Develop Reference

Datatable update from another component

I'm using the datatables table plugin for jquery. I have another component that uses Ajax to retrieve an object from the server. I'd like to update the database with this object. I'm struggling on how to piece this together. The Ajax returns an object that is in the format that the datatable will accept for data. But how can I update the datatable from another components Ajax call? I'm using python flask and jinja2 templating. Here is the javascript as it currently exist:
$(function() {
var container = document.getElementById('visualization');
var items = new vis.DataSet({{documents|safe}});
var options = {};
var timeline = new vis.Timeline(container, items, options);
timeline.on('select', function (properties) {
$.getJSON('/getDependencyHistory', {
uuid: properties.items[0]
}, function(data) {
console.log("Place this into the datatable");
});
return false;
});
});
$(document).ready(function() {
var table = $('#example').DataTable();
});

here is a really simple one that "fools" the ajax call.
go to http://live.datatables.net/nesadivo/1/edit
Click on Run With JS button to initialize everything. Click on the go button to go get the data
$(document).ready(function() {
// created a global variable for the datatable to us to find the data
var dtData = null;
// On the button click, use regular ajax to get the data
$("#btnGo").on("click", function(){
$.ajax({url:"http://live.datatables.net/examples/server_side/scripts/server_processing.php",
success:function(cData){
// on success, set the global variable then reload table
dtData = JSON.parse(cData);
$('#example').DataTable( ).ajax.reload();
},
error:function(err){debugger;}} );
});
// initialize the table on page load
$('#example').DataTable( {
"ajax": function(a,callback,c){
callback(dtData);
}
});
});

jQuery getting text content of a span

I am trying to write a delete function in Dropzone.js. In order to do that I need the id of the file the way it was uploaded.
I tried to get a property of an object with no success. Now I am trying to use jQuery to get the value or text content of the span that has it.
this is the screenshot of the structure. The jQuery code I am trying is:
var loooot = $(".dz-filename").parents('span').text();
To be more specific I am trying to get the number 1_1477778745352 (which is a time stamp).
The Dropzone code is as follows:
<script>
var listing_id = "1";
// these are the setting for the image upload
Dropzone.options.pud = {
acceptedFiles: ".jpeg,.jpg,.png,.gif",
uploadMultiple: false,
paramName: "file", // The name that will be used to transfer the file
maxFilesize: 1, // MB
addRemoveLinks: true,
maxFiles: 10,
renameFilename: function (filename) {return listing_id + '_' + new Date().getTime();},
init: function()
{
this.on("removedfile", function(file)
{
var loooot = $("span", ".dz-filename").html();
alert(loooot);
});
}
};
</script>

Try this use JQuery's .text(); to get inner text
Update: use this with DOM .ready() like that.
Deep selector
$(document).ready(function(){
var fname = $("#pud .dz-filename span [data-dz-name]").text();
});
OR (if your form is dynamic)
function get_fname(){
return $("#pud .dz-filename span [data-dz-name]").text();
}
Then use get_fname();

It becomes undefined because dropzone works dynamicly, use this:
$('body').find(".dz-filename").find('span').text();
Best way to do this is to declare dropzone:
//first declare somewhere variable
var my_drop;
// then on creating dropzone:
my_drop = new Dropzone('.dropzone', {
/* your setup of dropzone */
});
Then you can retreive information about files with this:
my_drop.files[0].name
The [0] represent's first file, you can loop through them if there's more then one.

Use:
var loooot = $("span", ".dz-filename").html();
Working Demo.
var loooot = $("span", ".dz-filename").html();
alert(loooot);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="dz-filename">
<span>Test</span>
</div>
EDIT
Since you are setting the text dynamically it may happens that jquery read the HTML before that you set it, to prevent this you have to call this function after the timestamp as a callback (i can't help you without seeing how you set the span text).
So do something like:
function setSpan(callback) {
// Set your stuffs
// Call the callback
callback();
}
function getText() {
// I'm the callback witch get the html
}
//Onload
setSpan(getText());
EDIT
For dropzone you can use queuecomplete that start a function after the queue, i'm not an dropzone expert but i suppose:
init: function () {
this.on("queuecomplete", function (file) {
//Get span html
alert("All files have uploaded ");
});
}

