I m building an app with a procedure to deposit folder so the user must browse different pages like this:
firstPage->secondPage->thirdPage...
So I used this:
<input type="button" value="Go Back" class="btn btn-primary">
But when I'm in the third page and go back it does:
thirdPage->secondPage->thirdPage...
With an infinite loop
How can I fix this?
Thank
Just using {{ URL::previous() }} won't solve your problem, because imagine you're at second page then goes to third, then come back to second: At this moment, the previous page is the third one, that's why this is happening. So if you want to fix this, you'll have to know to where each page should go and place that logic there. So if page2 must go back to page1, you'll have to do something like this:
#if( Request::is('secondPage') )
<script type="text/javascript">
window.location = "{ url('/firstPage') }";
</script>
#else
.....
#endif
Related
I have a navbar on my users' panel. A part of the navbar indicates if the user has a new unread message. In this case a badge will appear next to an icon. I've simplified the codes here to make them easier to understand and read.
So this is the simplified HTML code:
<div class="btn-group msg-box">
<i class="fa fa-envelope"></i>
// this is the default state, no badge is shown
</div>
Here is the AJAX request which calls a custom function every 10 seconds:
<script type='text/javascript'>
$(document).ready(function(){
setInterval(checkMsg,10000);
});
function checkMsg(){
$.get('ajax.php',{user_id : <?php echo $user_id; ?>},function(data){
$('.msg-box').html(data);
});
}
</script>
And this is the ajax.php file content:
if(isset($_GET['user_id']){
// a few lines of code here to check if that particular user has any unread message.
// In such case a variable name $newMessage is set to 1. Now ... :
if($newMessage>0){
$data='
<i class="fa fa-envelope"></i>
<span class="badge"><i class="fa fa-info"></i></span>
';
}else{
$data='
<i class="fa fa-envelope"></i>
';
}
echo $data;
}
First of all, I know the way I've written this AJAX request is very rookie, but it works fine anyway, up to one point!
In case the user has a new message, and if they stay on a page, the code runs perfectly and shows the badge. But when the user refreshes the page or goes to another page, even-though they have a new message, that default state is shown again where there's no badge. And I know it's of course because I have specified a default state via HTML codes.
I need to know how I can keep the result of the AJAX request regardless of how many times the user refreshes the page or goes to another page.
UPDATE
I tried storing the query result in a SESSION in my ajax.php file. So instead of $data I wrote $_SESSION['data'].
Back on my HTML I made the following change:
<div class="btn-group msg-box">
<?php
if(!isset($_SESSION['data'])){
?>
<i class="fa fa-envelope"></i>
<?php
}else{
echo $_SESSION['data'];
}
?>
</div>
I made this change because I considered the fact that SESSIONS, by definition, are created and accessed globally within the domain. So once it's set, it can be checked and used on all other pages.
So that only if that SESSION isn't set, the default state should be displayed. But that as well doesn't seem to have my desired result. Still the same thing happens.
Ok, answering my own question now. :)
My UPDATE seemed to be a good idea which I tried.
The problem there was that I had written session_start(); on my main PHP file which was included in all other PHP files of the project.
So I basically thought that when the ajax.php file is called, there's no need to write session_start(); again. Because ajax.php was called inside a PHP file that had session_start(); in it already. So, I was wrong!
Adding session_start(); to the beginning of my code in ajax.php simply fixed the issue.
I have called scripts on _Layout.cshtml page and my Index.cshtml page has partial view into it. So on page load, SignalR scripts working perfect on partial view, on page end I make another ajax request and load the partial view with another data filled in that and embed under already displayed data, and then the SignalR does not work on the newly embedded record.
This is my index page code:
<div class="col-md-6">
<div class="profile-body">
<div class="row infinite-scroll">
#Html.Partial("_AlbumRow", Model)
</div>
</div>
</div>
This is my partial View Code:
#model IEnumerable<SmartKids.Lib.Core.ViewModels.FileMediaAlbumsVM>
#foreach (var item in Model)
{
<div class="widget">
<div class="block rounded">
<img src="#Url.Content(item.ImageUrl)" alt="#item.Title">
<input type="button" data-image-id="#item.imageId" class="btn btn-sm btn-default">Like</input>
</div>
</div>
}
Kindly help me how to resolve this issue that after making an ajax request I am not able to get those SignalR working. Here is more to say when I put the SignalR scripts on PartialView that works but it also sucks that on each ajax request there is again SignalR loaded on the page and when I click on LIke button it makes many calls to the function behind it.
