[SOLVED] Chapter 13, Trying to get property of non-object

Archives Agile Web Application Development with Yii1.1 and
1

Everything went well until I made this change (following page 331)


That is, in ProjectController::actionIndex(), simply change this:

$sysMessage = SysMessage::model()->find(array('order'=>'t.update_time DESC',));

to the following:

$sysMessage = SysMessage::getLatest();

Initially there was no problem but I continued with the iteration and made the part about fragment cache applied to Recent Comments on page 332. I tried it out and when I created a new comment and went to the project listing page (to test if the new comment was visible) I got a 500 error. This is the application.log trace:


2011/11/19 18:55:29 [error] [php] Trying to get property of non-object (/path/protected/controllers/ProjectController.php:170)

Stack trace:

#0 /path/YiiRoot/framework/web/filters/CFilterChain.php(134): ProjectController->runAction()

#1 /path/YiiRoot/framework/web/filters/CFilter.php(41): CFilterChain->run()

#2 /path/YiiRoot/framework/web/CController.php(1144): CAccessControlFilter->filter()

#3 /path/YiiRoot/framework/web/filters/CInlineFilter.php(59): ProjectController->filterAccessControl()

#4 /path/YiiRoot/framework/web/filters/CFilterChain.php(131): CInlineFilter->filter()

#5 /path/YiiRoot/framework/web/CController.php(283): CFilterChain->run()

#6 /path/YiiRoot/framework/web/CController.php(257): ProjectController->runActionWithFilters()

#7 /path/YiiRoot/framework/web/CWebApplication.php(277): ProjectController->run()

#8 /path/YiiRoot/framework/web/CWebApplication.php(136): CWebApplication->runController()

#9 /path/YiiRoot/framework/base/CApplication.php(158): CWebApplication->processRequest()

#10 /path/index.php(13): CWebApplication->run()

REQUEST_URI=/path/project

I tested the query in my database and went well, any ideas?

2

Trying to fix it, it appears that the function SysMessage::getLatest() returns a string instead a SysMessage object, therefore the Error 500 is shown.

3

Solved, just making a little change to check whether getLatest() returns an instance of SysMessage or just a string.

ProjectController::actionIndex()


		$sysMessage = SysMessage::getLatest();

		

		if(($sysMessage != null)&&($sysMessage instanceof SysMessage)){

			$message = $sysMessage->message;

		}else if($sysMessage != null){

			$message = $sysMessage;

		}else {

			$message = null;

		}

I also changed SysMessageTest::testGetLatest() to this


	public function testGetLatest() {

		$message = SysMessage::getLatest();

		$this->assertTrue(($message instanceof SysMessage)||(is_string($message)));

	}
4

Hi, i have "Trying to get property on non-object" case too… I want to ask about an error in login action. Let say that i have an application. Those are my code…

EWebUser.php


<?php

class EWebUser extends CWebUser{


    protected $_model;

 

   protected function loadUser()

    {

        if ( $this->_model === null ) {

                $this->_model = StaffDb::model()->findByPk($this->id);

        }

        return $this->_model;

    }


    function getLevel()

    {

        $user=$this->loadUser();

        if ($user->kdstpeg == 02){

        if(substr($user->kdorg,1,4) == '0000') $level=1;

        else if (substr($user->kdorg,2,3) == '000') $level=2;


            return $level;

        }

        return 100;

    }

UserIdentity.php


<?php


/**

 * UserIdentity represents the data needed to identity a user.

 * It contains the authentication method that checks if the provided

 * data can identity the user.

 */

class UserIdentity extends CUserIdentity

{

    private $_id;

	

	public function authenticate()

	{

			$username = strtolower($this->username);

			$user = MUser::model()->find('LOWER(username)=?', array($username));

                if($user===null)

			$this->errorCode=self::ERROR_USERNAME_INVALID;

			else if ($user->pwd!=$this->password)

			$this->errorCode = self::ERROR_PASSWORD_INVALID;

                else

                {

					$this->_id = $user->oldStaffCode;

					$this->username = $user->username;

					$this->errorCode = self::ERROR_NONE;

                }

        return $this->errorCode == self::ERROR_NONE;

	}


	 public function getId()

	{

		return $this->_id;

        }

}

and StaffDb.php (one of my model)


public static function model($className=__CLASS__)

	{

		return parent::model($className);

	}


	/**

	 * @return string the associated database table name

	 */

	public function tableName()

	{

		return 'staffdb';

	}


	/**

	 * @return array validation rules for model attributes.

	 */

	public function rules()

	{

		// NOTE: you should only define rules for those attributes that

		// will receive user inputs.

		return array(

			array('oldStaffCode', 'required'),

			... array('kdstpeg', 'max'=>2),

			

			array('...', 'safe'),

			// The following rule is used by search().

			// Please remove those attributes that should not be searched.

			array('oldStaffCode, kdstpeg, ..., 'safe', 'on'=>'search'),

		);

	}




        public function primaryKey()

        {

          return 'oldStaffCode';

        }

When i’m trying to access this application, the error “Trying to get property of non-object” is shown. Then, i put this code on EWebUser.php


print_r ($user);

in order to see what kind of $user’s view. But it didn’t have any effect. :(

My question is, did I miss something in that codes? Because in my opinion, all of objects are complete. I hope there’s a suggestion to solve this problem. Thanks in advance. :D

5

:rolleyes:

6

Hellow guys

i’m new with yii

i try put this code in my view.php

$S=User::model()->findByPk($model->user_id);

echo $S->nama;

there’s an error message:

"Trying to get property of non-object"

thanks !

i want to echo my user’s “name” in this case

sorry for my bad english