Comments on: Extending CodeIgniter’s Validation Library To Check For Unique Values http://www.scottnelle.com/41/extending-codeigniters-validation-library/ Scott Nellé's Personal Site Thu, 29 Jul 2010 20:18:32 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Carson Shold http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-6349 Carson Shold Thu, 29 Jul 2010 20:18:32 +0000 http://www.scottnelle.com/?p=41#comment-6349 Well that didn't work at all. The important parts are below <code> class My_Validation extends CI_Form_validation { function My_Validation() { parent::CI_Form_validation(); } </code and <code> function unique($str, $field) { $CI =& get_instance(); list($table, $column) = preg_split("|\.|", $field, 2); $CI->validation->set_message('unique', 'The %s that you requested is unavailable.'); $query = $CI->db->query("SELECT COUNT(*) dupe FROM $table WHERE $column = '$str'"); $row = $query->row(); return ($row->dupe > 0) ? FALSE : TRUE; } </code> Well that didn’t work at all. The important parts are below


class My_Validation extends CI_Form_validation {

function My_Validation()
{
parent::CI_Form_validation();
}
</code
and

function unique($str, $field)
{
$CI =& get_instance();
list($table, $column) = preg_split("|\.|", $field, 2);

$CI->validation->set_message('unique', 'The %s that you requested is unavailable.');

$query = $CI->db->query("SELECT COUNT(*) dupe FROM $table WHERE $column = '$str'");
$row = $query->row();
return ($row->dupe > 0) ? FALSE : TRUE;
}

]]> By: Carson Shold http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-6348 Carson Shold Thu, 29 Jul 2010 20:15:56 +0000 http://www.scottnelle.com/?p=41#comment-6348 This seems so simple but I just can't get it to work. My code is below, can you see what I've done wrong? Thanks <code> validation->set_message('unique', 'The %s that you requested is unavailable.'); $query = $CI->db->query("SELECT COUNT(*) dupe FROM $table WHERE $column = '$str'"); $row = $query->row(); return ($row->dupe > 0) ? FALSE : TRUE; } } ?> </code> This seems so simple but I just can’t get it to work. My code is below, can you see what I’ve done wrong? Thanks


validation->set_message('unique', 'The %s that you requested is unavailable.');

$query = $CI->db->query("SELECT COUNT(*) dupe FROM $table WHERE $column = '$str'");
$row = $query->row();
return ($row->dupe > 0) ? FALSE : TRUE;
}
}
?>

]]> By: David Peers http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-5411 David Peers Sat, 15 May 2010 21:04:29 +0000 http://www.scottnelle.com/?p=41#comment-5411 This blog aided me in narrowing down some problems with the latest release candidate, Why do they often seem to leave out vital information when they release a new version? It may be trivial to them but not to me. I'm sure i'm not alone either. This blog aided me in narrowing down some problems with the latest release candidate, Why do they often seem to leave out vital information when they release a new version? It may be trivial to them but not to me. I’m sure i’m not alone either.

]]> By: Brian http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-5118 Brian Sun, 28 Mar 2010 02:06:53 +0000 http://www.scottnelle.com/?p=41#comment-5118 Looks like the HTML code tags cut out most of the code... The only changes needed are (as noted above): Replace "Validation" with "Form_validation" and replace the split() call with: preg_split("|\.|", $field, 2); Looks like the HTML code tags cut out most of the code…
The only changes needed are (as noted above):
Replace “Validation” with “Form_validation” and replace the split() call with: preg_split(“|\.|”, $field, 2);

]]> By: Brian http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-5117 Brian Sun, 28 Mar 2010 02:02:32 +0000 http://www.scottnelle.com/?p=41#comment-5117 Thanks for the extension! Here is updated code that works with current versions of CI (1.7.2) and PHP(5.3): <code> form_validation->set_message('unique', 'The %s that you requested is already in use.'); $query = $CI->db->query("SELECT COUNT(*) dupe FROM $table WHERE $column = '$str'"); $row = $query->row(); return ($row->dupe > 0) ? FALSE : TRUE; } } ?> </code> Changes are: CI: Validation is now Form_validation PHP: split() has been deprecated. Use preg_split() with | around the regex as delimiters. Thanks for the extension! Here is updated code that works with current versions of CI (1.7.2) and PHP(5.3):

form_validation->set_message('unique', 'The %s that you requested is already in use.');

$query = $CI->db->query("SELECT COUNT(*) dupe FROM $table WHERE $column = '$str'");
$row = $query->row();
return ($row->dupe > 0) ? FALSE : TRUE;
}
}
?>

Changes are:
CI: Validation is now Form_validation
PHP: split() has been deprecated. Use preg_split() with | around the regex as delimiters.

