Get max value from table - php

Question

I am applying this query:
$this->db->select_max('product_id');
$this->db->from('products');
$query=$this->db->get();
return $query->result();
to get max value from table.
But when i add this result to db in another table. like this:
$this->db->insert('images',$product_id);
It show this error:
Error Number: 1054
Unknown column 'Array' in 'field list'
INSERT INTO `images` (`product_id`) VALUES (Array)
Filename: C:\wamp\www\system\database\DB_driver.php
Line Number: 330
I am using codeigniter.

Answer 1

You are applying an array within input here's I have updated your code
Model Code
$this->db->select_max('product_id');
$this->db->from('products');
$query=$this->db->get();
return $query->result_array();
Controller Code
$product_id = $this->Product_area_model->get_product_id();
$data['product_id'] = $product_id[0]['product_id'];
$result = $this->your_model->foo($data);
Model Code
function foo($data = ''){
$this->db->insert('images',$data);
return $this->db->insert_id();
}

Answer 2

Hope it will work for you...
$this->db->insert('images',$product_id[0]['product_id']);

Answer 3

Codeigniter allows you to specify an array of values as the data to insert, but I think your issue is that you're inserting an array of arrays.
If that's the case then use the batch function...
$data = array(
array(
'title' => 'My title' ,
'name' => 'My Name' ,
'date' => 'My date'
),
array(
'title' => 'Another title' ,
'name' => 'Another Name' ,
'date' => 'Another date'
)
);
$this->db->insert_batch('mytable', $data);
// Produces: INSERT INTO mytable (title, name, date) VALUES ('My title', 'My name', 'My date'), ('Another title', 'Another name', 'Another date')