Develop Reference

Can't delete data after 10 entries in AJAX, JQuery and javascript/php

I have 10 rows with data inserted and I'm able to delete any of those, but after I insert from 11th row onwards I can't delete any of the rows after the 10th.
EDIT (I CAN'T DELETE ANYTHING WHEN THE RESPONSIVE FORM IS SHOWING)
$(document).ready(function(){
$('#list').dataTable({
responsive: true
});
$('.delete_piece').click(function(){
_conf("Are you sure to delete this piece?","delete_piece",[$(this).attr('data-id')])
})
})
function delete_piece($id){
start_load()
$.ajax({
url:'ajax.php?action=delete_piece',
method:'POST',
data:{id:$id},
success:function(resp){
if(resp==1){
alert_toast("Data successfully deleted",'success')
setTimeout(function(){
location.reload()
},1500)
}
}
})
}
DELETE FUNCTION AJAX
if($action == "delete_piece"){
$delsete = $crud->delete_piece();
if($delsete)
echo $delsete;
}
DELETE FUNCTION FOR THE ADMIN (ME)
function delete_piece(){
extract($_POST);
$delete = $this->db->query("DELETE FROM mro_inventory where id = ".$id);
if($delete){
return 1;
}
}

Consider the following.
$(function() {
function delete_piece($id) {
start_load()
$.ajax({
url: 'ajax.php?action=delete_piece',
method: 'POST',
data: {
id: $id
},
success: function(resp) {
if (resp == 1) {
alert_toast("Data successfully deleted", 'success')
setTimeout(function() {
location.reload()
}, 1500);
}
}
});
}
$('#list').dataTable({
responsive: true
});
$('tbody').on("click", ".delete_piece", function(e) {
_conf("Are you sure to delete this piece?", "delete_piece", [$(this).attr('data-id')])
});
});
This uses the .on() method to delegate the click event to a class.
Delegated event handlers have the advantage that they can process events from descendant elements that are added to the document at a later time. By picking an element that is guaranteed to be present at the time the delegated event handler is attached, you can use delegated event handlers to avoid the need to frequently attach and remove event handlers.
See more: https://api.jquery.com/on/
It was not clear from your post what the HTML structure looks like; yet, you are using DataTables, so I know there should be a Table Body element that should be present.

this is how I solved the problem!!
$(document).ready(function() {
$('#list').dataTable({
responsive: true
});
$('tbody').on("click", ".delete_piece", function() {
_conf("Are you sure to delete this piece?","delete_piece",[$(this).attr('data-id')])
})
})
function delete_piece($id){
start_load()
$.ajax({
url: 'ajax.php?action=delete_piece',
method: 'POST',
data: {
id:$id
},
success: function(resp) {
if (resp == 1) {
alert_toast("Data successfully deleted",'success')
setTimeout(function() {
location.reload()
}, 1500)
}
}
})
}

jQuery.when() doesn't seem to be waiting

I need to make a server side call when a user does something in the DOM (click a checkbox, select a dropdown, etc. This is the series of events:
User clicks a checkbox (or something)
A spinner fades in and the UI becomes unavailable
The server side call is made, and gets back some JSON
A label in the UI is updated with a value from the JSON
The spinner fades out and the UI becomes available again
The problem I'm having is that 4 and 5 often get reversed, and the spinner fades out sometimes 2 or 3 seconds before the label is updated.
I'm trying to use .when() to make sure this isn't happening, but I don't seem to be doing it right. I've been looking at this thread, and this one, and jquery's own documentation.
Here's where I'm at right now...
function UpdateCampaign() {
$('#overlay').fadeIn();
$.when(SaveCampaign()).done(function () {
$('#overlay').fadeOut();
});
}
function SaveCampaign() {
var formData =
.... // get some data
$.ajax({
url: '/xxxx/xxxx/SaveCampaign',
type: 'GET',
dataType: 'json',
data: { FormData: formData },
success: function (data) {
var obj = $.parseJSON(data);
.... // update a label, set some hidden inputs, etc.
},
error: function (e) {
console.log(e)
}
});
}
Everything works correctly. The server side method is executed, the correct JSON is returned and parsed, and the label is updated as expected.
I just need that dang spinner to wait and fade out until AFTER the label is updated.

