Develop Reference

Storing JSON result from ajax request to a javascript variable for Easyautocomplete

I'm trying to implement the EasyAutoComplete plugin on a field based on the value filled in another field, using ajax requests.
I have a customerid field and when it's value changes, I want the productname field to show all products related to that customerid using the EasyAutoComplete plugin.
Here is what I have so far:
$('#customerid').on('change',function() {
var products2 = {
url: function(phrase) {
return "database/FetchCustomerProducts.php";
},
ajaxSettings: {
dataType: "json",
method: "POST",
data: {
dataType: "json"
}
},
preparePostData: function(data) {
data.phrase = $("#customerid").val();
return data;
},
getValue: "name",
list: {
onSelectItemEvent: function() {
var value = $("#productname").getSelectedItemData().id;
$("#productid").val(value).trigger("change");
},
match: {
enabled: true
}
}
};
$("#productname").easyAutocomplete(products2);
});
Contents of FetchCustomerProducts.php:
if(!empty($_POST["customerid"])){
$products = $app['database']->Select('products', 'customerid', $_POST['customerid']);
echo json_encode(['data' => $products]);
}
However it's not working. The code is based on the 'Ajax POST' example found on this page.

you can using element select category add is class "check_catogory"
after using event click element select get value is option, continue send id to ajax and in file php, you can get $_POST['id'] or $_GET['id'], select find database,after echo json_encode
$("#customerid").change(function(){
var id = $(this).val();
if(id!=""){
$.ajax({
url:"database/FetchCustomerProducts.php",
type:"POST",
data:{id:id},
dataType: "json",
cache:false,
success:function(result){
var options = {
data:result,
getValue: "name",
list: {
onSelectItemEvent: function() {
var value = $("#productname").getSelectedItemData().id;
$("#productid").val(value).trigger("change");
},
match: {
enabled: true
}
}
};
$("#productname").easyAutocomplete(options);
}
})
}
});

No data receive in Jquery from php json_encode

I need help for my code as i have been browsing the internet looking for the answer for my problem but still can get the answer that can solve my problem. I am kind of new using AJAX. I want to display data from json_encode in php file to my AJAX so that the AJAX can pass it to the textbox in the HTML.
My problem is Json_encode in php file have data from the query in json format but when i pass it to ajax success, function(users) is empty. Console.log also empty array. I have tried use JSON.parse but still i got something wrong in my code as the users itself is empty. Please any help would be much appreciated. Thank you.
car_detail.js
$(document).ready(function() {
function $_GET(q,s) {
s = (s) ? s : window.location.search;
var re = new RegExp('&'+q+'=([^&]*)','i');
return (s=s.replace(/^\?/,'&').match(re)) ?s=s[1] :s='';
}
var car_rent_id1 = $_GET('car_rent_id');
car_rent_id.value = car_rent_id1;
$.ajax({
type: 'POST',
url: "http://localhost/ProjekCordova/mobile_Rentacar/www/php/car_detail.php",
dataType: "json",
cache: false,
data: { car_rent_id: this.car_rent_id1 },
success: function(users) {
console.log(users);
$('#car_name').val(users.car_name);
}
});
});
car_detail.php
$car_rent_id = $_GET['car_rent_id'];
$query = mysql_query("SELECT c.car_name, c.car_type, c.car_colour,
c.plate_no, c.rate_car_hour, c.rate_car_day, c.car_status,
r.pickup_location
FROM car_rent c
JOIN rental r ON c.car_rent_id=r.car_rent_id
WHERE c.car_rent_id = $car_rent_id");
$users = array();
while($r = mysql_fetch_array($query)){
$user = array(
"car_name" => $r['car_name'],
"car_type" => $r['car_type'],
"car_colour" => $r['car_colour'],
"plate_no" => $r['plate_no'],
"rate_car_hour" => $r['rate_car_hour'],
"rate_car_day" => $r['rate_car_day'],
"car_status" => $r['car_status'],
"pickup_location" => $r['pickup_location']
);
$users[] = $user;
// print_r($r);die;
}
print_r(json_encode($users)); //[{"car_name":"Saga","car_type":"Proton","car_colour":"Merah","plate_no":"WA2920C","rate_car_hour":"8","rate_car_day":"0","car_status":"","pickup_location":""}]
car_detail.html
<label>ID:</label>
<input type="text" name="car_rent_id" id="car_rent_id"><br>
<label>Car Name:</label>
<div class = "input-group input-group-sm">
<span class = "input-group-addon" id="sizing-addon3"></span>
<input type = "text" name="car_name" id="car_name" class = "form-control" placeholder = "Car Name" aria-describedby = "sizing-addon3">
</div></br>
<label>Car Type:</label>
<div class = "input-group input-group-sm">
<span class = "input-group-addon" id="sizing-addon3"></span>
<input type = "text" name="car_type" id="car_type" class = "form-control" placeholder = "Car Type" aria-describedby = "sizing-addon3">
</div></br>

