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Getting type error while using Ajax call in JavaScript/jQuery [duplicate]

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JavaScript closure inside loops – simple practical example
(44 answers)
Closed 6 years ago.
I am getting the following error while extracting some value inside loop using jQuery. I am showing my error below.
Uncaught TypeError: Cannot read property 'no_of_optional' of undefined
I am providing my code below.
var data = $.param({
'op': 'setPollField',
'sid': id
});
$.ajax({
method: 'POST',
url: "dbcon/DBConnection.php",
data: data
}).done(function(msg) {
var qdata = JSON.parse(msg);
var get = $("#ques").val();
var cntr = 0;
for (var i = 1; i < get; i++) {
if (i != 0) {
$("#questions0").val(qdata[0].questions);
$('#noofoption0').val(qdata[0].no_of_optional);
var data = $.param({
'op': 'getOptional',
'id': qdata[0]['_id']['$id']
});
$.ajax({
method: 'POST',
url: "dbcon/DBConnection.php",
data: data
}).done(function(msg) {
var optdata = JSON.parse(msg);
var cnt = 0;
for (var j = 0; j < qdata[0].no_of_optional; j++) {
}
}
cnt++;
}
})
}
if (i == 1) {
$('#questions' + i).val(qdata[i].questions);
$('#noofoption' + i).val(qdata[i].no_of_optional);
var data = $.param({
'op': 'getOptional',
'id': qdata[i]['_id']['$id']
});
$.ajax({
method: 'POST',
url: "dbcon/DBConnection.php",
data: data
}).done(function(msg) {
var optdata = JSON.parse(msg);
var cnt = 0;
console.log('first question', qdata[i].no_of_optional);
for (var j = 0; j < qdata[i].no_of_optional; j++) {
}
})
}
}
})
I am getting error at this console.log('first question',qdata[i].no_of_optional); .Actually qdata is containing the two set of data(qdata[0],qdata[1]) but inside the second ajax call i is becoming 2.
Here I am expecting qdata[1].no_of_optiona inside second ajax call.

use a closure, by the time the done callback is called the for loop has finished and incremented i:-
var data = $.param({
'op': 'setPollField',
'sid': id
});
$.ajax({
method: 'POST',
url: "dbcon/DBConnection.php",
data: data
}).done(function(msg) {
var qdata = JSON.parse(msg);
var get = $("#ques").val();
var cntr = 0;
for (var i = 1; i < get; i++) {
if (i == 1) {
(function(i) {
$('#questions' + i).val(qdata[i].questions);
$('#noofoption' + i).val(qdata[i].no_of_optional);
var data = $.param({
'op': 'getOptional',
'id': qdata[i]['_id']['$id']
});
$.ajax({
method: 'POST',
url: "dbcon/DBConnection.php",
data: data
}).done(function(msg) {
var optdata = JSON.parse(msg);
var cnt = 0;
console.log('first question', qdata[i].no_of_optional);
for (var j = 0; j < qdata[i].no_of_optional; j++) {
}
})
})(i);
}
}
})

How to pass the select box value as an array using AJAX from one page to another in PHP?

var message = $("#send_message").val();
var Teaminput = $("#sms_reminder_team").val();
for (var i = 0; i <Teaminput.length; i++)
{
var team=Teaminput[i];
}
var Memberinput = $("#sms_reminder_members").val();
for (var i = 0; i <Memberinput.length; i++)
{
var members=Memberinput[i];
}
Get 2 varaibles as array members and team
var parameter = "message="+message+"&team="+team+"&members="+members;
$.ajax({
url: base_url+'ajaxfiles/dir_sendmessage',
type: 'POST',
data: parameter,
success: function(data)
{
document.getElementById('check').innerHTML = data;
}
});
How to send both array variables using AJAX from current page to "dir_sendmessage".

Change the below line
var parameter = "message="+message+"&team="+team+"&members="+members;
to
var parameter = "message="+message+"&team="+JSON.stringify(team)+"&members="+JSON.stringify(members);
Edit: Modify like this too
var team = [];
var members = [];
for (var i = 0; i <Teaminput.length; i++)
{
team=Teaminput[i];
}
var Memberinput = $("#sms_reminder_members").val();
for (var i = 0; i <Memberinput.length; i++)
{
members=Memberinput[i];
}
Note: When you add var in each line in the loop, it will declare a new variable. You have to edit like the above code
After update the code with the JSON.stringify() function, you will be able to get the value as an array in you PHP code
Ajax will not directly pass Jquery array to PHP

First of all ideally you should send in JSON format or use array.tostring() ( can avoid this )
But if you have to send it as array you can try following:
$.ajax({
url: base_url+'ajaxfiles/dir_sendmessage',
type: 'POST',
data: {team:team, members: members},
success: function(data) {
document.getElementById('check').innerHTML = data; } });

var message = $("#send_message").val();
var teaminputt = $("#sms_reminder_team").val();
team = new Array();
members = new Array();
for (var i = 0; i <teaminputt.length; i++)
{
var team=teaminputt[i];
}
var memberinput = $("#sms_reminder_members").val();
for (var i = 0; i <memberinput.length; i++)
{
var members=memberinput[i];
}
var parameter = "message="+message+"&team="+team+"&members="+members;
$.ajax({
url: base_url+'ajaxfiles/dir_sendmessage',
type: 'POST',
data: parameter,
success: function(data)
{
document.getElementById('check').innerHTML = data;
}
});

