I would like to validate a field in a form - the username - to see if
it is already present in the database. I have it working, but in debug
mode I am getting a javascript warning.
First off, my code:
The ajax call in add.ctp:
[code]<?php echo $ajax->observeField('username', array('url' => '/
users/checkusername',
'update' =>
'usernamestatus',
'frequency' =>
2));[/code]
The users_controller.php function:
[code]function checkusername() {
$this->autoRender=false;
$this->data['User']['username'] =
strtolower($this->data['User']
['username']);
if (!empty($this->data['User']['username'])) {
if
($this->User->validates($this->data['User']['username']))
{
echo "<span class=\"error\">Invalid
userame</span>";
}
else
{
$condition = array('User.username' =>
$this->data['User']
['username']);
$a = $this->User->find($condition);
if (!empty($a)) {
echo "<span
class=\"error\">Username already taken</span>";
}
else
{
echo "<span
class=\"success\">Username available</span>";
}
}
}
}[/code]
The generated HTML code:
[code]new Form.Element.Observer('username', 2, function(element,
value) {new Ajax.Updater('usernamestatus','/users/checkusername',
{asynchronous:true, evalScripts:true,
parameters:Form.Element.serialize('username'), requestHeaders:['X-
Update', 'usernamestatus']})})
[/code]
And finally, the warning I am getting:
[code]Warning (2): array_key_exists() [function.array-key-exists]: The
second argument should be either an array or an object [CORE\cake\libs
\model\model.php, line 2205][/code]
Has anyone an idea of how to solve this? As is aparrent from the
error, I am supposed to pass an argument as an array but I have no
idea what.
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