Question

I’m trying to add rows to html tables in a CakePHP view and increment the id’s/names where necessary. The code used to generate the table is:

<tbody>
  <tr>
    <td><?php echo $this->Form->input('OrderDetail.0.product_code'); ?></td>
    <td><?php echo $this->Form->input('OrderDetail.0.product_name'); ?></td>
    <td><?php echo $this->Form->input('OrderDetail.0.product_qty'); ?></td>
    <td><?php echo $this->Form->input('OrderDetail.0.product_price'); ?></td>
  </tr>
</tbody>

CakePHP outputs the following html:

<tbody>
  <tr>
    <td><div class="input text"><input name="data[OrderDetail][0][product_code]" maxlength="100" type="text"/></div></td>
    <td><div class="input text"><input name="data[OrderDetail][0][product_name]" maxlength="255" type="text"/></div></td>
    <td><div class="input number"><input name="data[OrderDetail][0][product_qty]" step="any" type="number"/></div></td>
    <td><div class="input number"><input name="data[OrderDetail][0][product_price]" step="any" maxlength="24" type="number"/></div></td>
  </tr>
</tbody>

On clicking a link/button I would like a row added to the table in the same format but with the array incremented by 1 as such:

<tbody>
  <tr>
    <td><div class="input text"><input name="data[OrderDetail][0][product_code]" maxlength="100" type="text"/></div></td>
    <td><div class="input text"><input name="data[OrderDetail][0][product_name]" maxlength="255" type="text"/></div></td>
    <td><div class="input number"><input name="data[OrderDetail][0][product_qty]" step="any" type="number"/></div></td>
    <td><div class="input number"><input name="data[OrderDetail][0][product_price]" step="any" maxlength="24" type="number"/></div></td>
  </tr>
  <tr>
    <td><div class="input text"><input name="data[OrderDetail][1][product_code]" maxlength="100" type="text"/></div></td>
    <td><div class="input text"><input name="data[OrderDetail][1][product_name]" maxlength="255" type="text"/></div></td>
    <td><div class="input number"><input name="data[OrderDetail][1][product_qty]" step="any" type="number"/></div></td>
    <td><div class="input number"><input name="data[OrderDetail][1][product_price]" step="any" maxlength="24" type="number"/></div></td>
  </tr>
</tbody>

I can get the desired result using plain old Javascript, but I’m looking for a more elegant solution. I have jQuery and the JSHelper loaded.

Answer 1

my solution would be this

$(":button").click(function() {
    $("tr:last-child").clone().appendTo('tbody'); //clone the last row
    $("tr:last-child input").each(function() { //for each input in the last row, do the following
        var nameAttr = $(this).attr('name'); //get the whole value of attribute 'name'
        var newIndex = parseInt(nameAttr.replace(/[^\d]/g, ''))+1; //get the digit and add one
        $(this).attr('name',nameAttr.replace(/\d/,newIndex)); //replace the old digit with new

    });
});

Demo: http://jsfiddle.net/CKxLh/