$("#msg-send-btn").click(function() {
var message = $("#send_message").val();
var optionsmembers = $('#sms_reminder_members option:selected');
var members = $.map(optionsmembers ,function(option) {
return option.value;
});
//---- Using $.map get all selcted data as a an Array.
var postData = {
message,
members
}
//---- For Avoid Json-Stringfy.
$.ajax({
url: base_url+'ajaxfiles/dir_sendmessage.php',
type: 'POST',
data:{myData:postData},
//----- And It's Work Perfectly.

Count how many times i have the same word

My variable tag returns one of these 4 different values: assistance, bug, evolution or maintenance. I would like to count how many times I have each of those words. I would like to display how many times I have each of those item in my console first. I really don't know how to do that. Here is my code :
function displaytickets(y){
$.ajax({
url: "https://cubber.zendesk.com/api/v2/users/" + y + "/tickets/requested.json?per_page=150",
type: 'GET',
dataType: 'json',
cors: true ,
contentType: 'application/json',
secure: true,
beforeSend: function(xhr) {
xhr.setRequestHeader ("Authorization", "Basic " + btoa(""));
},
success: function(data) {
var sortbydate = data.tickets.sort(function(a, b){
return new Date(b.created_at) - new Date(a.created_at);
});
var ids = $.map(data.tickets, function (data) {
return data.id;
})
localStorage.setItem("mesid", ids);
for (i = 0; i < data.tickets.length; i++) {
var myticket = data.tickets[i];
var mydate = data.tickets[i].created_at;
var created = moment(mydate).format("MM-DD-YY");
var mytitle = data.tickets[i].subject;
var description = data.tickets[i].description;
var status = data.tickets[i].status;
var tag = data.tickets[i].tags[0];
console.log(tag);
var myid = data.tickets[i].id;
}
var nbticket = data.tickets.length;
$("#name").append('<h2 class="title">' + " " + nbticket + " ticket(s)" + '</h2>');
},
});
}
Here's what I get from the console for the console.log(tag):

You can achieve this by using an object to store the occurrence count, keyed by the string itself. Try this:
var occurrences = {};
Then in your success handler you can add and increment the tags as you find them:
success: function(data) {
// your code here...
for (i = 0; i < data.tickets.length; i++) {
// your code here...
var tag = data.tickets[i].tags[0];
if (occurrences.hasOwnProperty(tag)) {
occurrences[tag]++;
} else {
occurrences[tag] = 1;
}
}
console.log(occurrences);
},
Working example

Did you try to count it in your for loop ?
var maintenance_counter = 0;
for (i = 0; i < data.tickets.length; i++) {
var myticket = data.tickets[i];
var mydate = data.tickets[i].created_at;
var created = moment(mydate).format("MM-DD-YY");
var mytitle = data.tickets[i].subject;
var description = data.tickets[i].description;
var status = data.tickets[i].status;
var tag = data.tickets[i].tags[0];
var myid = data.tickets[i].id;
if( tag == "maintenance" ){
maintenance_counter++;
}
}
alert("Total maintenance occurrence:"+ maintenance_counter);

Create an object to hold your tag result count, similar to this:
var tagCount = {};
for (i = 0; i < data.tickets.length; i++) {
var tag = data.tickets[i].tags[0];
if (tagCount[tag] === undefined) {
tagCount[tag] = 1;
} else {
tagCount[tag] += 1;
}
}
console.log(tagCount);

getting "undefined" when i print json array with js

I want to parse json array it came down from json.jsp, but when i access parse.js it displays undefined
Here is parse.js
$(document).ready(function() {
$('#login').click(function(event) {
$.get('json.jsp', {
}, function(responseText) {
var myJSONObject1 = responseText;
var myJSONObject = JSON.parse(myJSONObject1);
var len = myJSONObject.length;
var out = "";
for (var i = 0; i < len; i++) {
var student = myJSONObject[i];
out += "<li>"+student.ircEvent + "<li>" + student.method+"<li>"+student.regex;
}
document.getElementById("ajaxResponse").innerHTML = out;
});
});
});
and my json.jsp is,
<%
response.setContentType("plain/text");
User user = new User("RAM","ram#gmail.com");
User user1 = new User("Ravi","ravi#gmail.com");
User user2 = new User("Raghu","raghu#gmail.com");
List list = new ArrayList();
list.add(user);list.add(user1);list.add(user2);
String json = new Gson().toJson(list);
response.getWriter().write(json);
%>
when i access parse.js file, it displays undefined
any ideas......

