I am experiecing some issues with AJAX updating the page. The actual data in the database is updated but this is not always reflecting in real time on the web page.
For example, I have the following event:
$("#add_note").click(function(e) {
//e.preventDefault();
$("#add_note_form").validate({
rules: {
contact_note: {
required: true
}
},
submitHandler: function(form) {
contact.modal_update({
'obj' : $('#add_note_form'),
'uri' : '/contact/add_note/'
});
}
});
});
This function when a new note is created calls a callback to validate the form fields first and then if successful calls a callback inside a seperate class to conduct the update. See the modal_update class below:
// Update modal
this.modal_update = function(data)
{//
// Declare a few variables for the data object we've received
obj = data.obj // The form element to serialize
uri = data.uri;
// Get the form ID from the data-target attribute
id = obj.attr('data-target');
// URL to send to
url = this.site_url + uri + id;
// The form object
this.post_data(obj.serialize(),url);
// Hide Modal
obj.closest('.modal').modal('hide');
// Refresh
this.refresh();
}
This then figures out the correct route to ajax and calls a ajax call back inside the same class:
// AJAX post
this.post_data = function(obj,uri)
{
$.ajax({
data: obj,
dataType: 'json',
type: 'post',
url: uri,
headers: { "cache-control": "no-cache" },
cache: false,
success: function (response) {
if (response.success == true)
{
$("#alert_success .msg").html(response.message);
$("#alert_success").fadeIn(200).delay(2000).fadeOut(200);
}
else
{
$("#alert_error .msg").html(response.error);
$("#alert_error").fadeIn(200).delay(2000).fadeOut(200);
console.log(response.error);
}
}
});
}
I am then running another class callback to "refresh" the data in all the elements on the page:
this.refresh = function()
{
// Refresh the ajax requests
this.get_contact_data();
this.get_notes();
this.get_contact_log();
this.get_contact_tasks();
}
This class re loads the functions which run on page load to get the inial data into the tables/fields on the page. See "get_notes" below:
// Get notes
this.get_notes = function()
{
// Get all notes and populate table
var log_uri = this.site_url + "/contact/get_notes/" + this.contact_id;
this.get_data(log_uri,function(data) {
notes = $("#contact_notes ul");
notes.empty("");
// Populate the contact fields, assuming there is a result to play with
if (data != false) {
//alert(JSON.stringify(data));
$("#notes-tab .count").html("(" + data.length + ")");
$.each( data, function( key, value ) {
notes.append("<li class='list-group-item' modal-id='editNoteModal' data-target='" + value.ID + "'><div class='row'><div class='col-lg-3'><i class='fa fa-sticky-note mr-3'></i>" + value.timestamp + "</div><div class='col-lg-7'>" + value.note + "</div><div class='col-lg-2'><a href='#' class='edit mr-3'><i class='fa fa-edit mr-1'></i>Edit</a><a href='#' class='delete'><i class='fa fa-times mr-1'></i>Remove</a></div></div></li>");
});
console.log('Notes loaded');
} else {
notes.append("<li>There are currently no notes for this contact</li>");
}
});
}
Now the problem:
For some reason this does not update consistently in real time. The data is updated fine on the server side but on the client side the update/refresh does not always update. I might add a note and get a correct update response but the refresh method seems to be receiving the old data and always be one note behind. So the next time I add a note, the one I added before then appears and so forth.
Another problem I am experiencing is the methods seem to stack on each event so if I add one note (or one of the other methods) I will see the console say "notes loaded" but on the second note it says "notes loaded" twice, then on the 3rd note added 3 times and so forth.
I am sure there must be something fatal flaw in the design of my code here but I am not experienced enough with javascript/jquery to notice what direction I am going wrong so I can fix it.
I thought that this was an issue with ajax caching and not refreshing the result so I have adjusted the ajax request as cache none and also to send no cache headers. I am running in wamp.
In your case, your refresh code will always run before your data got updated. Because ajax is asynchronous so the code behind and below ajax will always execute nearly the time your ajax running.
At the time you run your post_data function to call the API, the refresh function got run too. So it's done before your data got updated.
