How do I update multiple inputs with the same name in codeigniter? - php

Question

This is what I have so far
Controller
$i = 0;
foreach ($this->input->post('skill') as $cat) {
$data[$i++]['skill'] = $cat;
}
$this->db->update_batch('skills', $data);
}
Model
function update_record($data)
{
$this->db->update('skills', $data);
}
View
<?php foreach ($skills as $skill):?>
<input type="text" name="skill[]" value="<?php echo $skill->skill;?>">
<?php endforeach?>
I am getting a database error
You must specify an index to match on for batch updates.
Please help me fix this I tried googling and nothing is coming up.

Answer 1

Ok, here is the issue.
According to the CI Docs for update_batch you need to add a third parameter that is the where key . Here is an example from the docs.
$data = array(
array(
'title' => 'My title' ,
'name' => 'My Name 2' ,
'date' => 'My date 2'
),
array(
'title' => 'Another title' ,
'name' => 'Another Name 2' ,
'date' => 'Another date 2'
)
);
$this->db->update_batch('mytable', $data, 'title');
So, above in the queries the title column is what the row is compared to. So for the rows that have title as 'My Title' The first array element is used as update and for those with 'Another Title' the second element. I hope you understand. If we don't have a compare field then the whole database will be updated :-P
Here is the final query produced from the above operation.
UPDATE `mytable` SET `name` = CASE
WHEN `title` = 'My title' THEN 'My Name 2'
WHEN `title` = 'Another title' THEN 'Another Name 2'
ELSE `name` END,
`date` = CASE
WHEN `title` = 'My title' THEN 'My date 2'
WHEN `title` = 'Another title' THEN 'Another date 2'
ELSE `date` END
WHERE `title` IN ('My title','Another title')
Hope this helps.