is_unique for codeigniter form validation

Question

I\'m trying to figure out how I can use the is_unique rule from the Codeigniter form validation library in the following situation.

I\'m trying to submi

Answer 1

Here's an easy method that worked for me and uses well documented code (thanks to https://github.com/ivantcholakov for sharing it!). I found it referenced at https://github.com/bcit-ci/CodeIgniter/issues/3109#issuecomment-46346280

1. Download https://github.com/ivantcholakov/starter-public-edition-3/blob/master/platform/application/libraries/MY_Form_validation.php (MIT licensed) and save it to your application at application\libraries\MY_Form_validation.php

2. Delete these two lines from __construct():

   $this->CI->load->helper('checkbox'); $this->CI->load->helper('email');

3. Delete all the functions except __construct() and unique().

4. At the end of the __construct() method of your controller add this line:

   $this->load->library('form_validation');

5. As per the documentation of the unique() method update your validation rule to add a "unique" rule like this (e.g. if you already have required and trim rules):

   …|required|unique[tablename.fieldname,tablename.(primaryKey-used-for-updates)]|trim...