You should run refresh function inside ajax callback. For example:
this.post_data = function(obj,uri, callback)
{
$.ajax({
data: obj,
dataType: 'json',
type: 'post',
url: uri,
headers: { "cache-control": "no-cache" },
cache: false,
success: function (response) {
if (response.success == true)
{
$("#alert_success .msg").html(response.message);
$("#alert_success").fadeIn(200).delay(2000).fadeOut(200);
}
else
{
$("#alert_error .msg").html(response.error);
$("#alert_error").fadeIn(200).delay(2000).fadeOut(200);
console.log(response.error);
}
callback();
}
});
}
And in modal_update, you pass refresh function to post_data as a callback:
this.modal_update = function(data)
{//
// Declare a few variables for the data object we've received
obj = data.obj // The form element to serialize
uri = data.uri;
// Get the form ID from the data-target attribute
id = obj.attr('data-target');
// URL to send to
url = this.site_url + uri + id;
// The form object
this.post_data(obj.serialize(),url, this.refresh);
// Hide Modal
obj.closest('.modal').modal('hide');
}
You should read more about asynchronous ajax. You can use other tricky solution is setTimeout to run this.refresh but I do not recommend that because you not sure when the update is done.
Related
I am trying to reload a div with id #todos after the data is saved in the database.
I tried using .load() in $.ajax()
$('.todo--checkbox').change(function () {
let value = $(this).data('value');
$.ajax({
url: `/todo/${value}`,
type: 'PUT',
data: { done: this.checked },
success: function (data) {
if (data.success) {
$('#todos').load(location.href + ' #todos');
}
},
});
});
The problem with this, that it is not reloading the page but it is updating the data in database correctly.
I also tried this
$('.todo--checkbox').change(function () {
let value = $(this).data('value');
$.ajax({
url: `/todo/${value}`,
type: 'PUT',
data: { done: this.checked },
success: $('#todos').load(location.href + ' #todos'),
});
});
In this, it is reloading the page as well as updating the data in the database but the problem is that it only reload and update the data at the first request, and after that I need to reload the whole page to update next data.
I tried to check if I am getting any data or not
$('.todo--checkbox').change(function () {
let value = $(this).data('value');
$.ajax({
url: `/todo/${value}`,
type: 'PUT',
data: { done: this.checked },
success: function (data) {
console.log(data);
},
});
});
It returned nothing, but my data in the mongoDB compass is changing.
I already read this articles so, please don't mark this question as duplicate.
Refresh/reload the content in Div using jquery/ajax
Refresh Part of Page (div)
refresh div with jquery
reload div after ajax request
I suggest you checking requests between your page and the server in the Network tab of browser's Development Console (F12).
Make sure you see PUT request going out to the server to update todo
Make sure that response you receive looks like { success: true } otherwise the following piece of code won't be triggered
if (data.success) {
$('#todos').load(location.href + ' #todos');
}
Make sure you see GET request going out to the server to pull '#todos' asynchronously.
If you don't see request #3 try the following:
replace location.href with window.location.href
try reloading it manually via console (for Chrome, F12 -> Console tab -> paste $('#todos').load(location.href + ' #todos') and hit Enter). That way you are going to skip first ajax request and just will check whether '#todo' section is loadable/reloadable.
I think it’s a cache problem. Try it like this
$('.todo--checkbox').change(function () {
let value = $(this).data('value');
$.ajax({
url: '/todo/${value}?t=202103010001',
type: 'PUT',
data: { done: this.checked },
success: $('#todos').load(location.href + ' #todos'),
});
});
t=202103010001 Set to a random number
I have an application that displays a YouTube video and has a rate button to allow a user to like or unlike the video. On the click event 3 functions are called chained together through the success function of the ajax. The flow is this: ytvRate() -> getRating() -> showRating()
When I log the actions and results the response from getRating() does not have the value that I sent in ytvRate(). If I wait a while and refresh the page, the result of getRating() comes back correct. I call getRating() inside the success function of the ajax in ytvRate(). Doesn't that mean the function should not be called until a success response is received?
Here is an example of my logs:
rating sent: like
call get rating
this is my rating: none
call show rating
As you can see, the rating returned from the API is not correct - it should be the rating I just sent. Upon refresh the same call does return the correct rating... so, is there a delay or something to the data api updating the correct information? How can I get the correct rating on the same button click that sends the request?
Here are the functions (showRating does not seem relevant to the problem. It works fine as long as it gets the correct rating - which it is not.)
