option value="FDMA">FDMA</option>
<option value="LN">LN</option>
<option value="Beacon">Beacon</option>
<option value="Analogic">Analogic</option>
</select>
<script>
$('.testselect2').SumoSelect({
placeholder: 'Select Type',
selectAll: true
});
</script>
<select class = "testselect2" style = "width: 160px" name = "band[]" multiple = "multiple" >
<option value="29MHz">29 MHz</option>
<option value="50MHz">50 MHz</option>
<option value="VHF">VHF</option>
<option value="UHF">UHF</option>
<option value="SHF">SHF</option>
</select>
<script>
$('.testselect2').SumoSelect({
placeholder: 'Select Band',
selectAll: true
});
</script>
<input type = "submit" value = "Submit">
</form>
<br><br><br><br><br><br>
<br><br><br><br><br><br>
<br><br><br><br><br><br>
<div id = "url"></div>
<div id = "Json"></div>
</body>
</html>
ajax-dd3ck.php
<?Php
require "config.php";
error_reporting(0);// With this no error reporting will be there
$country = $_GET['country'];
$state1 = $_GET['state'];
$city1 = $_GET['city'];
// Validate the inputs - Checking country variable
if ((strlen($country)) > 0 and (!ctype_alpha($country))) {
echo "Data Error";
exit;
}
// Checking state variable (with space)
if ((strlen($state1)) > 0 and ctype_alpha(str_replace(' ', '', $state1)) === false) {
echo "Data Error";
exit;
}// end of input validation
if (strlen($country) > 0) {
$q_country = "SELECT DISTINCT(Regione) FROM $db.$table WHERE Nazione = '$country'";
}
$sth = $dbo->prepare($q_country);
$sth->execute();
$state = $sth->fetchAll(PDO::FETCH_COLUMN);
$q_state = "SELECT DISTINCT(Provincia) FROM $db.$table WHERE ";
if (strlen($state1) > 0) {
$q_state = $q_state . "Regione = '$state1'";
}
$sth = $dbo->prepare($q_state);
$sth->execute();
$city = $sth->fetchAll(PDO::FETCH_COLUMN);
$main = array('state'=>$state,'city'=>$city,'value'=>array("state1"=>"$state1","city1"=>"$city1"));
echo json_encode($main);
?>
MySQL: Create table
CREATE TABLE IF NOT EXISTS `markers` (
`ID` int(4) NOT NULL AUTO_INCREMENT,
`Ripetitore` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci NOT NULL,
`Frequenza` decimal(14,6) NOT NULL,
`Shift` decimal(14,6) NOT NULL,
`Tono` decimal(10,1) DEFAULT NULL,
`Banda` int(2) DEFAULT NULL,
`ID_Nazione` int(2) NOT NULL DEFAULT '1',
`Nazione` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci NOT NULL DEFAULT 'Italy',
`ID_Regione` int(2) NOT NULL,
`Regione` varchar(25) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci NOT NULL,
`ID_Provincia` int(3) NOT NULL,
`Provincia` varchar(22) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci NOT NULL,
`Localita` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci NOT NULL,
`ID_Tipologia` int(2) NOT NULL,
`Tipologia` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci DEFAULT NULL,
`Identificativo` varchar(20) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci DEFAULT NULL,
`Rete` varchar(34) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci DEFAULT NULL,
`Locator` varchar(6) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci NOT NULL,
`Lat` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci NOT NULL,
`Long` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci NOT NULL,
`Gestore` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_mysql500_ci DEFAULT NULL,
`Data` date NOT NULL DEFAULT '0000-00-00',
PRIMARY KEY (`ID`)
) ENGINE=InnoDB AUTO_INCREMENT=1969 DEFAULT CHARSET=latin1;
MySQL: Insert data