Remove this in this.car_rent_id1 and cache: false this works with HEAD and GET, in your AJAX you are using POST but in your PHP you use $_GET. And car_rent_id is not defined, your function $_GET(q,s) requires two parameters and only one is passed.
$(document).ready(function() {
function $_GET(q,s) {
s = (s) ? s : window.location.search;
var re = new RegExp('&'+q+'=([^&]*)','i');
return (s=s.replace(/^\?/,'&').match(re)) ?s=s[1] :s='';
}
var car_rent_id1 = $_GET('car_rent_id'); // missing parameter
car_rent_id.value = car_rent_id1; // where was this declared?
$.ajax({
type: 'POST',
url: "http://localhost/ProjekCordova/mobile_Rentacar/www/php/car_detail.php",
dataType: "json",
data: { car_rent_id: car_rent_id1 },
success: function(users) {
console.log(users);
$('#car_name').val(users.car_name);
}
});
});
You can also use $.post(), post is just a shorthand for $.ajax()
$(document).ready(function() {
function $_GET(q,s) {
s = (s) ? s : window.location.search;
var re = new RegExp('&'+q+'=([^&]*)','i');
return (s=s.replace(/^\?/,'&').match(re)) ?s=s[1] :s='';
}
var car_rent_id1 = $_GET('car_rent_id');
car_rent_id.value = car_rent_id1;
$.post('http://localhost/ProjekCordova/mobile_Rentacar/www/php/car_detail.php', { car_rent_id: car_rent_id1 }, function (users) {
console.log(users);
$('#car_name').val(users.car_name);
});
});
and in your PHP change
$car_rent_id = $_GET['car_rent_id'];
to
$car_rent_id = $_POST['car_rent_id'];

Here is a code skeleton using .done/.fail/.always
<script
src="https://code.jquery.com/jquery-1.12.4.min.js"
integrity="sha256-ZosEbRLbNQzLpnKIkEdrPv7lOy9C27hHQ+Xp8a4MxAQ="
crossorigin="anonymous"></script>
<script>
$(function(){
$.ajax({
url: 'theurl',
dataType: 'json',
cache: false
}).done(function(data){
console.log(data);
}).fail(function(data){
console.log(data);
}).always(function(data){
console.log(data);
});
});
</script>
I've adapted your code, so you can see the error, replace the ajax call with this one
<script>
$.ajax({
url: "theurl",
dataType: "json",
data: { car_rent_id: car_rent_id1 },
success: function(users) {
console.log(users);
$('#car_name').val(users.car_name);
},
error: function(data) {
console.log(data);
alert("I failed, even though the server is giving a 200 response header, I can't read your json.");
}
});
</script>

A couple of recommendations on this, I would follow jQuery API to try an see where the request is failing http://api.jquery.com/jquery.ajax/. Also, I would access the ids for the input fileds with jQuery. e.g.: $("#theID").val().