function ytvRate(id, rating, event){
event.preventDefault()
var apiKey = 'This is a valid key';
var client_id = 'This is a valid client id';
var redirect_uri = 'This is a redirect uri';
var scope = 'https://www.googleapis.com/auth/youtube';
var rateUrl = 'https://www.googleapis.com/youtube/v3/videos/rate?id='+id+'&key='+apiKey+'&rating='+rating;
if(getHash().access_token){
var token = getHash().access_token;
$.ajax({
type: "POST",
url: rateUrl,
beforeSend: function (request){
request.setRequestHeader('Authorization', 'Bearer ' + token);
},
success: function(data){
console.log('rating sent: '+rating);
getRating(id);
},
error: function(e) {
console.log(e);
}
});
} else{
window.location = 'https://accounts.google.com/o/oauth2/v2/auth?client_id='+client_id+'&redirect_uri='+redirect_uri+'&scope='+scope+'&response_type=token&prompt=consent&include_granted_scopes=false';
}
return false;
}
function getRating(id){
var getRatingUrl = 'https://www.googleapis.com/youtube/v3/videos/getRating?id='+id;
console.log('call get rating');
if(getHash().access_token){
var token = getHash().access_token;
$.ajax({
type: "GET",
url: getRatingUrl,
beforeSend: function (request){
request.setRequestHeader('Authorization', 'Bearer ' + token);
},
success: function(data){
var rating = data.items[0].rating;
console.log("this is my rating: " + rating);
showRating(rating, id);
}
});
}
}
function showRating(response, id){
console.log('call show rating');
numLikes(id);
if(response == 'like'){
document.getElementById("notliked").className = "hide";
document.getElementById("liked").className = "";
document.getElementById("like-btn").style.color = "#87CEFA";
document.getElementById("like-btn").setAttribute("onclick", "ytvRate('"+id+"', 'none', event)");
} else{
document.getElementById("notliked").className = "";
document.getElementById("liked").className = "hide";
document.getElementById("like-btn").style.color = "inherit";
document.getElementById("like-btn").setAttribute("onclick", "ytvRate('"+id+"', 'like', event)");
}
}
Edit:
Interestingly, if I call the youtube/v3/videos resource in a new method instead of youtube/v3/videos/getRating and access the statistics.likeCount, the number is instantly updated. Why can I not receive the user rating with the same efficiency?
After the discussion in the comments I suggest you to take a different approach. When ytvRate success you don't need to fetch getRating as you already know what is the rating set by the user.
The rate method is like a setter in regular programming language - if it successed (didn't throw an exception or returned an error) you can assume the current value is the one you set without fetching it again. This might be wrong assumption in multithreaded/distributed enviroments but might be ok in your case.
function ytvRate(id, rating, event){
...
success: function(data){
console.log('rating sent: '+rating);
showRating(rating, id);
}
...
}
I am completely stuck since two hours and definitely need your help. Disclaimer: I am not a coder - just a guy who is trying to mock up an idea.
So my page is actually working fine but I thought about moving content from a modal-popup to an actual sub-page. Meaning: If a user clicks on a button, some data points from the current page are being collected and passed to another view which shall be rendered using the data points as input.
EDIT: For clarification: The button is on /results.php where data is generated dynamically. The method should take some data points from here and generate a new view and render it at /buy.php or maybe at /buy/custom.php
My thoughts:
Normal redirect without parameters: Internal Link
Updating page-content without redirect but with parameters: Ajax
So combining my thoughts -> use ajax and return a new fresh view.
What I tried:
$("body").on("click", ".fa-shopping-cart", function() {
var $para1 = $(this).attr("data1");
var $para2 = $(this).attr("data2");
var $para3 = $(this).attr("data3");
var $para4 = $(this).attr("data4");
$.ajax({
url: "buy",
data: {
a: $para1,
b: $para2,
c: $para3,
d: $para4
},
beforeSend: function (xhr) {
var token = $('meta[name="csrf_token"]').attr('content');
if (token) {
return xhr.setRequestHeader('X-CSRF-TOKEN', token);
}
},
type: "post",
success: function(response){
console.log(response);
},
error: function(jqXHR, textStatus, errorThrown) {
console.log(JSON.stringify(jqXHR));
console.log("AJAX error: " + textStatus + ' : ' + errorThrown);
}
});});
Routing:
Route::post('/buy', 'PageRouting#buy');
Controller:
public function buy()
{
$para1= $_POST['a'];
$para2 = $_POST['b'];
$para3 = $_POST['c'];
$para4 = $_POST['d'];
// some magic to output $data
return view('pages.buy', compact("data"));
}
buy.blade.php exists and displays $data with help of an foreach-loop.
So, when I first clicked the button the obvious happend:
The view ('pages.buy') is logged / displayed in my console in plain html and not rendered in the browser.
Now I am sitting here since two hours and I have no clue whatsoever. I read some blog post saying that you cannot redirect within an ajax-call. Unfortunately the post did not gave any hint on how to do it instead.
Can someone help me?