Kindly help me to resolve this issue, I am stuck at this point since 1 week.
Here is signalR Code:
$(".btn.btn-sm.btn-default").on("click", function () {
var imageId = $(this).attr("data-image-id");
albumClient.server.like(imageId);
});
Problem: You are binding event to elements directly, So when you remove this element and replace it with a different one the events are also removed along with that element, This is something like strongly coupled.
Solution: Use Jquery event delegation. This will make sure the events will be triggered on the current elements and also all the elements that can come in future.
syntax is as below.
$(document).on("click", ".btn.btn-sm.btn-default",function () {
var imageId = $(this).attr("data-image-id");
albumClient.server.like(iamgeId);
});
NOTE: This was never a singlaR issue, it was Jquery issue.
Efficient Way: The problem in using $(document).on("click"... is that when ever there is a click happening on the entire page the Jquery framework will bubble the events from the clicked element upwards(its parent, and its parent and so on..) unless the element specified in the selector arrives, So its kind of performance hit as we don't want this check's to run if we are clicking outside the required area ( button .btn.btn-sm.btn-default in this example).
So best practice is to bind this event delegation to the closest parent possible which will not be removed, <div class="row infinite-scroll"> in this question. So that only when the click happens within this element the event bubbling will happen and also will be stopped once it reaches the parent element,it acts kind of a boundary for event bubbling.
$('.row.infinite-scroll').on("click", ".btn.btn-sm.btn-default",function () {
var imageId = $(this).attr("data-image-id");
albumClient.server.like(iamgeId);
});
I'm using Laravel 4 and am trying to update a (#articles) div with the new articles that are retrieved from an ajax request. When I inspect the page and view the Network section, I can see the POST requests being fired off and it's not showing any errors (eg, articles appear to be returned). However, unfortunately, the #articles div is not being updated with the new information. Yet, if I do a browser refresh, the new articles are displayed.
Routes.php
Route::any("/dashboard/latest_sa", [
"as" => "dashboard/latest_sa",
"uses" => "DashboardController#latest_sa"
]);
controllers/DashboardController.php
Class DashboardController extends \BaseController
{
...
protected function latest_sa()
{
if( Request::ajax() )
{
// called via ajax
$articles = Articles::orderBy('published_at', 'desc')->paginate(20);
return json_decode($articles);
}
else
{
// fresh page load
$articles = Articles::orderBy('published_at', 'desc')->paginate(20);
return $articles;
}
}
...
}
app/views/dashboard/default.blade.php
...
#section("content")
// defined in /public/js/main.js
<script type="text/javascript">
callServer();
</script>
<div class="col-xs-4 col-sm-4 col-md-4 col-lg-4">
<h4>Latest Articles</h4>
<div class="articles">
<ul>
#foreach ($articles as $article)
<li>
<img src="{{ $article->user_image }}" alt="{{ $article->article_title }}" />
{{ $article->article_title }}
<div class="details">
<span class="author">{{ $article->author_name }}</span>
<span class="created">{{ Helpers::time_ago($article->published_at) }}</span>
<span class="symbol">{{ $article->symbol_title }}</span>
</div>
</li>
#endforeach
</ul>
</div>
{{ $articles->links() }}
</div>
...
/public/js/main.js
function callServer()
{
setInterval(function(){
$.ajax({
type: "POST",
url: "dashboard/latest_sa",
success:function(articles)
{
$(".articles").html(articles);
}
});
},5000);
}
JS is hardly my strong suit, so I'm not sure what I'm doing wrong here.
And, for clarity sake, the reason why I'm trying to update all of the articles in the div is so that the Helpers::time_ago method also gets called, instead of just fetching the new articles. This way, it properly shows how long ago the article was published (eg, less than a minute ago, a minute ago, a hour ago, a day ago, etc) without refreshing the page. Essentially, I'm trying to kill two birds with one stone; update the div with the most recent articles, and update the remaining article's published_at attribute using my Helpers::time_ago method. If there is a more effective / efficient way of doing this, feel free to correct me. This seems rather crude, but since it's only for personal use and will never be used for commercial purposes, it suits my needs (not that that excuses bad code).
