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Append data working after trigger at third time?

I want to make a dynamic dropdown using selectpicker bootstrap library, codeigniter 4, and AJAX.
I got a problem when I trigger to select the first dropdown, the second dropdown's option appended at third times select. Here I provide the video :
https://youtu.be/AVUBlhajZ_k
Here is my code:
MODEL :
function barangBySupp($namaSupp)
{
$supp = $namaSupp;
$data = $this->db->query("SELECT * FROM tablebarang WHERE supplier='$supp'");
$result = $data->getResultObject();
return $result;
}
CONTROLLER :
public function post()
{
$request = service('request');
if ($request->isAJAX()) {
$namaSupp = $request->getVar('id');
$data = $this->barangMasukModel->barangBySupp($namaSupp);
echo json_encode($data);
}
}
JAVASCRIPT
$("#selectOptSupp").on('changed.bs.select', function(e, clickedIndex, isSelected, previousValue){
const id = $('#selectOptSupp option:selected').data('nama');
const alamat = $('#selectOptSupp option:selected').data('alamat');
const noTelp = $('#selectOptSupp option:selected').data('notelp');
$('[name=namaSupp]').val(id);
$('[name=alamatSupp]').val(alamat);
$('[name=noTelp]').val(noTelp);
$.ajax({
type: "post",
url: "/BarangMasuk/post",
dataType: "JSON",
data: {
id: id
},
cache: false,
success: function(response) {
$.each(response, function(index, data){
$('#selBarang').append('<option data-nama="'+data['namaBarang']+'" data-harga="'+data['harga']+'" data-unit="'+data['unit']+'" value="'+data['namaBarang']+'" data-tokens="'+data['namaBarang']+'">'+data['namaBarang']+'</option>').selectpicker("refresh");
});
SHORT VIEW CODE :
<select id="selectOptSupp" class="form-control selectpicker" data-live-search="true">
<?php foreach ($supplier as $value) : ?>
<option data-nama="<?= $value['namaSupp']; ?>" data-notelp="<?= $value['noTelpSupp']; ?>" data-alamat="<?= $value['alamatSupp']; ?>" data-tokens="<?= $value['namaSupp'] ?>" name="" value="<?= $value['namaSupp'] ?>"><?= $value['namaSupp'] ?>
</option>
<?php endforeach; ?>
</select>
<select id="selBarang" class="form-control selectpicker" data-live-search="true">
// OPTION DATA SHOULD APPEND HERE WHEN #selectOptSupp fires
</select>

Dynamic drop down using single table in codeIgniter

Table
Here when I select Category 1 from drop down I should get district names which comes under Category 1 and for Category 2 I should get districts of Category 2 and so on....
As of now in my code i'm pulling out all district names from my district table master by using district codes. But I should get district names based on category selection.
View:
<select class="form-control" name="category" id='cat_id'>
<?php
foreach($query1 as $row)
{
echo '<option value="'.$row->category.'">'.$row->category.'</option>';
}
?>
</select>
<select name="placename" id="placename">
<?php
foreach($query2 as $row)
{
echo '<option value="'.$row->district_name.'">'.$row-
>district_name.'</option>';
}
?>
</select>
Model:
function viewcatplace()
{
$this->db->select("district.district_name");
$this->db->from('district');
$this->db->join('jc_place_master', 'district.district_code =
jc_place_master.district');
$query = $this->db->get();
return $query->result();
}
Controller:
public function viewcatplace()
{
$this->load->model('JcMeetingExpense_model');
$data['query1'] = $this->JcMeetingExpense_model->viewcatprice();
$data['query2'] = $this->JcMeetingExpense_model->viewcatplace();
$this->load->view('JcMeetingExpense/place_view',$data);
}

You can use this demo for your solution : https://www.codexworld.com/dynamic-dependent-dropdown-codeigniter-jquery-ajax/