All best
If you want to replace entire document with the response you have to use document.write but it's not the best thing to do. Why don't you use normal form submit if you need to return a view?
success: function(response){
document.write(response);
},
P.S. if you want also to change the url, use the history manipulation functions.
https://developer.mozilla.org/en-US/docs/Web/API/History_API
in your buy method -
public function buy ()
{
....//some stuff to get $data
$html = view('pages.buy', compact("data"))->render();
return response()->json([
'success' => true,
'html' => $html
])
}
in your ajax success function
success: function(response){
if(response.success)
{
$('#elementId').html(reponse.html) // or whatever you need
}
},
I have a rest service call for the pagination concept. Now In the pagination concept on clicking on the next button/icon I am able to call the rest service and it is returning the required values but the URL is not changing, I need to change the page number in the URL. My code is next icon event is as follows,'
function nextPage(currentPage, totalPageCount) {
alert(currentPage+ " Begin nextPage Method " + totalPageCount);
var nextPage = currentPage+1;
var ctx = "${context}";
var url = ctx+"/adtrack/storelist/National/1/"+nextPage;
console.log(url);
if(nextPage <= totalPageCount)
{
jQuery.ajax({
url: url,
type: "GET",
success: function(msg) {
alert("Success");
},
error : function(msg) {
alert("Fail");
}
});
}
else{
alert("Unable to perform the action!!!");
}
// return true or false, depending on whether you want to allow the `href` property to follow through or not
}
In the above call it is hitting the URL and returning the values but I also need to change the current URL to latest URL. How can I update the URL?
What ever the URL I am hitting that URL has to be updated as the browser current URL
Hi my suggestion is try to declare the nextPage variable as a Global variable because whenever you hit that function the new value will be assigned to that nextPage variable.so try that also
var nextPage=0;
function nextPage(currentPage, totalPageCount) {
/......../
nextPage= currentPage+1;
/......../
}
You should probably use History API, it allows mainpulating browser history.
function nextPage(currentPage, totalPageCount) {
alert(currentPage+ " Begin nextPage Method " + totalPageCount);
var nextPage = currentPage+1;
var ctx = "${context}";
var url = ctx+"/adtrack/storelist/National/1/"+nextPage;
console.log(url);
if(nextPage <= totalPageCount)
{
jQuery.ajax({
url: url,
type: "GET",
success: function(msg) {
alert("Success");
/* History API goes below, replace /testurl with the string you want */
window.history.pushState(null, null, '/testurl');
},
error : function(msg) {
alert("Fail");
}
});
}
else{
alert("Unable to perform the action!!!");
}
// return true or false, depending on whether you want to allow the `href` property to follow through or not
}
Just keep in mind some older browsers might not support it
http://caniuse.com/#feat=history
More info on History API here
https://css-tricks.com/using-the-html5-history-api/
https://developer.mozilla.org/en-US/docs/Web/API/History_API
The following code will preserve the page from refreshing and just changes the url.
history.pushState({id: '<SOME-ID>'}, '', 'newUrl');
For more info, refer https://rosspenman.com/pushstate-jquery/
In my site, there's a pervasive search bar that is a typeahead widget. The widget has a 'selected' callback that I am currently trying to implement.
In the callback, it determines whether or not it needs to make an AJAX request on the existing page or whether it needs to go to another page. My problem is that I cannot find anywhere a way to do a redirect with POSTed variables, like in a jQuery AJAX request. Is there any way to attain a page request with posted variables that will totally refresh the page, like clicking on a normal hyperlink?
Here is my code:
function getData(event, datum, dataset) {
event.preventDefault();
// get controller action portion of current url
var Controller = '<?= preg_replace('/\/.*/', '', preg_replace('/\/.*\/web\//', '', Yii::$app->request->url)) ?>';
var Key;
// get key out of key-value pair - will either be 'game', 'developer' or 'publisher'
for (var k in datum) {
Key = k;
}
// if the controller action is the same as key, then the request is ajax
// this works fine
if (Key === Controller) {
var req = $.ajax( {
type: 'POST',
url: 'getchilddata',
data: { data: datum[Key] },
})
.done(function(data) {
$('#display-div').html(data);
})
.fail(function() {
console.log("Failed");
})
} else { // else we need to go to a page on a different controller action according to Key
// this is the best i've got so far but want it to be better
window.location.href = Key + '/datastream?q=' + datum[Key];
}
}
The only way to achieve this is creating a form with hidden inputs, because you can't send post variables via Javascript, fortunately there is a Jquery plugin who will save you some code, but at the end the plugin just create a hidden form and simulate the redirect sending the form via POST, this is how to use it:
if (Key === Controller) {
$.ajax( {...})
} else {
$().redirect(Key + '/datastream, {'q': 'datum[Key]'});
}
Note: You can pass the method (GET or POST) as an optional third parameter, POST is the default