INSERT INTO `markers` (`ID`, `Ripetitore`, `Frequenza`, `Shift`, `Tono`, `Banda`, `ID_Nazione`, `Nazione`, `ID_Regione`, `Regione`, `ID_Provincia`, `Provincia`, `Localita`, `ID_Tipologia`, `Tipologia`, `Identificativo`, `Rete`, `Locator`, `Lat`, `Long`, `Gestore`, `Data`) VALUES
(1, 'RV', '144.850000', '0.000000', '0.0', 15, 1, 'Italy', 0, 'ValleAosta', 102, 'Aosta', 'Aosta', 1, 'C4FM', 'IX1VKK', '', 'JN35PR', '45.73512', '7.30514', 'ix1vkk', '2016-11-29'),
(2, 'R0', '145.600000', '-0.600000', '74.4', 15, 1, 'Italy', 0, 'ValleAosta', 102, 'Aosta', 'Courmayeur (AO)', 16, 'Analogic', '', '', 'JN35LT', '45.8125', '6.958333', 'ari aosta ix1vkk', '2016-11-29'),
(3, 'R6', '145.750000', '-0.600000', '74.4', 15, 1, 'Switzerland', 0, 'Ticino', 102, 'Lugano', 'Lugano', 10, 'EL', '357734', '', 'JN35TS', '45.77513', '7.63412', 'ari aosta ix1vkk', '2016-11-29'),
(4, 'R7', '145.775000', '-0.600000', '0.0', 15, 1, 'Germany', 0, 'FreistaatBayern', 102, 'Munchen', 'Munchen', 4, 'DS', 'IX1VKK', '', 'JN35TS', '45.770833', '7.625', 'ari aosta', '2016-11-29'),
(5, 'RU12', '430.300000', '5.000000', '0.0', 20, 1, 'Slovenia', 0, 'ObalnoKraska', 102, 'Capodistria', 'Capodistria', 3, 'DMR', 'IX1VKK - 222111', 'BrandMeister', 'JN35PR', '45.72917', '7.29167', 'IX1VKK', '2017-01-21'),
(6, 'RU14', '431.950000', '0.000000', '0.0', 20, 1, 'Italy', 0, 'ValleAosta', 102, 'Aosta', 'Aosta (AO)', 1, 'C4FM', 'IX1VKK', '', 'JN35PR', '45.72917', '7.29167', 'IX1VKK - ARI Aosta', '2017-02-24'),
(7, 'RU15', '431.975000', '-1.600000', '74.4', 20, 1, 'Austria', 0, 'Tirol', 102, 'Innsbruck', 'Innsbruck', 16, 'Analogic', '', '', 'JN35PQ', '45.68280', '7.30574', 'IX1VKK - ARI Aosta', '2017-02-24'),
(8, '50 MHz', '50.480000', '0.500000', '123.0', 10, 1, 'RepubblicaSanMarino', 1, 'SanMarino', 60, 'CittaDiSanMarino', 'CittaDiSanMarino', 16, 'Analogic', '', 'Val Dora', 'JN35XM', '45.520833', '7.958333', 'iw1fwu', '2016-11-29'),
(9, 'E', '144.600000', '0.000000', '127.3', 15, 1, 'Italy', 1, 'Piemonte', 63, 'Torino', 'Torino', 10, 'EL', '983646', '', 'JN35TB', '45.0625', '7.625', 'ik1weg', '2016-11-29'),
(10, 'T', '144.625000', '0.000000', '82.5', 15, 1, 'Italy', 1, 'Piemonte', 63, 'Torino', 'Castagneto Po (TO)', 16, 'Analogic', '', 'Chivasso', 'JN35WD', '45.145833', '7.875', 'ari chivasso', '2016-11-29'),
(11, 'E', '144.700000', '0.000000', '114.8', 15, 1, 'Italy', 1, 'Piemonte', 63, 'Torino', 'Sestriere (TO)', 10, 'EL', '229829', 'Val Susa', 'JN34KW', '44.9375', '6.875', 'ik1ybm', '2016-11-29'),
(12, 'RV', '144.987500', '1.000000', '0.0', 15, 1, 'Italy', 1, 'Piemonte', 63, 'Torino', 'Torino (TO)', 4, 'DS', 'IR1CJ', ' ', 'JN35UB', '45.0625', '7.708333', 'IW1GAP', '2017-03-23'),
(13, 'E', '145.225000', '0.000000', '94.8', 15, 1, 'Italy', 1, 'Piemonte', 57, 'Verbania', 'Verbania', 10, 'EL', '573542', '', 'JN45GW', '45.9375', '8.541667', 'iz1uqg iz1ujj iz1xjr', '2016-11-29'),
(14, 'RV', '145.287500', '-0.600000', '82.5', 15, 1, 'Italy', 1, 'Piemonte', 62, 'Asti', 'Montaldo Scarampi (AT) ', 16, 'Analogic', '', '', 'JN44DT', '44.8125', '8.291667', 'iz1jvh', '2016-11-29'),
(15, 'E', '145.325000', '0.000000', '0.0', 15, 1, 'Italy', 1, 'Piemonte', 64, 'Cuneo', 'Cuneo', 10, 'EL', '391101', '', 'JN34SJ', '44.395833', '7.541667', 'sconosciuto', '2016-11-29');
Documentation about SumoSelect can be found HERE with a demo HERE
I have been struggling for days and I cannot see the issue because too much focused on it! Any help/answer/suggestion would be greatly appreciated !
