How do i update multiple rows with multiple condition in Code Igniter - php

Question

I am just learning PHP and using the Codeigniter framework.
I'm using this code in my controller when inserting new data and it's working.
//INSERT MULTI ROWS TABEL harga_inventori
$kode_inventori = $_POST['kode_inventori'];
$result = array();
foreach($_POST['kode_kategori_pelanggan'] AS $key => $val){
$result[] = array(
"kode_kategori_pelanggan" => $_POST['kode_kategori_pelanggan'][$key],
"kode_inventori"=>$kode_inventori,
"harga" => $_POST['harga_jual'][$key],
"diskon" => $_POST['diskon'][$key]
);
}
$res = $this->db->insert_batch('harga_inventori', $result);
redirect("inventori");
But when I'm using the same pattern for the updating function, it's not working at all.
for($i = 0; $i < count($_POST['harga_jual'][$i]); $i++) {
if($_POST['kode_kategori_pelanggan'][$i] != '') {
$res[] = array(
'harga' => $_POST['harga_jual'][$i],
'diskon' => $_POST['diskon'][$i],
);
$this->db->where('kode_inventori',$_POST['kode_inventori']);
$this->db->where('kode_kategori_pelanggan',$_POST['kode_kategori_pelanggan'][$i]);
$this->db->update('harga_inventori',$res);
}
}
redirect("inventori");
I'm trying the update_batch() but I got many errors, so I'm using for loop and updating a single row at a time.
What could be the problem here?

Answer 1

Its only a typo. You should pass the array $res not $data, and change $res[] to $res since it is not needed. You should also check with isset() to prevent errors of undefined:
for($i = 0; $i < count($_POST['harga_jual'][$i]); $i++) {
if(isset($_POST['kode_kategori_pelanggan'][$i])) {
$res = array(
'harga' => $_POST['harga_jual'][$i],
'diskon' => $_POST['diskon'][$i],
);
$this->db->where('kode_inventori',$_POST['kode_inventori']);
$this->db->where('kode_kategori_pelanggan',$_POST['kode_kategori_pelanggan'][$i]);
$this->db->update('harga_inventori',$res);
}
}
redirect("inventori");
It would help to see some of your data to know what you are trying to do. It seems a little strange that you initiate the counter $i at the same time using it as an array key in the for loop like this: for($i = 0; $i < count($_POST['harga_jual'][$i]); $i++)
It would help to know how the data in your $_POST looks like. You could try to remove the [$i] in your for loop. I would also check each POST variable it they are set before using them, something like:
for($i = 0; $i < count($_POST['harga_jual']); $i++) {
if(isset($_POST['kode_kategori_pelanggan'][$i])) {
// CHECK IF POST VARIABLES IS SET AND IF NOT SET A DEFAULT VALUE (IN THIS EXAMPLE AN EMPTY STRING):
$harga_jual = isset($_POST['harga_jual'][$i]) ? $_POST['harga_jual'][$i] : '';
$diskon = isset($_POST['diskon'][$i]) ? $_POST['diskon'][$i] : '';
$kode_inventori = isset($_POST['kode_inventori']) ? $_POST['kode_inventori'] : '';
$kode_kategori_pelanggan = $_POST['kode_kategori_pelanggan'][$i]; // ALREADY CHECKED ISSET ABOVE...
$data = array(
'harga' => $harga_jual,
'diskon' => $diskon,
);
$this->db->where('kode_inventori',$kode_inventori);
$this->db->where('kode_kategori_pelanggan', $kode_kategori_pelanggan);
$this->db->update('harga_inventori', $data);
}
}
redirect("inventori");