]]> By: nabajit roy http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-4447 nabajit roy Tue, 19 Jan 2010 19:05:40 +0000 http://www.scottnelle.com/?p=41#comment-4447 yes Sir,you are right ,I haven't thought about this issue .thanx for your advice.you r really great..... yes Sir,you are right ,I haven’t thought about this issue .thanx for your advice.you r really great…..

]]> By: Scott Nelle http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-4434 Scott Nelle Sun, 17 Jan 2010 16:37:49 +0000 http://www.scottnelle.com/?p=41#comment-4434 I prefer to extend classes rather than modifying the originals because when codeigniter is updated the originals may be modified. When you extend a class you don't have to keep track of which modifications you've made. I prefer to extend classes rather than modifying the originals because when codeigniter is updated the originals may be modified. When you extend a class you don’t have to keep track of which modifications you’ve made.

]]> By: nabajit roy http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-4433 nabajit roy Sun, 17 Jan 2010 16:19:55 +0000 http://www.scottnelle.com/?p=41#comment-4433 good but the folling is much easier.you dont need to write the complete class but just add the following function in "system/libraries/Form_validation.php" file ........ function unique($str, $field) { //$this->CI //$CI =& get_instance(); list($table, $column) = split("\.", $field, 2); //$this->CI->form_validation->set_message('unique', 'sorry! user '.$str.' doesnot exist.'); $query = $this->CI->db->query("SELECT COUNT(*) dupe FROM $table WHERE $column = '$str'"); $row = $query->row(); return ($row->dupe == 0) ? FALSE : TRUE; } and then call the validation function from you form as follows....... $this->form_validation->set_rules('user_name', 'Admin User Name', 'required|unique[prism_users.user_loginname]'); hows that plz rply thank...... good but the folling is much easier.you dont need to write the complete class but just add the following function in “system/libraries/Form_validation.php” file ……..

function unique($str, $field)
{
//$this->CI
//$CI =& get_instance();
list($table, $column) = split(“\.”, $field, 2);
//$this->CI->form_validation->set_message(‘unique’, ‘sorry! user ‘.$str.’ doesnot exist.’);
$query = $this->CI->db->query(“SELECT COUNT(*) dupe FROM $table WHERE $column = ‘$str’”);
$row = $query->row();
return ($row->dupe == 0) ? FALSE : TRUE;
}

and then call the validation function from you form as follows…….

$this->form_validation->set_rules(‘user_name’, ‘Admin User Name’, ‘required|unique[prism_users.user_loginname]‘);

hows that plz rply thank……

]]> By: Scott Nellé http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-2641 Scott Nellé Tue, 16 Dec 2008 15:33:58 +0000 http://www.scottnelle.com/?p=41#comment-2641 I'm not sure this is the right extension for checking the ID of something while editing, because I imagine in that case you would <em>want</em> the ID to match an existing record, and this extension will throw an error if it exists. Let me know if I'm not following you correctly. You could add another function to this extension called "exists()" that works something like this: <pre><code> function exists($str, $field) { $CI =& get_instance(); list($table, $column) = split("\.", $field, 2); $CI->validation->set_message('exists', "The %s you're looking for doesn't exist."); $query = $CI->db->query("SELECT COUNT(*) dupe FROM $table WHERE $column = '$str'"); $row = $query->row(); return ($row->dupe > 0) ? TRUE : FALSE; } </code></pre> I haven't tested it, but it should work. It does the opposite of the unique function, returning an error if the id <em>doesn't</em> exist. I’m not sure this is the right extension for checking the ID of something while editing, because I imagine in that case you would want the ID to match an existing record, and this extension will throw an error if it exists. Let me know if I’m not following you correctly.

You could add another function to this extension called “exists()” that works something like this:


function exists($str, $field)
{
	$CI =& get_instance();
	list($table, $column) = split("\.", $field, 2);

	$CI->validation->set_message('exists', "The %s you're looking for doesn't exist.");

	$query = $CI->db->query("SELECT COUNT(*) dupe FROM $table WHERE $column = '$str'");
	$row = $query->row();
	return ($row->dupe > 0) ? TRUE : FALSE;
}

I haven’t tested it, but it should work. It does the opposite of the unique function, returning an error if the id doesn’t exist.

]]> By: tresloukadu http://www.scottnelle.com/41/extending-codeigniters-validation-library/comment-page-1/#comment-2638 tresloukadu Tue, 16 Dec 2008 12:23:32 +0000 http://www.scottnelle.com/?p=41#comment-2638 Hello, how unique function would work for an edit form? Because I need to send the id to check too. Hello, how unique function would work for an edit form? Because I need to send the id to check too.

]]>