/**
* Method is called before setting the field and verifies that, if it is a string,
* it contains a JSON array.
* @method beforeSet_permissions
* @param {string} $value
* @return {array} An array of field name and value
* @throws {Exception} An exception is thrown if $value is not string or is exceedingly long
*/
function beforeSet_permissions($value)
{
if (is_string($value)) {
$decoded = Q::json_decode($value, true);
if (!is_array($decoded) or Q::isAssociative($decoded)) {
throw new Q_Exception_WrongValue(array('field' => 'permissions', 'range' => 'JSON array'));
}
}
return parent::beforeSet_permissions($value);
}
