I have an AJAX / prototype related question. I have an AJAX call currently placed inline, in the onclick (i promise i'll move it out of there :) event, looking like this:
onclick="var pn = $('yards').value; $('inventory').update('Working...');
new Ajax.Updater('inventory','ajax.php?ac=checkInventory&productID='.$someproductid.'&yards='+pn,{method:'get', evalScripts: true, asynchronous: true, onComplete:function(tr){$('inventory').update(tr.responseText);}});"
File called ajax.php then gets the data from $_GET[], displays a small text input field. When filled in and clicked on a submit button, it calls a function which reads the relevant data from the file, and prints a result on the screen. The purpose of all this code is inventory check.
So, when a user clicks on the "get inventory" button with the onclick defined as above, everything works nice, the user fills the yardage, the right result pops up, everybody happy. But what makes it less usable is the fact that in case a user wants to do another inventory check, the entire page needs to be refreshed. If it's not, then when clicking on "get inventory" button, the user will be getting the same result of the last check again, not the text input field.
So, my question is, how do I make that after one inventory check, the whole thing sort of resets itself so that the next time a user clicks on "get inventory" button, he'll be offered to fill the text input field again, and hence get the new result.
I'm sorry if I didn't make myself clear enough. I'm very new to AJAX and prototype, and this is my colleague's work I need to finish...Thanks!
Ah I see,
I don't think Ajax.Updater works like that; have a look at the doc:
http://www.prototypejs.org/api/ajax/updater
new Ajax.Updater({ success: 'items', failure: 'notice' }, '/items', {
parameters: { text: $F('text') },
insertion: Insertion.Bottom
});
var pn = $('yards').value;
$('inventory').update('Working...');
new Ajax.Updater('inventory','/ajax.php
,{
parameters: { ac: 'checkInventory'
, productId: /*put productId here*/
, yards:/*put yards here too*/
}
, method:'get'
, evalScripts: true
, asynchronous: true
, onSuccess: function(tr){
//try an alert(tr.repsonseText); just to see what you get back
$('inventory').update(tr.responseText);
}
});
Things to try:
Clear the text input field before your repopulate it when the onComplete event fires in your ajax.updater call.
Alert the response to make sure your getting a different response from the server.
*Use Fiddler to make sure your passing in a different productId
Change onComplete to onSuccess
Hope this helps
Since you've promised to move the code out of the onclick handler do:
var inv = $('inventory');
inv.update('Working...');
new Ajax.Request('ajax.php', {
method:'get',
parameters:{
ac:'checkInventory',
yards:$('yards').value
},
onSuccess: function(response)
{
inv.update(response.responseText);
}
});
Related
I am using ajax to go the function and check if the value already exist on the database or not. If the data already exist, I show the jQuery dialog which is working fine but if the value doesn't already exist I don't want to show the popup and refresh the entire page. Here's my AJAX function:
function copyFile(val) {
var choices = document.getElementsByName("choice_shard_with_me").value;
var file_owner = document.getElementById('username').value;
$.ajax({
type: "GET",
url: "/copy_file/",
data: {choices:choices, file_owner:file_owner},
success: function(data){
$('#dialog-confirm').html(data)
}
});
}
My Django view:
if request.GET:
choices = request.GET.getlist('choice_shard_with_me')
file_owner = request.GET.getlist('username')
#Test if the file already exist in the user share directory
x = [File.objects.filter(user_id=request.user.id, file_name=i, flag='A').values_list('file_name') for i in choices]
y = [y[0] for y in x[0]]
if len(y) > 1:
return render_to_response('copyexist.html', {'file':y}, context_instance=RequestContext(request))
//doesn't refresh the whole page show the popup.
else:
//refresh whole page and do something
My question is: when the popup is displayed it is shown using Ajax in a div. If it goes into the else statement file copied is done and the successful message is given in a little div itself(I want to do whole page refresh here).
