function isUnique($data, $fields)
{
// check if the param contains multiple columns or a single one
if (!is_array($fields)) {
$fields = array($fields);
}
// go trough all columns and get their values from the parameters
foreach ($fields as $key) {
$unique[$key] = $this->data[$this->name][$key];
}
// primary key value must be different from the posted value
if (isset($this->data[$this->name][$this->primaryKey])) {
$unique[$this->primaryKey] = "<>" . $this->data[$this->name][$this->primaryKey];
}
// use the model's isUnique function to check the unique rule
return parent::isUnique($unique, false);
}
/**
* Checks the uniqueness of multiple fields
*
* Loops through the field that should be unique.
* If a field is not present in the data array and
* the validation is for an existing record,
* (if an ID is present) it is tried to load the value of the field.
* Otherwise it's considered to be empty (e.g. when adding).
*
* @param Model $model Model using this behavior
* @param array $data Unused
* @param array $fields The fields to be checked
* @return bool True if valid, else false
* @see Model::isUnique() Makes use of
*/
public function multiColumnUniqueness(Model $model, $data, $fields)
{
if (!is_array($fields)) {
$fields = array($fields);
}
$check = array();
foreach ($fields as $key) {
if (isset($model->data[$model->name][$key])) {
$value = $model->data[$model->name][$key];
} elseif (!empty($model->id)) {
$value = $model->field($key, array($model->primaryKey => $model->id));
if ($value === false) {
$value = null;
}
} else {
$value = null;
}
$check[$key] = $value;
}
return $model->isUnique($check, false);
}