The issue is because you're not giving $.when() a promise. In fact you're giving it nullso it executes immediately. You can solve this by returning the promise that $.ajax provides from your SaveCampaign() function like this:
function SaveCampaign() {
var formData = // get some data
return $.ajax({ // < note the 'return' here
url: '/xxxx/xxxx/SaveCampaign',
type: 'GET',
dataType: 'json',
data: { FormData: formData },
success: function (data) {
var obj = $.parseJSON(data);
// update a label, set some hidden inputs, etc.
},
error: function (e) {
console.log(e)
}
});
}

I know its answered by Rory already. But here's mine promise method, it works fine always and instead of using success and error uses done and fail
var jqXhr = $.ajax({
url: "/someurl",
method: "GET",
data: {
a: "a"
});
//Promise method can be used to bind multiple callbacks
if (someConditionIstrue) {
jqXhr
.done(function(data) {
console.log('when condition is true', data);
})
.fail(function(xhr) {
console.log('error callback for true condition', xhr);
});
} else {
jqXhr.done(function(data){
console.log('when condition is false', data);
})
.fail(function(xhr) {
console.log('error callback for false condition', xhr);
});
}
Or if I want a common callback other than conditional ones, can bind directly on jqXhr variable outside the if-else block.
var jqXhr = $.ajax({
url: "/someurl",
method: "GET",
data: {
a: "a"
});
jqXhr
.done(function(data) {
console.log('common callback', data);
})
.fail(function(xhr) {
console.log('error common back', xhr);
});

jquery date picker is not work when i put datepicker on ready after ajax call

I want to know that my jquery-ui datepicker is not working in document.ready after an ajax function call. when I put on ajax complete its work successfully please help what should I do. what's the reason for not working
$("#ScheduledArrivalDate").datepicker({
beforeShow: function () {
setTimeout(function () {
$('.ui-datepicker').css('z-index', 2000);
}, 0);
}
});
function getPage(page) {
$.ajax({
type: "POST",
url: page,
data: $("#frm").serialize(),
xhrFields: {
withCredentials: true
},
success: function (html) {
$('#List').empty();
$('#List').append($.parseHTML(html));
},
error: function () {
alert("error");
},
complete: function () {
alert("complete");
}
});
}

$.document.ready() only initiates after a page is loaded without ajax. When you replace/append html in an ajax call and you have a datefield in the new inserted html, you need to initialise it again (at least for the new inserted html block).
You could do this by calling $.datepicker in your success or complete function, like you already did, or by adding $.document.ajaxEnd() to your javascript file, what is initialized after every end of an ajax event (also on error).
Be aware not do double initiate the datepicker, especially when using ajaxEnd. This could lead to unexpected behaviour.

the code inside $(document).ready() will run only after page loads. While you are dynamically adding datepicker if I am not wrong. So do one thig. Take options in a variable like below:
var options = {
beforeShow: function () {
setTimeout(function () {
$('.ui-datepicker').css('z-index', 2000);
}, 0);
}
}
then:
$(document).ready(function(){
$("#ScheduledArrivalDate").datepicker(options);
});
and in ajax call:
function getPage(page) {
$.ajax({
type: "POST",
url: page,
data: $("#frm").serialize(),
xhrFields: {
withCredentials: true
},
success: function (html) {
$('#List').empty();
$('#List').append($.parseHTML(html));
$('#IdOfnewlyAddedDatePicker').datepicker(options);
},
error: function () {
alert("error");
},
complete: function () {
alert("complete");
}
});
}
Let me know if this not work or you are injecting html other than this.

Submit Ajax Form via php without document.ready

I am submitting a number of forms on my page via php using Ajax. The code works great in forms preloaded with the page. However, I need to submit some dynamic forms that don't load with the page, they are called via other javascript functions.
Please, I need someone to help me review the code for use for forms that don't load with the page. Also the 'failure' condition is not working.
The code is below:
<script type="text/javascript">
feedbar = document.getElementById("feedbar");
jQuery(document).ready(function() {
$('#addressform').on('submit', function (e) {
$.ajax({
type: 'post',
url: 'data/process.php',
data: $('#addressform').serialize(),
success: function () {
feedbar.innerHTML='<div class="text-success">New Addressed Saved Successfully</div>';
},
failure: function () {
feedbar.innerHTML='<div class="text-danger">Error Saving New Address</div>';
}
});
e.preventDefault();
});
});
Thanks.

You need to bind event by existing html (e.g body).
Event handlers are bound only to the currently selected elements; they must exist on the page at the time your code makes the call to .on()
see api: https://api.jquery.com/on/
Try like this:
$("body").on('submit', '#addressform',function (e) {
$.ajax({
type: 'post',
url: 'data/process.php',
data: $('#addressform').serialize(),
success: function () {
feedbar.innerHTML='<div class="text-success">New Addressed Saved Successfully</div>';
},
failure: function () {
feedbar.innerHTML='<div class="text-danger">Error Saving New Address</div>';
}
});
e.preventDefault();
});
});