You can make your answer for example json encoded, where you will return two parameters:
{
success: true/false,
data : YOUR_DATA_HERE
}
So success callback can look into success part, and decide whether to show popup with data, or make page reload
Sorry, I don't know python, so can't advise exact expression to make correct json encode.
I am trying to scrape information from a specified website. This site uses authentication first, thus a i use zombie.js:
var Browser = require("zombie");
var browser = new Browser();
browser.visit("https://*****login.aspx", function(){
browser.fill('#user', '*****');
browser.fill('#pwd', '*****');
var button = browser.querySelector('#btnSubmit');
browser.fire('click', button, function(){
//scraping main.aspx
});
});
It's working, i can scrape the main.aspx: there is a <table>, containig information about new messages(from, date, subject,), the problems comes here: the subject field is clickable, and clicking on it makes a new window appear with the actual message. However it is an ajaxgrid, and when i perform a click:
var field = browser.querySelector('#VeryLongIdOfTheField');
browser.fire('click', field, function(){
console.log(browser.querySelector('#VeryLongIdOfTheFieldContainingTheMessage').innerHTML);
});
it returns an error message, saying that undefined has no innerHTML. I suppose its because this action handled with some ajax magic. I am new in this js/nodejs/jquery/.. world, some help needed to enlight me.
Since the data is populated using async ajax, I'm guessing there's a lag between your click and the actual DOM population inside the node. How about waiting for a bit before checking the content inside the node.
browser.fire('click', field, function(){
setTimeout(function(){
console.log(browser.querySelector('#VeryLongIdOfTheFieldContainingTheMessage').innerHTML);
}, 3000)
});
If the time taken is not very predictable, you could also run it inside a loop until you find the content or exit after a reasonable number of retries.
I am using the jQuery plugin chosen (by Harvest). It is working fine on (document).ready, but I have a button that, when clicked, uses ajax to dynamically create more select objects that I want to use the "chosen" feature. However, only the original select elements have the "chosen" features, and the new (dynamically created) do not work. I am using jQuery.get to append the new elements. Here is a sample of the code:
jQuery(".select").chosen();//this one loads correctly
jQuery("#add-stage").click(function() {
jQuery.get('/myurl',{},function(response) {
//response contains html with 2 more select elements with 'select' class
jQuery('#stages').append(response);
jQuery(".select").chosen();//this one doesn't seem to do anything :-(
});
});
I was thinking that I need a .live() function somewhere, but I haven't been able to figure that out yet. Any help is much appreciated!
Note - I am not trying to dynamically load new options, as specified in the documentation using trigger("liszt:updated");
Ensure that the response elements have the select class.
console.log( response ); // to verify
May also be a good idea to only apply the plugin to the new element(s).
jQuery(".select").chosen();
jQuery("#add-stage").click(function() {
jQuery.get('/myurl',{},function(response) {
console.log( response ); // verify the response
var $response = $(response); // create the elements
$response.filter('.select').chosen(); // apply to top level elems
$response.find('.select').chosen(); // apply to nested elems
$response.appendTo('#stages');
});
});
Also, if /myurl is returning an entire HTML document, you may get unpredictable results.
after you code (fill the select) .write this
$(".select").trigger("chosen:updated");
I had a similar problem with Chosen. I was trying to dynamically add a new select after the user clicks on a link. I cloned the previous select and then added the clone, but Chosen options would not work. The solution was to strip the Chosen class and added elements, put the clone in the DOM and then run chosen again:
clonedSelect.find('select').removeClass('chzndone').css({'display':'block'}).removeAttr('id').next('div').remove();
mySelect.after(clonedSelect);
clonedSelect.find('select').chosen();
one way you can use chosen with ajax:
$.ajax({
url: url,
type: 'GET',
dataType: 'json',
cache: false,
data: search
}).done(function(data){
$.each(data, function(){
$('<option />', {value: this.value, text: this.text}).appendTo(selectObj);
});
chosenObj.trigger('liszt:updated');
});
where selectObj is particular select object
But ...
Chosen is implemented very bad.