It can be only done by ajax:
In controller:
public function index()
{
$web = array();
$web['title'] = 'Select tool';
$web['content'] = 'web/category_index';
// $web['data'] = $this->Common_model->get_all('category','*','','');
$web['data'] = $this->db->query('SELECT DISTINCT category FROM category')->result();
$this->load->view('web_template', $web);
}
Load the category data in select option:
<select class="form-control" id="select_category">
<option value="" disabled selected>Select category</option>
<?php if (isset($data) && !empty($data)) : ?>
<?php foreach ($data as $key => $value) : ?>
<option value="<?php echo $value->category; ?>"><?php echo $value->category; ?></option>
<?php endforeach; ?>
<?php endif; ?>
</select>
<select class="form-control" id="append_district"></select>
Using jquery change event get the data using ajax call:
<script type="text/javascript">
$(document).on('change',"#select_category",function (e) {
var optVal= $("#select_category option:selected").val();
if (optVal) {
$.ajax({
type: "post",
url: "getCategoryDetails",
cache: false,
data: {'category' : optVal},
success: function(json){
try {
var obj = jQuery.parseJSON(json);
$('#append_district').empty();
var append_data = '';
if (obj.length > 0) {
$.each(obj, function( index, value ) {
append_data += '<option value="'+value.district+'">'+value.district+'</option>'
});
$('#append_district').append(append_data);
}
} catch(e) {
console.log('Exception while request..');
}
},
error: function(){
console.log('Error while request..');
}
});
}
});
</script>
The data can be get by JSON format.In controller add this method:
public function getCategoryDetails() {
$category = $_POST['category'];
$categoryData = $this->db->query('SELECT district FROM category where category="'.$category.'"')->result();
echo json_encode ($categoryData) ;
}

two dropdowns connected using PHP, AJAX, Javascript and postgresql

I have my index.php file which load all the countries correctly as seen in this image:
Also this is what I've seen in the first load:
<div class="content">
<?php
include("config.php");
?>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<select name="country" id="country">
<option value="">Select Country</option>
<?php
$db = pg_connect("$db_host $db_name $db_username $db_password");
$query = "SELECT country FROM countries";
$result = pg_query($query);
if (!$result) {
echo "Problem with query " . $query . "<br/>";
echo pg_last_error();
exit();
}
while($myrow = pg_fetch_assoc($result)) {
printf ("<option value=$myrow[country_id]>$myrow[country]</option>");
}
?>
</select>
<br>
<select name="state" id="state">
<option value="">Select State</option>
</select>
<br>
<select name="city" id="city">
<option value="">Select City</option>
</select>
<script type="text/javascript">
$(document).ready(function(){
$('#country').on('change',function(){
var countryID = $(this).val();
if(countryID){
$.ajax({
type:'POST',
url:'ajaxData.php',
data:'country_id='+countryID,
success:function(html){
$('#state').html(html);
$('#city').html('<option value="">Select state first</option>');
}
});
}else{
$('#state').html('<option value="">Select country first</option>');
$('#city').html('<option value="">Select state first</option>');
}
});
$('#state').on('change',function(){
var stateID = $(this).val();
if(stateID){
$.ajax({
type:'POST',
url:'ajaxData.php',
data:'state_id='+stateID,
success:function(html){
$('#city').html(html);
}
});
}else{
$('#city').html('<option value="">Select state first</option>');
}
});
});
</script>
Then I have the ajaxData.php file as below:
<?php
//Include database configuration file
include("config.php");
if(isset($_POST["country_id"]) && !empty($_POST["country_id"])){
//Get all state data
$query = "SELECT state FROM states WHERE country = ".$_POST['country_id'];
$result = pg_query($query);
if (!$result) {
echo "Problem with query " . $query . "<br/>";
echo pg_last_error();
exit();
}
//Count total number of rows
$get_total_rows = pg_numrows($results);
//Display states list
if($get_total_rows > 0){
echo '<option value="">Select state</option>';
while($myrow = pg_fetch_assoc($result)) {
echo '<option value="'.$myrow['state_id'].'">'.$myrow['state'].'</option>';
}
}else{
echo '<option value="">State not available</option>';
}
}
Once I select the country I see the following:
Since the text in the selectors has changed from "Select a State" to "Select country first", it seams that in my javascript funtion when $('#country').on('change',function() is getting into
else{
$('#state').html('<option value="">Select country first</option>');
$('#city').html('<option value="">Select state first</option>');
Instead of going through:
if(countryID){
$.ajax({
type:'POST',
url:'ajaxData.php',
data:'country_id='+countryID,
success:function(html){
$('#state').html(html);
$('#city').html('<option value="">Select state first</option>');
}
});
There is obviously something that is not working but I'm not able to see what it is.
Any help would be appreciated.

