How I use App controller methods or properties in my own helper method in cake php 2.X?
I have method called get_lan() in App controller and this is my helper but when i run get error message:
Error: Call to undefined function get_lan()
File: C:\wamp\www\app\View\Helper\current_langHelper.php
Line: 8"
Code:
<?php
App::uses('AppHelper', 'View/Helper');
class current_langHelper extends AppHelper {
public $helpers = array('Html');
public function current_lang()
{
var_dump(get_lan());
}
}
Helpers do not call Controller methods. In other words, the Helper does not "see" the Controller members. The Controller should pass information to the View/Helper via the set() method. You could have your get_lang() method (probably better to name it setLang()) to pass the language to the view, something like:
private setLang(){ $this->set('lang',$selectedLanguage); }
You could then use this variable in your view using:
var_dump($lang);
Related
My Code tries to fetch all Main categories of the posts into Appcontroller to show on the homepage:
namespace App\Controller;
use Cake\Core\App;
use Cake\Controller\Controller;
class AppController extends Controller
{
public $helpers = ['Html', 'Form', 'Session','Time','Tree'];
public function initialize()
{
parent::initialize();
$this->loadComponent('Flash');
$this->maincategories();
}
function maincategories(){
App::import('Controller','Postcategories');
$postcates = new PostcategoriesController;
$postcates = $postcategory->find('threaded');
}
}
Your maincategories() method is wrong. You need the model, not the controller to retrieve the data from. You need to use TableRegistry::get('Postcategories') to get the Postcategories model and then call the find on that:-
public function maincategories()
{
$Postcategories = TableRegistry::get('Postcategories');
$this->set('postcategories', $Postcategories->find('threaded'));
}
$this->set() is setting the categories as a view variable ($postcategories). You will need to make sure you include use Cake\ORM\TableRegistry; at the top of your AppController file.
Make sure you've fully read the docs on retrieving data.
I am trying to access the find() on another model in a controller. I am getting a
Call to a member function find() on a non-object error
PollsController.php (controller):
class PollsController extends AppController{
public function add(){
$this->set('appNames', $this->App->find('list'));
}
}
Poll.php (model):
class Poll extends AppModel{
public $belongsTo = array ('App');
}
App.php (model):
class App extends AppModel{
public $hasMany = array('Poll');
}
Note: I have also tried $this->Poll->App->find('list') and still get the same error.
App is reserved keyword. When I change the class to SomethingController.php and Something.php, everything works again.
If you want access another model functions you need load model. There is few ways to do it.
This one is only useful for controllers
$this->loadModel('App');
$this->App->find('first');
This one is good for models and controllers
Read more: CakeAPI: Class ClassRegistry
$appModel = ClassRegistry::init('App');
$appModel->find('first');
This one is good for controllers
Read more: CakeAPI: $uses variable in controller
//in Post Controller
public $use=array('Post','App');
Please load modal in your controller
public $uses = array("Poll");
Im trying to load one appmodel to many controllers. For example i have appmodel called Item and i want to get some items in HomeController and ContactController. When i execute this code:
class HomeController extends AppController {
public function index() {
$items = $this->Item->find('all');
$this->set('items', $items);
}
}
I got this error:
Call to a member function find() on a non-object
How can i get thing from database in many views in CakePHP?
you need to declare which model you want to use in your controller.
class HomesController extends AppController {
var $uses = array('Item', 'AnotherModel');
...
}
var $uses=array('Item');
If using this model in multiple controllers, put this in app controller.
I need to know in a helper in a CakePHP application if the device is mobile, I would love to use $this->RequestHandler->isMobile(), but the request handler component is not available in helpers. Any ideas?
Thanks!
You can import the class and use it anywhere in the framework like so:
App::import('Component', 'RequestHandler'); // import class
$requestHandler = new RequestHandlerComponent(); // instantiate class
$isMobile = $requestHandler->isMobile(); // call method
var_dump($isMobile); // output: bool(true) or bool(false)
(Tested from helper and gives correct results for Firefox and iPhone)
Also, any options you set in the Controller::helpers property will be passed to the helper:
class AppController extends Controller {
public $components = array(/*...*/, 'RequestHandler');
public $helpers = array(/*...*/, 'MyHelper');
public function beforeFilter() {
$this->helpers['MyHelper']['mobile'] = $this->RequestHandler->isMobile();
}
}
You can catch the options array in your helper's constructor:
class MyHelper extends AppHelper {
protected $_defaultOptions = array('mobile' => false);
public function __construct($options) {
$this->options = array_merge($this->_defaultOptions, $options);
}
}
The accepted answer suggests using a component inside a helper which should be avoided as components are for use solely in controllers and will result in errors as mentioned by Anupal.
The simple solution is to use the CakeRequest class that RequestHandlerComponent uses. So in your helper you can do:-
App::uses('CakeRequest', 'Utility');
$isMobile = (new CakeRequest())->is('mobile');
I am new to CakePHP.
I would like to use the model validate mechanism, but I'm having trouble overriding the errors that are displayed. I am building an API where all the views need to be rendered in JSON and I have a JSON format that all errors need to output as. I've defined a custom AppError class and I have successfully be able to define custom errors in this format there.
Is there a way to use the AppError class to override the output of the error messages coming from validation?
Thanks.
I came up with a solution by adding these methods to my AppModel class:
function validates($options = array()) {
$result = parent::validates($options);
if (!$result) {
$this->_validateErrors();
}
return $result;
}
function _validateErrors() {
foreach ($this->validationErrors as $code) {
$this->cakeError('apiError', array('code' => $code)); // Custom JSON error.
return;
}
}
I then manually call $this->Model->validates() before a Model::save() call in my controller. This seems to be working well.
As far as I know, there's no direct way to get validation errors from within your AppError class. The way around it would be to create an AppModel class in app/app_model.php and use the onError() callback method to pass the error to your AppError class.
// app/app_model.php
class AppModel extends Model {
public function onError() {
// Pass the errors to your AppError class
AppError::someErrorMethod($this->getErrors());
}
}