Inserting jQuery's Sortable list into MySql - php

Question

I am trying to insert jquery's sortable list values into MySql. I have issues with looping in MySql while inserting.
I have sorted items like this
-------------
Sorted List
-------------
did-1
fid-1
fid-2
fid-3
After this I have used 'serialize' to get these sorted list
$('.sortable').sortable({
connectWith: '.sortable',
tolerance: 'pointer',
update: function (event, ui) {
$('#add_list').click(function(){
var data = $('#drop_list1').sortable('serialize');
$.ajax({
data: data,
type: 'POST',
url: 'addnewlist.php',
success: function(data){
}
});
});
}
What i want is - Multiple insertion for every 'did', a 'fid' should be inserted. In my MqSql - '(did-1 , fid-1)(did-1 , fid-2)(did-1 , fid-3)'
I have tried this in my PHP.
foreach($_POST['doc'] as $doc)
{
for($i=0;$i<count($_POST['doc']);$i++)
{
$form=$_POST[$i]['form'];
echo $sql="INSERT INTO addnewdoc(doc_id,form_id) VALUES ($doc,$form)";
$res=parent::_executeQuery($sql);
}
}

Answer 1

If I'm understanding this correctly you want to loop through the docs, and then loop through the forms for each doc. Will this work instead?
foreach($_POST['doc'] as $doc)
{
foreach($_POST['form'] as $form)
{
echo $sql="INSERT INTO addnewdoc(doc_id,form_id) VALUES ($doc,$form)";
$res=parent::_executeQuery($sql);
}
}
That ends up running an insert query for each combination. You would be better off building all of the values into a single query and then executing it one time. For example:
$sql = "INSERT INTO addnewdoc(doc_id,form_id) VALUES ";
$values = Array();
foreach($_POST['doc'] as $doc)
{
foreach($_POST['form'] as $form)
$values[] = "($doc,$form)";
}
$sql .= join(',', $values);
$res=parent::_executeQuery($sql);
That gathers all of the values into an array and then joins each of them into a string separated by commas. You can then run a single insert query to insert all of the values.