Making clickable result list from Bootstrap typeahead and JSON

I want to make the result list for my Bootstrap typeahead list clickable and if the user clicks on any of the items in the dropdown list it will be redirected to the url [on my site, not external links] of the selected item. I made my changes regarding this Stackoverflow topic: jquery autocomplete json and clickable link through
The problem is, that I'm not into JS and Jquery and I can't tell why I get this error (Firefox Firebug Console output). I get this error everytime I enter any letter in my input textbox:
TypeError: it.toLowerCase is not a function bootstrap3-typeahead.min.js (1. line, 3920. column)
I see that the results of my PHP seems okay, so it must be something in the jQuery statement...
This is my result from the PHP:
[{"name":"TEXT-ONE","url":"\/textone-postfix"},{"name":"TEXT-TWO","url":"\/texttwo-postfix"},{"name":"TEXT-THREE"
,"url":"\/textthree-postfix"}]
This is my JQuery code:
$(document).ready(function() {
$(function() {
$('#namesearch').typeahead({
source: function(request, response) {
$.ajax({
url: '/functions/search-autocomplete.php',
type: 'POST',
dataType: 'JSON',
data: 'query=' + request,
success: function(data) {
response($.map(data, function(item) {
return {
url: item.url,
value: item.name
}
}))
}
})
},
select: function( event, ui ) {
window.location.href = ui.item.url;
}
});
});
});
This is my PHP code:
<?php
require_once('../config/config.php');
require_once('../functions/functions.php');
require_once('../config/db_connect.php');
$query = 'SELECT name_desc FROM tbl_name ';
if(isset($_POST['query'])){
$query .= ' WHERE LOWER(name_desc) LIKE LOWER("%'.$_POST['query'].'%")';
}
$return = array();
if($result = mysqli_query($conn, $query)){
// fetch object array
while($row = mysqli_fetch_row($result)) {
$array = array("name" => $row[0], "url" => "/" . normalize_name($row[0])."-some-url-postfix");
$return[] = $array;
}
// free result set
$result->close();
}
// close connection
$conn->close();
$json = json_encode($return);
print_r($json);
?>
Can someone please help me what could be the problem here?
Thank you very much!

The problem was that the displayText wasn't defined:
$(document).ready(function() {
$(function() {
$('#namesearch').typeahead({
source: function(request, response) {
$.ajax({
url: '/functions/search-autocomplete.php',
type: 'POST',
dataType: 'JSON',
data: 'query=' + request,
success: function(data) {
response($.map(data, function(item) {
return {
url: item.url,
value: item.name
}
}))
}
})
},
displayText: function(item) {
return item.value
},
select: function( event, ui ) {
window.location.href = ui.item.url;
}
});
});
});

How to retrieve the elements of a dropdownlist in jquery and send it with ajax to an MVC Controller in ASP.Net?

I have a select item as follows:
<select id="id_category">
<option> </option>
</select>
In run time there is a tree view used to fill up the select menu as follows:
<script>
$(document).ready(function () {
$('#data').jstree({
"plugins": ["checkbox"]
});
$("#data").on("changed.jstree", function (e, data) {
if (data.selected.length) {
$("#id_category").empty();
$(data.selected).each(function (idx) {
var node = data.instance.get_node(data.selected[idx]);
var s = document.getElementById('id_category');
s.options[s.options.length] = new Option(node.text, '1');
});
}
else
$("#id_category").empty();
});
});
</script>
and the html for the tree is not important now as it works well.
Now, I want when a user click on a button with HTML as follows:
<input id="btn3" type="button" value="Test 3" />
an ajax will be run to send all the items in the select to a controller in MVC as follows:
$("#btn3").click(function () {
$.ajax({
url: "/Products/Test03",
datatype: "text",
data: $.map($('#id_category')[0].options, function( elem ) { return (elem.value || elem.text); }),
type: "POST",
success: function (data) {
$('#testarea').html(data);
},
error: function () {
$("#testarea").html("ERROR");
}
});
});
and the controller:
[HttpPost]
public string Test03(Object str1)
{
// call with two parameters and return them back
this.myRetrievedData = str1;
return str1.ToString();
}
The above did not work with me, when I click on Test3 button nothing happened.
I am not sure how to pass the retrieved items to the function in the controller. Could anyone tell me how to do that?

The below logic must work for you. Many thanks to Mr.Stephen Muecke for assistance.
$("#btn3").click(function () {
var optionsData= $.map($('#id_category')[0].options, function(elem) {
return (elem.value || elem.text);
}); // create a variable to hold all the options array.
$.ajax({
url: "/Products/Test03",
datatype: "text",
data: JSON.stringify(optionsData), //pass this variable to post request as 'options'
contentType: "application/json; charset=utf-8",
type: "POST",
success: function (data) {
$('#testarea').html(data);
},
error: function () {
$("#testarea").html("ERROR");
}
});
});
Then you can have your controller as below.
[HttpPost]
public string Test03(IEnumerable<string> options ) // change here to this
{
//your logic goes here
}

I think it's because you have not added [HttpPost] attribute in your controller function