Nonetheless, from my fairly basic understanding, the JS should be doing the following steps:
1) Fire a POST request off to the /dashboard/latest_sa route
2) Execute the DashboardController#latest_sa action
3) Return a DB collection of all $articles ordered by the latest published date, and paginated
4) Pass the $articles collection back to the JS success attribute (as articles)
5) Fire the anonymous function, with the articles collection as an argument
6) Update the corresponding inner HTML with the results from the articles collection
The logic sounds right, so I'm pretty sure this is going to be a human error (98% of the time it is, after all. lol). Hopefully, someone here will be able to see the (probably glaring) problem in the logic and point me in the right direction.
In the meantime, I'm going to keep toying around with it.
I look forward to your thoughts, ideas, and suggestions. TIA.
EDIT:
Well, I found one of the problems; the articles div is a class, and in the JS I'm referring to it as an id. I fixed that, and now after the timeInterval, the article's div is "updated" but no results are being displayed (none, zippo, nadda).
Yet, if I directly access the /dashboard/latest_sa URI I get the valid JSON response that I'm expecting. So, albeit I am closer, I am still missing something.
EDIT 2:
Okay, in the controller, I made some changes which can be seen above, where I am now doing a json_decode on the $articles, before returning them to be passed into the view. With that in place, the articles are showing back up again after the timeInterval has elapsed, however, the new articles and the published_at for the existing articles are not being updated. After reviewing Inspect -> Network, it shows that the server is responding with a 500 Internal Server Error from the ajax POST request.
Hrm... Seems like I'm going in circles. Sounds like a good time to take a break and go for a walk. ;)
EDIT 3:
Well, I modified my Helpers class and added in the following method to check if the $article is a json object.
public static function isJson($string)
{
json_decode($string);
return (json_last_error() == JSON_ERROR_NONE);
}
app/views/dashboard/index.blade.php
#foreach ($articles as $article)
<?php
if( Helpers::isJson($article) )
{
$article = json_decode($article);
// dd($article) // when uncommented it returns a valid PHP object
}
?>
<!-- Iterate over the article object and output the data as shown above... -->
#endforeach
As you can see, (for the time being) inside of my view's foreach($articles as $article), I run Helpers::isJson($article) as a test and decode the object if it is json. This has enabled me to get passed the 500 Internal Server Error message, populate the articles div with the results on the initial load, and after the ajax POST request is fired off, I'm getting back a server response of 200 OK according to Inspect -> Network. However, after it updates the div, it doesn't show any articles.
Around, and around I go... I think it's time I take that break I keep murmuring about. ;)
Any thoughts, suggestions and / or ideas are greatly welcomed and appreciated.
At first, you should know that, when you return a collection from the controller/route, the response automatically turns in to a json response so, you don't need to use json_decode() and it won't work, instead, you may try something like this (from your controller for ajax):
$articles = Articles::orderBy('published_at', 'desc')->paginate(20);
return View::make('defaultAjax')->with('articles', $articles);
Since building the HTML in the client side using the json data received from server side would be tough for you so, you may return HTML from the server with the generated view instead of json, so you may try something like this in your success handler:
success:function(articles) {
$(".articles").html(articles);
}
Now create a view for ajax response without extending the template like this:
//defaultAjax.blade.php used in the controller for ajax response
<ul>
#foreach ($articles as $article)
<li>
<img src="{{ $article->user_image }}" alt="{{ $article->article_title }}" />
{{ $article->article_title }}
<div class="details">
<span class="author">{{ $article->author_name }}</span>
<span class="created">{{ Helpers::time_ago($article->published_at) }}</span>
<span class="symbol">{{ $article->symbol_title }}</span>
</div>
</li>
#endforeach
</ul>
{{ $articles->links() }}
Notice, there is no #extendds() or #section(), just plain partial view, so it'll be rendered without the template and you can insert the ul inside the .articles div. That's it.
$("#articles").html(articles); ->> $(".articles").html(articles);
I'm trying to set up a basic web page, and it has a small music player on it (niftyPlayer). The people I'm doing this for want the player in the footer, and to continue playing through a song when the user navigates to a different part of the site.
Is there anyway I can do this without using frames? There are some tutorials around on changing part of a page using ajax and innerHTML, but I'm having trouble wrapping my head aroung getting everything BUT the music player to reload.
