使用ajax删除来自DB的具有动态ID的表行

Question

I have a table that it's content is comes from database.When I click on the delete button I want to delete that row with Ajax. Actually right now it's working but with a bug and that is all of the rows get deleted when I click on the button and then if I refresh , the row that I was deleted is gone and other rows are shown.But as I said it needs a refresh.Any solution would be appreciated .

 $('.dashboard-subscribe-form').submit(() => { event.preventDefault(); const currentHiddBtn = $('.dash-subscribe-form-btn'); console.log(currentHiddBtn.closest('tr')); const userCaution = confirm('Want to delete this quote?'); if (userCaution) { //If admin insists to delete the row const deleteId = $('.dash-subscribe-form-btn').attr('value'); $.ajax({ type: "POST", url: "delete-subscribe.php", dataType: "json", data: { deleteId: deleteId }, success: (data) => { if (data.code === '200') { console.log('It works!'); currentHiddBtn.closest('tr').css('background', 'tomato'); currentHiddBtn.closest('tr').fadeOut(1200, () => { }); } else if (data.code === '404') { alert('An error occurred!Please try again.'); } } }); } });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <tbody> <?php $count = 1; $sqlCommand = "SELECT * FROM `kq0b3_subscribe`"; $sqlCommandPrepare = $pdoObject->prepare($sqlCommand); $sqlCommandPrepare->execute(); while ($result = $sqlCommandPrepare->fetch()) { ?> <tr id="row-<?php echo $result['id']; ?>"> <td class="dashboard-records"> <?php echo $count; ?> </td> <td class="dashboard-records"> <?php echo $result['email']; ?> </td> <td> <form action="" method="post" class="dashboard-subscribe-form"> <input id="<?php echo $result['id']; ?>" type="hidden" class="dash-subscribe-form-btn" name="hidden-del" value='<?php echo $result[' id ']; ?>'/> <button type="submit" name="sub-del-btn" class="btn btn-danger del" value='<?php echo $result[' id ']; ?>'> Delete </button> </form> </td> </tr> <?php $count++; } ?> </tbody>

delete-subscribe.php:

<?php
require_once('config.php');

$delete_row = $_POST['deleteId'];


if($delete_row){
    $sqlCommand = "DELETE FROM `kq0b3_subscribe` WHERE `id` = ?";
    $sqlCommandPrepare = $pdoObject->prepare($sqlCommand);
    $result = $sqlCommandPrepare->execute([

        $delete_row

    ]);

    /*The json_encode() must be after all of our calculation codes and DB query codes and...(It must be the
       last line of code) */
    echo json_encode(['code' => '200'], JSON_THROW_ON_ERROR, 512);
}
else {
    echo json_encode(['code' => '404'], JSON_THROW_ON_ERROR, 512);
}

---

UPDATE2: now I'm using :

 $('#row-' + deleteId).css('background', 'tomato');
                    $('#row-' + deleteId).fadeOut(1200, () => {

                    });

but the new problem is : it doesn't matter which button I click, the forst row is deleted (when any button is clicked , in the console , the id of the first row-button is printed , not the actual id that I was clicked. ).How can I fix this one?

Answer 1

I think the main issue, in this case, is using CSS classes as a selector and it seems to be selecting the first instance no matter which item you are clicking.

The code causing this is:

const deleteId = $('.dash-subscribe-form-btn').attr('value');

You want to be getting the target input from the event object passed from your .submit() .

I have created a jsfiddle with an example that could be adapted to your code but here is a quick preview of jQuery part.

$('.dashboard-subscribe-form').submit((event) => {
  event.preventDefault()
  console.log(event.target.elements[0]["value"])
  $('#result-from-click').html("Input Value: " + event.target.elements[0]["value"])
})

It is selecting the first element within the elements array which is the input. If you want the button you can use event.target.elements[1]

You could then also use the value returned to remove the <tr> with the same id instead of finding the nearest. This could be done in the success part of your ajax call without doing a refresh.