I manage this via the $validate variable in the model and a custom
function in AppModel, e.g.:
var $validate = array(
'name' => array(
'name' => array(
'rule' => 'notEmpty',
'message' => 'Please enter a name for this widget.',
'required' => true,
'last' => true
),
'unique' => array(
'rule' => array('checkUnique', array('name',
'client_id')),
'message' => 'This widget already exists.'
)
)
);
You'll notice that in the part that checks for uniqueness this example
checks across two fields (effectively against a multi-field unique
index). You can check against a single field by just using:
'rule' => array('checkUnique', array('name'))
Then, you'll need to put the checkUnique function into your AppModel:
function checkUnique($data, $fields) {
if (!is_array($fields)) {
$fields = array($fields);
}
foreach($fields as $key) {
$tmp[$key] = $this->data[$this->name][$key];
}
return $this->isUnique($tmp, false);
}
Hope this helps.
On Nov 20, 8:54 am, jiru <[email protected]> wrote:
> I have a dropdown list in my form.
> How can i give it a validation criteria such that, if i try to enter
> data from it to database it should check for uniqueness.
> If already an entry is there in the database for it, it should display
> a message.
> We can do it for a text area using validation in the model.How it can
> be done for dropdown list?
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