Jquery ui-sortable - unable to drop tr in empty tbody

I have two connected tbody elements allowing me to drag rows between two tables. Everything works fine until all rows are removed from either table.

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When all rows have been dragged to the other table the tbody height decreases making it (near)impossible to drop rows back inside.

Is there a known workaround for this problem? (min-height doesn't work on a tbody element)

Many thanks in advance.

---

What you can do is create a row that is invisible to the "sortable" mechanism. Probably the easiest way to do this is with the "items" option.

Let's say your HTML looks like this

<tbody class="sortable">
    <tr><td>stuff</td></tr>
    <tr><td>stuff</td></tr>
    <tr><td>stuff</td></tr>
    <tr class="sort-disabled"><td></td></tr>
</tbody>

Then in jquery you can have

$('.sortable').sortable({
    items: ">*:not(.sort-disabled)"
});

It's a bit of a hack, but I think if you play around with variations of this (give the .sort-disabled row some height in CSS etc.) you can probably find something that works for you. You could also try having a .sort-disabled row both first and last, so that the place in the middle is the drop target.

Hope this helps!

---

It's hard to force table esp. tbody to have height while it's empty. So I did it in following way.

<div class="ui-widget sortablecolumn">
   <table>
   </table>
</div>  

$( '.sortablecolumn').sortable(
{
   connectWith: '.sortablecolumn',
   items: 'table > tbody > *',
   receive: function(ev, ui) {
        ui.item.parent().find('table > tbody').append(ui.item);
   }
});
$( '.sortablecolumn' ).disableSelection();

Key aspects are items selector and receive event handler where added item is moved into table body.

Now it works fine.

---

Checkout my post about this - you can solve it by attaching a method to the click which adds height to empty containers:

function sortAndDrag() {
 
    //show BEFORE sortable starts
     $(".sortableClass").bind('click mousedown', function(){
          $(".sortableClass").each(function (c) {
                if ($("tbody", this).size() == 0) {
                    $(this).addClass("aClassWhichGivesHeight")
                }
            })
     });
 
    //enable sortable
    $(".sortableClass").sortable({
        connectWith: ".sortableClass",
        stop: function (a, d) {
            $("tbody").removeClass("aClassWhichGivesHeight");
        }
    });
 
}

Something like that?

---

I have the same question, and managed to half solve it by doing this:

$('table').sortable(
{
    connectWith: 'table',
    items: 'tbody tr'
});

This allows me to move rows on to an empty table, and it looks fine, but the element is inserted after the tbody instead of inside it. I think Danny Robert's answer will work for me but I'd be interested in seeing a non hack solution.

---

Here's how I solved the issue with being unable to drop a tr in an empty tbody:

$(function() {

    var sort1 = $('#sort1 tbody');
    var sort2 = $('#sort2 tbody');

   sizeCheck(sort1);
   sizeCheck(sort2);

   //Start the jQuery Sortable for Active and Fresh Promo Tables
   $("#sort1 tbody, #sort2 tbody").sortable({

     items: ">*:not(.sort-disabled)",

     deactivate: function(e, ui) {

        sizeCheck(sort1);
        sizeCheck(sort2);

     },
     //Connect tables to pass data
     connectWith: ".contentTable tbody"

   }).disableSelection();

});

//Prevent empty tbody from not allowing items dragged into it

function sizeCheck(item){
    if($(item).height() == 0){
        $(item).append('<tr class="sort-disabled"><td></td></tr>');
    }
}

---

I know this question has been marked as "answered" but I also wanted to add another way to approach this.

What I do is check if the list empty, if so, create a new row element and inject it into the tbody. I put a message like "No more items" in the td.

Once an item is dropped into the "empty" list, the empty message will be destroyed.

I use Mootools hence the lack of example code.

---

js

$(".sortable").sortable({
    items: 'tbody > tr',
    connectWith: ".sortable"
});

css

.sortable {
    background-color: silver;    
    height: 10px;
}

.sortable td { background-color: white; }

html

<table class='sortable'>    
    <tbody>
        <tr><td colspan="2" class="drop-row" style="display: none;"></td></tr>
    </tbody>    
</table>

More details and even a better code at https://devstuffs.wordpress.com/2015/07/31/jquery-ui-sortable-with-connected-tables-and-empty-rows/

---

Easy solution (PURE CSS):

tbody:after {
    content:" ";
    height:30px;
}

Where the blank space is not a stardard blank space. It's an invisible blank character like the following: Invisible characters - ASCII

Worked for me in FF and Chrome.

---

i use:

$(document).ready(function(){
      $( "#sortable1 tbody, #sortable2 tbody" ).sortable({
      connectWith: ".connectedSortable",
      remove: function(event, ui){ if($(this).html().replace(/^\s+/, "") == '') { $(this).html('<tr class="tmp_tr nobr"><td colspan="7">&nbsp;</td></tr>'); }},
      update: function( event, ui ) {$(this).find('.tmp_tr').remove();},
    }).disableSelection();

});

---

In my case it was about table and tbody collapsing to size 0x0 when no items present. What worked was providing some minimal size for the table and tbody, like this:

table.items-table {
    width: 100%; /*needed for dropping on empty table to work - can be any non-zero value*/
}

table.items-table >tbody { /*needed for dropping on empty table to work */
    display: block;
    min-height: 10px;
}

That was all that was needed.

---

Based on Ismael Miguel comment on Cetnar answer, here is my working solution.

• I send different ajax call for each table (urgent, normal, low priority tasks), and it works fine with empty table dropping.
• In database I update all tasks present in the array sent by ajax with a sorting column.

jQuery code :

$('.draggable-zone').sortable({
    items:       'tr.draggable',
    helper:      'clone',
    appendTo:    'body',
    connectWith: '.draggable-zone',
    update: function(e, ui) {
        $.ajax({
            url:  '/inve/new/sort', 
            type: 'POST',
            data: $(this).sortable('serialize', { 
                key: $(this).attr('data-partl')
            })
        });
    },
    receive: function(e, ui) {
        var $parent = ui.item.parent(); 
        if($parent.is('table')){
            $parent.find('tbody').append(ui.item);
        }
    }
});

HTML / Smarty template (1 table only) :

<table class="table table-striped table-hover table-bordered draggable-zone" data-partl="normal[]">
    <tbody>
        {foreach $data.normal as $task}
            <tr class="draggable" id="sort_{$task.id}">
                <td><b>{$task.title}</b></td>
                ...
            </tr>
        {/foreach}
    </body>
</table>
...