you can delegate to document:
$(document).on('submit', '#addressform', function (e) {
$.ajax({
type: 'post',
url: 'data/process.php',
data: $(this).serialize(), // <----serialize with "this"
success: function () {
feedbar.innerHTML='<div class="text-success">New Addressed Saved Successfully</div>';
},
error: function () { //<----use error function instead
feedbar.innerHTML='<div class="text-danger">Error Saving New Address</div>';
}
});
e.preventDefault();
});
});
As you have posted this line as below:
I need to submit some dynamic forms that don't load with the page
What i understand with this line is you want a common submit function for all forms which are generated dynamically, then you can do this:
$(document).on('submit', 'form', function (e) {
$.ajax({
type: 'post',
url: 'data/process.php',
data: $(this).serialize(), // <----"this" is current form context
success: function () {
//some stuff
},
error: function () { //<----use error function instead
//some stuff
}
});
e.preventDefault();
});
});
For your last comment:
You can try to get the text in ajax response like this:
success: function (data) {
feedbar.innerHTML='<div class="text-success">'+ data +'</div>';
},
error: function (xhr) { //<----use error function instead
feedbar.innerHTML='<div class="text-danger">' + xhr.responseText + '</div>';
}
if Success:
here in success function you get the response in data which is the arguement in success function, this holds the response which it requested to the serverside.
if Error:
Same way if something goes wrong at the serverside or any kind of execption has been occured then xhr which is the arguement of error function holds the responseText.
And finally i suggest you that you can place your response in feedbar selector using jQuery this way:
var $feedbar = $('#feedbar');
so in success function:
$feedbar.html('<div class="text-success">'+ data +'</div>');
so in error function:
$feedbar.html('<div class="text-success">'+ xhr.responseText +'</div>');

Extending jQuery ajax success globally

I'm trying to create a global handler that gets called before the ajax success callback. I do a lot of ajax calls with my app, and if it is an error I return a specific structure, so I need to something to run before success runs to check the response data to see if it contains an error code bit like 1/0
Sample response
{"code": "0", "message": "your code is broken"}
or
{"code": "1", "data": "return some data"}
I can't find a way to do this in jQuery out of the box, looked at prefilters, ajaxSetup and other available methods, but they don't quite pull it off, the bets I could come up with is hacking the ajax method itself a little bit:
var oFn = $.ajax;
$.ajax = function(options, a, b, c)
{
if(options.success)
{
var oFn2 = options.success;
options.success = function(response)
{
//check the response code and do some processing
ajaxPostProcess(response);
//if no error run the success function otherwise don't bother
if(response.code > 0) oFn2(response);
}
}
oFn(options, a, b, c);
};
I've been using this for a while and it works fine, but was wondering if there is a better way to do it, or something I missed in the jQuery docs.

You can build your own AJAX handler instead of using the default ajax:
var ns = {};
ns.ajax = function(options,callback){
var defaults = { //set the defaults
success: function(data){ //hijack the success handler
if(check(data)){ //checks
callback(data); //if pass, call the callback
}
}
};
$.extend(options,defaults); //merge passed options to defaults
return $.ajax(options); //send request
}
so your call, instead of $.ajax, you now use;
ns.ajax({options},function(data){
//do whatever you want with the success data
});

This solution transparently adds a custom success handler to every $.ajax() call using the duck punching technique
(function() {
var _oldAjax = $.ajax;
$.ajax = function(options) {
$.extend(options, {
success: function() {
// do your stuff
}
});
return _oldAjax(options);
};
})();

Here's a couple suggestions:
var MADE_UP_JSON_RESPONSE = {
code: 1,
message: 'my company still uses IE6'
};
function ajaxHandler(resp) {
if (resp.code == 0) ajaxSuccess(resp);
if (resp.code == 1) ajaxFail(resp);
}
function ajaxSuccess(data) {
console.log(data);
}
function ajaxFail(data) {
alert('fml...' + data.message);
}
$(function() {
//
// setup with ajaxSuccess() and call ajax as usual
//
$(document).ajaxSuccess(function() {
ajaxHandler(MADE_UP_JSON_RESPONSE);
});
$.post('/echo/json/');
// ----------------------------------------------------
// or
// ----------------------------------------------------
//
// declare the handler right in your ajax call
//
$.post('/echo/json/', function() {
ajaxHandler(MADE_UP_JSON_RESPONSE);
});
});​
Working: http://jsfiddle.net/pF5cb/3/

Here is the most basic example:
$.ajaxSetup({
success: function(data){
//default code here
}
});
Feel free to look up the documentation on $.ajaxSetup()

this is your call to ajax method
function getData(newUrl, newData, callBack) {
$.ajax({
type: 'POST',
contentType: "application/json; charset=utf-8",
url: newUrl,
data: newData,
dataType: "json",
ajaxSuccess: function () { alert('ajaxSuccess'); },
success: function (response) {
callBack(true, response);
if (callBack == null || callBack == undefined) {
callBack(false, null);
}
},
error: function () {
callBack(false, null);
}
});
}
and after that callback success or method success
$(document).ajaxStart(function () {
alert('ajax ajaxStart called');
});
$(document).ajaxSuccess(function () {
alert('ajax gvPerson ajaxSuccess called');
});