JQuery Dynamic Option Select Issue

This is the continution of this Question
Here is the Code for Dynamic JQuery Option Select Generator.
First i will choose the Country, which i didn't include the code, it will return the CountryID which is passed to the controller, then RegionID, then CityID. IT works well until generating the CityID Option select Menu, while i move to the AreaID it didn't work.
What i am missing and how can i fix that ?
I can't able to generate the Menu after the third Second One.
Here is the HTML :
<div id='result' name="result">
<select id="name">
<option value="" disabled>Please select above</option>
</select>
</div>
<div id='resulta' name="resulta">
<select id="name">
<option value="" disabled>Please select above</option>
</select>
</div>
<div id='resultb' name="resultb">
<select id="name">
<option value="" disabled>Please select above</option>
</select>
Here is my Script :
<script>
var ab = $.noConflict();
ab(document).ready(function() {
ab(document).on("change", "#CountryID", function() {
var CountryID = ab("#CountryID").val();
ab.post("globalregiongenerator", {
CountryID: CountryID
},
function(data) {
ab("#result").html(data);
});
});
});
</script>
<script>
var ac = $.noConflict();
ac(document).ready(function() {
ac(document).on("change", "#RegionName", function() {
var RegionName = ac("#RegionName").val();
ac.post("globalcitygenerator", {
RegionName: RegionName
},
function(data) {
ac("#resulta").html(data);
});
});
});
</script>
<script>
var ad = $.noConflict();
ad(document).ready(function() {
ad(document).on("change", "#CityName", function() {
var CityName = ad("#CityName").val();
ad.post("globalareagenerator", {
CityName: CityName
},
function(data) {
ad("#resultb").html(data);
});
});
});
</script>
And here is the Server Side :
public function globalregiongenerator()
{
$CountryID = Input::get('CountryID');
$result = DB::select("SELECT * FROM region where CountryID =$CountryID");
echo "<select id='RegionName' name='RegionName'> <option value='' id=''>Select the Area</option>";
foreach ($result as $value)
{
echo "<option value=".$value->RegionID.">".$value->RegionName."</option>";
}
echo "</select>";
}
public function globalcitygenerator()
{
$RegionID = Input::get('RegionName');
$result = DB::select("SELECT * FROM city where RegionID =$RegionID");
echo "<select id='CityName' name='CityName'> <option value='' id=''>Select the Area</option>";
foreach ($result as $value)
{
echo "<option value=".$value->CityID.">".$value->CityName."</option>";
}
echo "</select>";
}
public function globalareagenerator()
{
$CityID = Input::get('CityName');
$result = DB::select("SELECT * FROM area where CityID =$CityID");
echo "<select id='CityName' name='CityName'> <option value='' id=''>Select the Area</option>";
foreach ($result as $value)
{
echo "<option value=".$value->CityID.">".$value->CityName."</option>";
}
echo "</select>";
}
Note :
Uncaught TypeError: undefined is not a function
This is the error i got in console

Change
echo "<option value=".$value->CityID.">".$value->CityName."</option>";
to
echo "<option value='".$value->CityID."'>".$value->CityName."</option>";
Same with other echos. You're generating
<option value=united states>United States</option>
but it needs to be
<option value='united states'>United States</option>
Update:
Change them to
echo "<option value=\"".$value->CityID."\">".$value->CityName."</option>";