Thank you in advance,
--Adam
Wrap the content in a div, and wrap the player in a separate div. Load the content into the content div.
You'd have something like this:
<div id='content'>
</div>
<div id='player'>
</div>
If you're using a framework, this is easy: $('#content').html(newContent).
EDIT:
This syntax works with jQuery and ender.js. I prefer ender, but to each his own. I think MooTools is similar, but it's been a while since I used it.
Code for the ajax:
$.ajax({
'method': 'get',
'url': '/newContentUrl',
'success': function (data) {
// do something with the data here
}
});
You might need to declare what type of data you're expecting. I usually send json and then create the DOM elements in the browser.
EDIT:
You didn't mention your webserver/server-side scripting language, so I can't give any code examples for the server-side stuff. It's pretty simple most of time. You just need to decide on a format (again, I highly recommend JSON, as it's native to JS).
I suppose what you could do is have to div's.. one for your footer with the player in it and one with everything else; lets call it the 'container', both of course within your body. Then upon navigating in the site, just have the click reload the page's content within the container with a ajax call:
$('a').click(function(){
var page = $(this).attr('page');
// Using the href attribute will make the page reload, so just make a custom one named 'page'
$('#container').load(page);
});
HTML
<a page="page.php">Test</a>
The problem you then face though, is that you wouldnt really be reloading a page, so the URL also doesnt get update; but you can also fix this with some javascript, and use hashtags to load specific content in the container.
Use jQuery like this:
<script>
$("#generate").click(function(){
$("#content").load("script.php");
});
</script>
<div id="content">Content</div>
<input type="submit" id="generate" value="Generate!">
<div id="player">...player code...</div>
What you're looking for is called the 'single page interface' pattern. It's pretty common among sites like Facebook, where things like chat are required to be persistent across various pages. To be honest, it's kind of hard to program something like this yourself - so I would recommend standing on top of an existing framework that does some of the leg work for you. I've had success using backbone.js with this pattern:
http://andyet.net/blog/2010/oct/29/building-a-single-page-app-with-backbonejs-undersc/
You can reload desired DIVs via jQuery.ajax() and JSON:
For example:
index.php
<script type="text/javascript" src="jquery-1.4.2.js"></script>
<script type="text/javascript" src="ajax.js"></script>
<a href='one.php' class='ajax'>Page 1</a>
<a href='two.php' class='ajax'>Page 2</a>
<div id='player'>Player Code</div>
<div id='workspace'>workspace</div>
one.php
<?php
$arr = array ( "workspace" => "This is Page 1" );
echo json_encode($arr);
?>
two.php
<?php
$arr = array( 'workspace' => "This is Page 2" );
echo json_encode($arr);
?>
ajax.js
jQuery(document).ready(function(){
jQuery('.ajax').click(function(event) {
event.preventDefault();
// load the href attribute of the link that was clicked
jQuery.getJSON(this.href, function(snippets) {
for(var id in snippets) {
// updated to deal with any type of HTML
jQuery('#' + id).html(snippets[id]);
}
});
});
});
I think there is a way to do this in ajax. But if you have a better way please let me know.
I have this code:
$interactionBox= '<input type="button" value="Pending Friend Requests('.$num_rows.')" onclick="return false" onmousedown="javascript:toggleInteractContainers(\'friend_requests\');"/>';
This code opens up a togle box where user can accept friends if there is a pending request.
So if button looks like this:
Pending Friend Request(1)
And user accepts that request user has to refresh the page for this to show as:
Pending Friend Request(0)
Is there a way to do this without refreshing the page using ajax or any other way?
Here is HTML for above code:
<div class="interactContainers" id="add_friend">
<div align="right">cancel </div>
Add <?php echo $username; ?> as a friend?
Yes
You can just get the value between brackets with JavaScript and then reduce by 1,
You can get that value (if it isn't a variable get via regexpresion:
var button = document.getElementById('buttonid'); // fill in the id
button.value = "Pending Friend Requests("+ (parseInt(button.value.match(/\d{1,10}/)) - 1) + ')';
just excute that after each accept (or not-accept)
note you should just use the function in onclick, it's not a link so it will only excute the javacript bit: so no onmousedown just onclick="javascript:toggleInteractContainers(\'friend_requests\');"
look ma: no jQuery!