dbrecordexist

$inputFilter->add($factory->createInput(array(
              'name' => 'username',
              'required' => true,
              'filters' => array(
                              array('name' => 'StripTags'),
                              array('name' => 'StringTrim'),
              ),
              'validators' => array(
                  array(
                    'name' => 'StringLength',
                    'options' => array(
                                    'encoding' => 'UTF-8',
                                    'min' => 3,
                                    'max' => 100,
                    ),
                  ),
                  array(
                    'name' => 'Db\NoRecordExists',
                    'options' => array(
                        'field'   => 'name',
                        'table'   => 'table',
                        'adapter' => $this->dbAdapter,
                        'message' => 'record exists',
                        'exclude' => array(
                            'field' => 'id',
                            'value' => $id
                        )
                    ),
                )
              ),
            )));