Values Are Combining

`I have a script that is returning the right values except for one little problem. Lid is returning 892 which is right, However; Cid which should return 16 its returning 89216 a combination of the two. How can I get Cid to just return 16?
$(document).ready(function()
{
$(".Doggie").change(function()
{
var LocationString ='Lid='+ $(this).val();
$.ajax({
type: "POST",
url: "ajax_city.php",
data: LocationString,
cache: false,
success: function (html) {
$(".Kitty").html(html);
}
});
});
$('.Kitty').live("change",function(){
var Lid = $('#Doggie').val(), // This is the value of the id="Doggie" selected option
Cid = $(this).val(); // This is the value of the id="Kitty" selected option
$.ajax({
type: "POST",
url: "ajax_area.php",
data: {"Lid":Lid,"Cid":Cid},
cache: false,
success: function (html) {
$(".Pig").html(html);
}
});
});
});
</script>
</head>
<body>
<div id="frame1">
<label>Place :</label>
<select name="Doggie" class="Doggie" id="Doggie">
<option selected="selected">--Select Place--</option>
<?php
$sql = mysql_query("SELECT tblLocations.RestID as Lid, tblRestaurants.RestName as name
FROM tblRestaurants INNER JOIN tblLocations ON tblRestaurants.RestID = tblLocations.RestID
GROUP BY tblLocations.RestID, tblRestaurants.RestName
ORDER BY tblRestaurants.RestName ASC");
while($row=mysql_fetch_array($sql))
{
echo '<option value="'.$row['Lid'].'">'.$row['name'].'</option>';
} ?>
</select>
<label>City :</label>
<select name="Kitty" class="Kitty" id="Kitty">
<option selected="selected">--Select City--</option>
</select>
<label>Area: :</label>
<select name="Pig" class="Pig" id="Pig">
<option selected="selected">--Select Area--</option>
</select>
</div>
</body>
</html>
ajax_city.php
<?php
require('config.php');
if($_POST['Lid'])
{
$Lid=$_POST['Lid'];
//$Cid=$_POST['Cid'];
$sql=mysql_query("SELECT tblLocations.RestId as Lid, tblLocations.CityID as Cid, tblCities.CityName as name
FROM tblLocations INNER JOIN tblCities ON tblLocations.CityID = tblCities.CityID
WHERE tblLocations.RestID = $Lid
GROUP BY tblLocations.RestID, tblCities.CityName
ORDER BY tblCities.CityName ASC");
echo '<option selected="selected">--Select City--</option>';
while($row=mysql_fetch_array($sql))
{
echo '<option value="'.$row['Lid'].''.$row['Cid'].'">'.$row['name'].'</option>';
}
}
?>
ajax_area.php
<?php
require('config.php');
if($_POST['Lid'])
{
//$Lid=$_POST['Lid'];
$Cid=$_POST['Cid'];
$sql=mysql_query("SELECT tblLocations.RestId as Lid, tblLocations.CityID as Cid, tblAreas.AreaName as name
FROM tblLocations INNER JOIN tblAreas ON tblLocations.AreaID = tblAreas.AreaID
WHERE tblLocations.RestID = $Lid AND tblLocations.CityID = $Cid
GROUP BY tblLocations.RestID, tblAreas.AreaName
ORDER BY tblAreas.AreaName ASC");
echo '<option selected="selected">--Select Area--</option>';
while($row=mysql_fetch_array($sql))
{
echo '<option value="'.$row['Lid'].''.$row['Cid'].'">'.$row['name'].'</option>';
}
}
?>

It was these two lines in the ajax-city.php file.
"SELECT tblLocations.CityId as Cid, tblCities.CityName as name
And
echo '<option value="'.$row['Cid'].'">'.$row['name'].'</option>';