Codigniter update every row in table with different ID - php

Question

I have a configuration table in a database, using CI3.
Each row has a unique ID, as well as a type_name and type_desc.
So as each row has a unique ID, how can I update the entire table using one update_batch query?
I obviously don't want to run a query on each row, so I'm guessing i need to build an array with the values, but how can do this with the where clause somehow within the array?! Confused.
I basically need to do this:
UPDATE check_types
SET type_name = POSTED_TYPE_NAME, type_desc = POSTED_TYPE_DESC
WHERE check_type_id = ???? POSTED_ID?????

Answer 1

The only way I know of to do this is to extend the db driver.
In the core folder create file with name MY_DB_mysqli_driver.php. file name assumes that the subclass_prefix defined in config.php is MY_
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class MY_DB_mysqli_driver extends CI_DB_mysqli_driver
{
final public function __construct($params)
{
parent::__construct($params);
}
/**
* Insert_On_Duplicate_Key_Update_Batch
*
* Compiles batch insert strings and runs the queries
*
* #param string $table Table to insert into
* #param array $set An associative array of insert values
* #param bool $escape Whether to escape values and identifiers
* #return int Number of rows inserted or FALSE on failure
*/
public function insert_on_duplicate_update_batch($table = '', $set = NULL, $escape = NULL)
{
if ($set !== NULL)
{
$this->set_insert_batch($set, '', $escape);
}
if (count($this->qb_set) === 0)
{
// No valid data array. Folds in cases where keys and values did not match up
return ($this->db_debug) ? $this->display_error('db_must_use_set') : FALSE;
}
if ($table === '')
{
if (!isset($this->qb_from[0]))
{
return ($this->db_debug) ? $this->display_error('db_must_set_table') : FALSE;
}
$table = $this->qb_from[0];
}
// Batch this baby
$affected_rows = 0;
for ($i = 0, $total = count($this->qb_set); $i < $total; $i += 100)
{
$this->query($this->_insert_on_duplicate_key_update_batch($this->protect_identifiers($table, TRUE, $escape, FALSE), $this->qb_keys, array_slice($this->qb_set, $i, 100)));
$affected_rows += $this->affected_rows();
}
$this->_reset_write();
return $affected_rows;
}
/**
* Insert on duplicate key update batch statement
*
* Generates a platform-specific insert string from the supplied data
*
* #param string $table Table name
* #param array $keys INSERT keys
* #param array $values INSERT values
* #return string
*/
private function _insert_on_duplicate_key_update_batch($table, $keys, $values)
{
foreach ($keys as $num => $key)
{
$update_fields[] = $key . '= VALUES(' . $key . ')';
}
return "INSERT INTO " . $table . " (" . implode(', ', $keys) . ") VALUES " . implode(', ', $values) . " ON DUPLICATE KEY UPDATE " . implode(', ', $update_fields);
}
}
You would use it like this:
$sql_array = array();
foreach ($data as $row)
{
$arr = array(
'check_type_id' => $row['check_type_id'],
'type_name' => $row['type_name'],
'type_desc' => $row['type_desc']
);
$sql_array[] = $arr;
}
$this->db->insert_on_duplicate_update_batch('check_types', $sql_array);