dynamic fetch data function - mysql

Question

i have made simple database application in zend framework.in that i have made user class and defined different function for database interaction.this function are called from controller class..but i have to declare each time class object for calling the method of user class in each action.how can i declare user class object one time and use in all action method of controller.
here is my controller page
class UserController extends Zend_Controller_Action
{
public function init()
{
/* Initialize action controller here */
Zend_Session::start();
}
public function indexAction()
{
$title = Zend_Registry::get('title');
$this->view->assign('name', 'Wiwit');
$this->view->assign('title', $title);
}
public function logoutAction()
{
Zend_Session::destroy();
$this->redirect("/user/login");
}
public function registerAction()
{
$this->view->assign('title','Register');
$request = $this->getRequest();
$this->view->assign('action', $request->getBaseURL()."/user/register");
if($request->isPost())
{
$data = array('first_name' => $request->getParam('first_name'),
'last_name' => $request->getParam('last_name'),
'user_name' => $request->getParam('user_name'),
'password' => $request->getParam('password')
);
$user = new Application_Model_User();
$rows_affected=$user->user_insert($data);
$this->redirect("/user/login");
}
}
public function loginAction()
{
if(isset($_SESSION['username']))
{
$this->redirect("/user/home");
}
$this->view->assign('title','Register');
$request = $this->getRequest();
$this->view->assign('action', $request->getBaseURL()."/user/login");
if($request->getParam('msg'))
{
$this->view->msg='username or password is invalid';
}
if($request->isPost())
{
$data = array(
'user_name' => $request->getParam('user_name'),
'password' => $request->getParam('password')
);
$user = new Application_Model_User();
$result=$user->user_login($data);
if(empty($result)){
$this->redirect("/user/login/msg/login failed");
}
else{
$_SESSION['username']=$result->user_name;
$this->redirect("/user/home");
}
}
}
public function homeAction()
{
if(isset($_SESSION['username']))
{
$this->view->title='home';
$request = $this->getRequest();
$user = new Application_Model_User();
$result=$user->user_grid();
$this->view->rows=$result;
}
else
{
$this->redirect("/user/login");
}
}
public function editAction()
{
$request = $this->getRequest();
$id= $request->getParam("id");
$user = new Application_Model_User();
$result=$user->user_edit($id);
$this->view->assign('data',$result);
$this->view->action= $request->getBaseURL()."/user/update";
}
}
and here is my user class
<?php
class Application_Model_User extends Zend_Db_Table
{
public function user_insert($data)
{
global $DB;
$rows_affected = $DB->insert('user', $data);
return $rows_affected;
}
public function user_login($data)
{
$u_name=array_shift($data);
$pass=array_shift($data);
$select = $this->_db->select()
->from('user')
->where("user_name = ?",$u_name)
->where("password = ?",$pass);
$result = $this->getAdapter()->fetchRow($select);
return $result;
}
public function user_grid()
{
global $DB;
$sql = 'SELECT * FROM user';
$stmt = $DB->query($sql);
$result = $stmt->fetchall();
return $result;
}
public function user_edit($data)
{
$select = $this->_db->select()
->from('user')
->where("id = ?",$data);
$result = $this->getAdapter()->fetchRow($select);
$data = (array) $result;
return $data;
}
public function userupdate($data,$id)
{
global $DB;
$rows_affected =$DB->update('user', $data,'id = '.$id);
return $rows_affected;
}
public function userdelete($id)
{
global $DB;
$rows_affected =$DB->delete('user','id = '.$id);
return $rows_affected;
}
}
?>

Answer 1

You can create your user object in the init() method, and store it as a class variable.
public function init()
{
/* Initialize action controller here */
Zend_Session::start();
$this->user = new Application_Model_User();
}
Then it's available in any action method.
public function homeAction()
{
if(isset($_SESSION['username']))
{
$this->view->title='home';
$request = $this->getRequest();
$result = $this->user->user_grid(); // changed
$this->view->rows=$result;
}
else
{
$this->redirect("/user/login");
}
}