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.
Related
I have queried on the User table inside the AppController as below
<?php
class AppController extends Controller {
public function beforeFilter() {
function beforeFilter() {
parent::beforeFilter();
if ($this->Session->read('Auth.User.id')) {
$userLoginInfo = $this->User->findByUserId($this->Session->read('Auth.User.id'));
$this->set('userLoginInfo', !empty($userLoginInfo) ? $userLoginInfo : NULL);
}
}
}
}
?>
The $userLoginInfo is available in all ctp files, but I want to access it in all other controller actions as well.
now you put this code in AppController
function beforeFilter(){
$this->set(‘accesstest’ , ‘abc’);
}
And We have to use it in Other controller file say anotherController.php
then we will use $this->viewVars.
here we will be used
$test = $this->viewVars[‘accesstest’];
$this->set('test',$test);
Your own answer is applicable if wanting to set a variable for all Views, but this was not what you were asking in your question.
If you are extending AppController correctly then you can create a property of the AppController class that would then be accessible from any controller that extends it:-
class AppController extends Controller {
public $accesstest = 'abc';
}
Then in any controller that extends AppController you can use:-
$test = $this->accesstest;
echo $test; // 'abc'
However, if you want to share a variable that you want accessible from all controllers that can be changed and you want the change remembering then use the Session:-
$this->Session->write('accesstest', 'abc');
$test = $this->Session->read('accesstest');
$userLoginInfo = $this->viewVars['userLoginInfo'];
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 have a site develop in cakephp 2.x
I want into my controller call a function of another controller like this:
class ProductsController extends AppController {
public $name = 'Products';
public $scaffold;
public $uses = array('Product','Unit');
public function testFunction(){
$this->loadModel('Unit');
$this->Unit->test();
}
}
The function test into UintController.php is this:
public function test(){
echo("test");
}
My model name are Product and Unit.
When I call the function test give me this error:
Error: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'prova' at line 1
In the function now is empty but give me this error.
I have tried with:
public $uses = array('Unit');
and to cancel the line with $uses.
How can I solve it?
To call a function from another controller you can use the requestAction:
Definition
"This function calls a controller’s action from any location and returns data from the action. The $url passed is a CakePHP-relative URL (/controllername/actionname/params). To pass extra data to the receiving controller action add to the $options array".
Usage
This is what your code would looks like:
class ProductsController extends AppController
{
public $name = 'Products';
public $scaffold;
public $uses = array('Product','Unit');
public function testFunction() {
// Calls the action from another controller
echo $this->requestAction('/unit/test');
}
}
And then in the UnitController:
class UnitController extends AppController
{
public function test()
{
return 'Hello, I came from another controller.';
}
}
Warning
As said in the CakePHP Cookbook:
"If used without caching requestAction can lead to poor performance. It is rarely appropriate to use in a controller or model".
Best solution for you
But, the best solution for you, would be to create a function inside a model and then call from your controller, like this:
class ProductsController extends AppController {
public $name = 'Products';
public $scaffold;
public $uses = array('Product','Unit');
public function testFunction() {
echo $this->Unit->test();
}
}
And in the Unit model:
class Unit extends AppModel
{
public function test(){
return 'Hello, I came from a model!';
}
}
Currently i am using something like this:
//at bootstrap.php file
Configure::write('from', 'mymail#mydomain.com')
//at controllers or models files
$var = Configure::read('from')
The thing is, i would like to manage that variable through the database to be able to modify it in a simpler way.
I was thinking about doing it with AppModel but then it would only be accessible for Models and not controllers.
What should I do in this case?
Thanks.
You can create a separate model / plugin which will be mapped to a configuration table in your database. Then load it through $uses statement for controllers and App::import() for models.
class SystemSetting extends AppModel {
/**
* Return a list of all settings
*
* #access public
* #return array
*/
public function getSettings() {
return $this->find('all');
}
}
Then, in your controller:
class SomeController extends AppController {
var $uses = array('SystemSetting');
public function displaySettings() {
$settings = $this->SystemSetting->getSettings();
// .. your code
}
}
In model:
App::import('Model', 'SystemSettings.SystemSetting');
$settings = new SystemSetting();
$mySettings = $settings->getSettings();
This works just fine. Of course, you might also load settings in both AppController and AppModel to follow the DRY rule.
create the getSettings in your AppModel
in AppController you can write this method:
public function getSettings() {
return $this->{$this->modelClass}->getSettings();
}
this way the getSettings() method is available in any model and any controller
any model call:
$mysettings = $this->getSettings();
any controller call:
$mysettings = $this->MODELNAME->getSettings();