The working solution I found is this:
init: function()
{
this.on("removedfile", function(file)
{
var loooot = $(file.previewElement).find('[data-dz-name]').text();
alert(loooot);
});
}

Add or Delete jQuery sortable element and remember order

I'm implementing something similar to this in one of my Wordpress metabox. User should be able to add and remove jquery-ui sortable elements and remember the position(order) of the elements exists.
I already know how to remember the position(order) when the elements are resorted by dragging and dropping.
jQuery(document).ready(function () {
jQuery('ul').sortable({
stop: function (event, ui) {
var data = jQuery(this).sortable('toArray');
jQuery('#elements-order').val(data);
}
});
});
This will output an array which contains the order like 1,2,3,5,4 But, when new elements are added or elements are deleted, how to make this code run to remember the order of the new elements.
This is the code I use to Add elements
jQuery(document).ready(function () {;
var wrapperSize = jQuery("#element-area-top").width();
(function () {
jQuery(".add-element").on("click", ".add-item", function () {
var start = jQuery("#sortable"),
selectBoxVal = jQuery("#element-list").val();
var element = null;
element = ('<li></li>');
var newRow = jQuery(element);
jQuery(start).append(newRow);
jQuery("#elements-order").val(jQuery('#elements-order').val() + i+',');
});
})();
This is the code I use to delete elements
jQuery("#sortable").on("click", ".delete", function () {
jQuery(this).parents(/*someelement*/).remove();
});
So, could anyone know how to do this ?

You can get sort order with same logic in add/delete functions as well (just replace this with '#ul').
var data = jQuery('#ul').sortable('toArray');
jQuery("#elements-order").val(data);
Or even better, put above code in a common function and just call common function. Here is updated fiddle demonstrating same.

JS adding a number to a class (classname+number)

There's a problem somewhere in ".addClass('clicked'+'nb')
my css classes are named "clicked1" "clicked2" etc.
I tried 'clicked1' and 'clicked2' and they work, but I'd like it to work with the "nb" that is collected.
$(document).ready(function() {
$('.boxes').on('click', '.box', function() {
var data = $(this).data('nb');
var tekst = $('.wrapper');
tekst.addClass('clicked'+'nb');/*'clicked1' is a css class, same with clicked2,3...*/
});
});
https://jsfiddle.net/yujtvd66/2/

I've updated the JSFiddle with the code i think you're looking for.
$('.wrapper').removeClass()
.addClass('wrapper')
.addClass('clicked'+data);

Here you are getting the data of the element to the data variable.
var data = $(this).data('nb');
You need to use that variable wherever you want to use your data.
tekst.addClass('clicked' + data);

$(document).ready(function() {
$('.boxes').on('click', '.box', function() {
var data = $(this).attr('data-nb');
var tekst = $('.wrapper');
tekst.addClass('clicked'+data);
});
});
Fiddle

Select2 onchange not working

When I've added select2 to all selects in my app it worked very nice except when in my select is this property(it works when I don't use select2):
onchange="'refresh()'"
Function refresh:
function refresh()
{
document.forms[0].submit();
}
This is how I run select2
$("select").each(function(){
var this1 = $(this);
if(this1.attr('multiple')!='multiple')
{
this1.select2();
}
});
How to pass this? Or maybe there is some mechanism inside the select2 that deals with that kind of problems? All kinds of suggestions are welcome:D

you need to update this:
$(#Select/Input Element).select2();
$("#select/input element").change(function () {
var valueToSet = $("#select/input element").select2('data').text;
$('#hiddent field to which data to be set').val(valueToSet);
});

Not sure to understand. When one of yours selects changes, you want to call the refresh method? In that case :
$("select").each(function(){
var $this = $(this);
if($this.attr('multiple')!='multiple'){
$this.select2();
$this.change(refresh);
}
});

Remove single quote from onchange="'refresh()'. Try as mentioned below :
<input type="checkbox" onchange="Refresh();"/>
And your script will be defined as below :
<script type="text/javascript">
function Refresh() {
alert('refresh');
}
</script>