Just use $.ajax and set the dataType to json. No need to parse anything. jQuery does it for you. http://api.jquery.com/jquery.ajax/
jQuery(document).ready(function($) {
$.ajax({
url: 'json.jsp',
type: 'get',
dataType: 'json',
success: function(data) {
if (data.length) {
var ajaxResponse = document.createElement('table'),
tbody = document.createElement('tbody');
for (var i in data) {
if (data.hasOwnProperty(i)) {
var tr = document.createElement('tr'),
key = document.createElement('td'),
keyText = document.createTextNode(i),
value = document.createElement('td'),
valueText = document.createTextNode(data[i]);
key.appendChild(keyText);
tr.appendChild(key);
value.appendChild(valueText);
tr.appendChild(value);
tbody.appendChild(tr);
}
}
ajaxResponse.appendChild(tbody);
$("#ajaxResponse").append(ajaxResponse);
}
else alert("No data returned!");
}
});
});

rendering list-images bbui from database mysql

I'm trying to make a list bbui image using ajax call in a mysql database, but in the process I do not get the same format as the image of bbui list, following my code
var idmember='glut1';
function dataOnLoad_initialLoad(element) {
var listItem, dataList = element.getElementById('dataList');
$.ajax({
type: "GET",
url: "ajax/history.php?id_member=" + idmember,
dataType: "json",
error: function(xhr, settings, exception) {
alert("error");
},
success: function(data){
$.each(data, function(key, val) {
listItem = document.createElement('div');
listItem.setAttribute('data-bb-type', 'item');
listItem.onclick = function() {
bb.pushScreen('detail.htm', 'detail');
};
listItem.setAttribute('data-bb-title', val.tglorder);
listItem.innerHTML = val.namastatus;
dataList.appendChild(listItem);
var order = val.idorder;
});
}
});
}
and then the code implemented in beforedetail.html like this code
<div id="dataList" data-bb-type="image-list" data-bb-images="none" data-bb-style="arrowlist">
</div>

I had a similar problem but my case was to generate an image list with a header to group items.
I did it the only way i know ho and it worked but am open to suggestions on how to do it better.
Here is the js code:
var listItem, header,
dataList = document.getElementById('dataList');// this is my list already in the DOM
var list = [];
var user = localDB.getScreenName();
$.ajax({
url: reg.api(),
data: {action: 'getAttire', formData: user},
type: 'post',
dataType: 'jsonp',
jsonp: false,
jsonpCallback: 'result',
beforeSend: function() {
document.getElementById('indicator').style.display = 'block';
},
complete: function() {
document.getElementById('indicator').style.display = 'none';
},
success: function(res) {
//showbList();
var title = [];
for (var i = 0; i < res.length; i++) {
if ($.inArray(res[i].item, title) === -1) {
title.push(res[i].item);//creates header array with unique values cos i had headers with duplicate names
}
// This creates header Array from the list
}
for (var k = 0; k < title.length; k++) {
header = document.createElement('div');
header.setAttribute('data-bb-type', 'header');
header.id = 'headers';
header.innerHTML = title[k];
header.style.background = '#f6f6f6';
header.style.fontSize = '20px';
header.style.fontWeight = 'bold';
// header.style.boxShadow = ''
list.push(header);//header created here
for (var i = 0; i < res.length; i++) {
if (header.innerHTML === 'Bag' && res[i].item === 'Bag') {
//var date =
listItem = document.createElement('div');
listItem.setAttribute('data-bb-type', 'item');
listItem.setAttribute('data-bb-img', res[i].img_link);
listItem.setAttribute('data-bb-title', res[i].name);
listItem.setAttribute('data-bb-accent-text', 'Added: '+jQuery.timeago(res[i].date));
listItem.setAttribute('dressup',res[i].DRESS_ID);
listItem.setAttribute('id','wardropeLink');
listItem.innerHTML = "Suited for: " + res[i].suited;
listItem.style.color = "#fff";
listItem.onclick = function() {
var selected = document.getElementById('wardropeLink').getTitle();
console.log(selected); // trying to get d title of a selected or clicked list but it returns the whole group. still working on it
};
list.push(listItem); //list item for a particular header created here
}
if (header.innerHTML === 'Trousers' && res[i].item === 'Trousers') {
listItem = document.createElement('div');
listItem.setAttribute('data-bb-type', 'item');
listItem.setAttribute('data-bb-img', res[i].img_link);
listItem.setAttribute('data-bb-title', res[i].name);
listItem.setAttribute('data-bb-accent-text', jQuery.timeago(res[i].date));
listItem.innerHTML = "Suited for: " + res[i].suited;
listItem.style.color = "#fff";
listItem.onclick = function() {
handleWardrope.listItems(res[i].DRESS_ID);
};
list.push(listItem);
}
}
}
var items = dataList.getItems();
if (items.length > 0) {
//list.insertItemBefore(item, items[0]);
} else {
dataList.refresh(list);//list added to DOM
if (bb.scroller) {
bb.scroller.refresh();
}
}
}
});
return false;
Hope this helps.
Warning and still trying to get the onclick function work for a particular list item but it seems to group them cos of the loop.

concerning the problem i had about getting the title of a list item
i solved it by calling the list selected function and then acted on the getTitle of the selected item.
code
listItem.onclick = function(){
var selected = document.getElementById('dataList').selected;
console.log(selected.getAttribute('dressup'));
}
what i did wrong before was i tried to get d selected item on d item itself and not on the imagelist.