It has several visual bugs, like: select some option, then start searching new one, then remove selected and the keep typing - you will get 'Select some options' extended like 'Select some options search value'.
It doesn't support JQuery chaining.
If you will try to implement AJAX you will notice, that when you loose focus of chosen, entered text disappears, now when you will click again it will show some values.
You could try to remove those values, but it will be a hard time, because you cannot use 'blur' event, because it fires as well when selecting some values.
I suggest not using chosen at all, especially with AJAX.
1.- Download Livequery plugin and call it from your page.
2.- Release the Kraken: $(".select").livequery(function() { $(this).chosen({}); });
This is an example of Chosen dynamically loading new options form database using ajax every time Chosen is clicked.
$('.my_chonsen_active').chosen({
search_contains:true
});
$('.my_chonsen_active').on('chosen:showing_dropdown', function(evt, params){
id_tosend=$(this).attr("id").toString();
$.get("ajax/correspondance/file.php",function(data){
$('#'+id_tosend).empty();
$('#'+id_tosend).append(data);
$('#'+id_tosend).trigger("chosen:updated");
});
});
I have a delete button. which on click it should visit a url like /delete/{id} and once the response from that url is true. i want to delete the comment box like in facebook.
I wont add any extra than Leo's comment, but I will explain with some code. Presume that you are using jQuery...
$(document).ready(function(){
$('tr a.delete').live('click', function(e){
e.preventDefault();
var link = $(this);
$.get($(this).attr('href'), null, function(response){
if(response == 'ok'){ //you should invent how to get 'ok' or other string identifying that the deletion is successful.
link.parents('tr').remove();
} else {
alert('There is a problem while deleting this element');
}
});
})
});
if you put this code on your project it will handle all links which had .delete class and are in a table row.
There are two things which you should do:
You need to pass some string in
order to detect if the operation is
successful or not. In my example I
would print "ok" on success
deletion.
If your table has pagination, it wont
rebuild the table, while it just
will remove the row from the table.
and if you have let's say 5 rows per
page and you delete all of them the
page will remain empty while there
will be other records in the table.
That's why instead of removing the
tr I would reload the whole page.
In that case the code for successful deletion will look like this:
if(response == 'ok'){
$('#content').load(window.location);
}
The script is not optimised, but it will give you the ideas how to achieve your ideas.
HTH
So write an onClick event handler in your view, a php delete method on the appropriate controller called by the event handler and a javascript action to perform when the ajax call returns success.
I have a jQuery application, a shopping cart, that posts back info to the server, if the text inputfield is changed. This is done in an Ajax request. Now, if the Ajaxrequest is a success, I want to reload the shoppingcart asynchronously. The code is as follows:
$(document).ready(function() {
var jInput = $(":input");
jInput.change(function() {
var vareAntal = $(this).val();
var vareID = $(this).siblings("input#vareID").val();
$.ajax({
type: 'POST',
url: 'checkout.aspx',
data: { 'ID': vareID, 'Antal': vareAntal },
success: function() {
$("#newbasket").load(location.href + " #newbasket>*", "");
}
});
});
});
This works, but only once! If I change the text inputfield, after the page is loaded for the first time, the div with the ID of newbasket reloads asynchronously. But if I try to change it again, nothing happens.
I've tried to do some debugging with Firebug, and the first time I change the text inputfield, it fires a POST-event, and afterwards a GET-event, when the POST-event is succesful. But after that, nothing happens when I change the text inputfield again.
So, how do I achieve triggering the .load() method after each text input change?
I've also tried experimenting with the .ajaxComplete() function, but that, of course, resulted in an infinite loop, since the .load() is an ajax-object.
Instead of .change(func), use .live('change', func) here, like this:
jInput.live('change', function() {
This will make the selector work on any new inputs added as well. When you're replacing the elements like you are currently, their event handlers are lost (or rather, not re-created, because you have new elements). .live() is just for this purpose, it listens for events from old and new elements, regardless of when they were added.