Empty $_POST when posting from jquery.ajax

I am doing some Add, Edit, and Delete for my project in school. The codes in the add module went well, in fact I've added few records. Then, here comes the Edit module, at first it was quite good, similar codes was used from the add module. But as I try and try, the post in the edit module was empty.
here's my edit codes:
$(".careersEdit").click(function () {
var careersTableSelect = encodeURIComponent($("input:radio[name=careersTableSelect]:checked").val());
if (careersTableSelect > 0) {
$(".careersEditForm_load").show();
$(".careersEditForm_error").hide();
$(".careersEditForm").hide();
var dataStringCareersEdit = 'careersTableSelect=' + careersTableSelect;
$.ajax({
type: "POST",
url: "admin/careers/process/careersEditGet.php",
data: dataStringCareersEdit,
beforeSend: function(){
alert(dataStringCareersEdit);
},
success: function () {
setTimeout("", 5000);
fetchResult();
},
error: function () {
alert("Post Error");
}
});
function fetchResult() {
$.ajax({
url: "admin/careers/process/careersEditGet.php",
type: "POST",
dataType: "json",
success: function (result) {
if (result) {
$("input#careersEditPosition").val(result['position']);
$("input#careersEditCompany").val(result['company']);
$("input#careersEditLocation").val(result['location']);
$(".careersEditForm_load").hide();
$(".careersEditForm").show();
}
},
error: function () {
alert("Fetch Error");
}
});
}
} else {
$(".careersEditForm").hide();
$(".careersEditForm_load").hide();
$(".careersEditForm_error").show();
}
});
Here's the careersEditGet.php:
<?php
include('connect.php');
error_reporting(0);
$careersTableSelect = $_POST['careersTableSelect'];
//$careersTableSelect = $careersTableSelect + 1;
//echo $careersTableSelect;
$query = "SELECT * FROM atsdatabase.admincareers WHERE refNum ='" . $careersTableSelect . "' LIMIT 0 , 30";
$runQuery = mysql_query($query);
if (!$runQuery) {
die('Could not enter data: ' . mysql_error());
}
$result = mysql_fetch_row($runQuery);
$array = array(
'position' => "" . $result[1] . "",
'company' => "" . $result[2] . "",
'location' => "" . $result[3] . "",
);
echo json_encode($array);
mysql_close($connection);
?>
Yes, the code is ugly/wrong/crap, I'm quite new to jquery stuffs, about 3-4 days. To those that will help, please do correct me. I wanna learn this jquery ajax stuff. Gracias

Maybe try passing data in more common way:
change
data: dataStringCareersEdit,
to
data: { "careersTableSelect" : careersTableSelect },

Call your ajax function once like,
$.ajax({
url: "admin/careers/process/careersEditGet.php",
type: "POST",
dataType: "json",
data: {careersTableSelect: careersTableSelect},
success: function (result) {
if (result) {
$("input#careersEditPosition").val(result.position);// json not array
$("input#careersEditCompany").val(result.company);// json not array
$("input#careersEditLocation").val(result.location);// json not array
$(".careersEditForm_load").hide();
$(".careersEditForm").show();
}
},
error: function () {
alert("Fetch Error");
}
});

Thanks guys for all the effort to answer this question, I've consulted to a friend who's a web developer, taught me how to properly use ajax in jquery. ;)

You are doing something fundamentally wrong when u are posting Data from jQuery.Ajax..
The data should be an object and the key should be the name of the server side POST variable which will be used later in the PHP ...
Example :
data : {"server_side_vriable" : "Your_data_to_Post" }
......
var dataStringCareersEdit = 'careersTableSelect=' + careersTableSelect + "&careersTableSelect=" + careersTableSelect;
$.ajax({
type: "POST",
url: "admin/careers/process/careersEditGet.php",
data: {"careersTableSelect" : dataStringCareersEdit},
beforeSend: alert(dataStringCareersEdit),
success: function () {
alert("Fetching Result");
setTimeout("", 3000);
$.ajax({
url: "admin/careers/process/careersEditGet.php",
type: "GET",
dataType: "json",
success: function (result) {
if (result) {
$("input#careersEditPosition").val(result['position']);
$("input#careersEditCompany").val(result['company']);
$("input#careersEditLocation").val(result['location']);
$(".careersEditForm_load").hide();
$(".careersEditForm").show();
}
},
error: function () {
alert("Fetch Error");
}
});
},
error: function () {
alert("Post Error");
}
});