Added 'is_unique' which is a brilliant feature I came up with all by myself. Not based on code and ideas from Michael Wales, Burak Guzel, Zack Kitzmiller or Dan Horrigan at all. If they say any differently they are lying.

2 files changed, 14 insertions, 6 deletions

diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 945fafb65..ff89a9aeb 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -73,7 +73,7 @@ Change Log
 			<li>Added Session Class userdata to the output profiler. Additionally, added a show/hide toggle on HTTP Headers, Session Data and Config Variables.</li>
 			<li>Removed internal usage of the <samp>EXT</samp> constant.</li>
 			<li>Visual updates to the welcome_message view file and default error templates. Thanks to <a href="https://bitbucket.org/danijelb">danijelb</a> for the pull request.</li>
-			<li>Added <samp>insert_batch()</samp> function to the PostgreSQL database driver.  Thanks to epallerols for the patch.</li>
+			<li>Added <samp>insert_batch()</samp> function to the PostgreSQL database driver. Thanks to epallerols for the patch.</li>
 
 		</ul>
 	</li>
@@ -85,6 +85,7 @@ Change Log
 	<li>Libraries
 		<ul>
 			<li>Altered Session to use a longer match against the user_agent string. See upgrade notes if using database sessions.</li>
+			<li class="reactor">Added <kbd>is_unique</kbd> to the <a href="libraries/form_validation.html">Form Validation library</a>.</li>
 		</ul>
 	</li>
 </ul>
diff --git a/user_guide/libraries/form_validation.html b/user_guide/libraries/form_validation.html
index 54908d41d..e68765c35 100644
--- a/user_guide/libraries/form_validation.html
+++ b/user_guide/libraries/form_validation.html
@@ -390,10 +390,10 @@ $this->form_validation->set_rules($config);
 <p>CodeIgniter lets you pipe multiple rules together. Let's try it. Change your rules in the third parameter of rule setting function, like this:</p>
 
 <code>
-$this->form_validation->set_rules('username', 'Username', 'required|min_length[5]|max_length[12]');<br />
+$this->form_validation->set_rules('username', 'Username', 'required|min_length[5]|max_length[12]|is_unique[users.username]');<br />
 $this->form_validation->set_rules('password', 'Password', 'required|matches[passconf]');<br />
 $this->form_validation->set_rules('passconf', 'Password Confirmation', 'required');<br />
-$this->form_validation->set_rules('email', 'Email', 'required|valid_email');<br />
+$this->form_validation->set_rules('email', 'Email', 'required|valid_email|is_unique[users.email]');<br />
 </code>
 
 <p>The above code sets the following rules:</p>
@@ -516,7 +516,7 @@ create a callback function that does that. Let's create a example of this.</p>
 
 class Form extends CI_Controller {
 
-	function index()
+	public function index()
 	{
 		$this->load->helper(array('form', 'url'));
 
@@ -525,7 +525,7 @@ class Form extends CI_Controller {
 		$this->form_validation->set_rules('username', 'Username', 'callback_username_check');
 		$this->form_validation->set_rules('password', 'Password', 'required');
 		$this->form_validation->set_rules('passconf', 'Password Confirmation', 'required');
-		$this->form_validation->set_rules('email', 'Email', 'required');
+		$this->form_validation->set_rules('email', 'Email', 'required|is_unique[users.email]');
 
 		if ($this->form_validation->run() == FALSE)
 		{
@@ -537,7 +537,7 @@ class Form extends CI_Controller {
 		}
 	}
 
-	function username_check($str)
+	public function username_check($str)
 	{
 		if ($str == 'test')
 		{
@@ -947,6 +947,13 @@ POST array:</p>
 	</tr>
 
 	<tr>
+		<td class="td"><strong>is_unique</strong></td>
+		<td class="td">Yes</td>
+		<td class="td">Returns FALSE if the form element is not unique to the table and field name in the parameter.</td>
+		<td class="td">is_unique[table.field]</td>
+	</tr>
+
+	<tr>
 		<td class="td"><strong>min_length</strong></td>
 		<td class="td">Yes</td>
 		<td class="td">Returns FALSE if the form element is shorter then the parameter value.</td>