I have defined a custom class (in model without a reference table), it's properties and methods. I am trying to return a response from a controller using the methods of my model. I created a new instance of that class and set the properties. var_dump() works just fine, but i am unable to call the method of that class. How do i do it ??
My model is something like this:
<?php
class Response extends Eloquent{
public $property1;
public function return_property(){
return $this->property1;
}
My code to get that value is something like this:
$response = new Response;
$response->property1 = $somevalue;
$response->return_property();
I am unable to call that method after my comupation. Please help
Related
how do they achieve, that Illuminate\Database\Eloquent\Relations\Relation has access to all query builder functions?
I see they have a $query property, but does not explain how all its methods are available inside relation
If you are aware of php magic methods then you will know __call method
this method will be called when you initialize a php object and you try to call a method which is not available in the class. By using __call method from the Illuminate\Database\Eloquent\Relations\Relation class they are forwarding the call to Illuminate\Database\Eloquent\Builder. I will explain it very clearly by pointing out the code.
Inside the laravel framework there is a trait named as ForwardsCalls . This trait is used in many classes to handle the call forwarding to another class.
So here is how the call from the Relation class is forwarded to Builder class. While initilting the new Relation class Builder class will be initialized. So when you try to call a method from reltion class which is not available it will call __call method. After that it will look for a available macros . So when a macros method is not found. Then it will use forwardDecoratedCallTo from ForwardsCalls Trait.
So forwardDecoratedCallTo will accept 3 arguments namely $object, $method and $parameters. Whereas
$object will be $this->query which has a Illuminate\Database\Eloquent\Builder instance.
$method will be the method the you try to access from Builder Method.
$parameters will be the all the parameters that is be passed to the method.
I will try to Demonstrate will the example without the traits and helpers from laravel
class ClassTwo {
public function classTwoMethodOne()
{
dd(__FUNCTION__.' has been called');
}
public function classTwoMethodTwo()
{
dd(__FUNCTION__.' has been called');
}
public function classTwoMethodThree()
{
//you cannot call this method dynamically
dd(__FUNCTION__.' has been called');
}
}
class ClassOne {
public function classOneMethodOne()
{
dd(__FUNCTION__.' has been called');
}
public function classOneMethodTwo()
{
dd(__FUNCTION__.' has been called');
}
public function __call($methodName, $arguments)
{
$methodsTobeForwarededtoClassTwo = [
'classTwoMethodOne',
'classTwoMethodTwo',
// 'classTwoMethodThree'
//i have commented this method so you cannot access it
//from dynamic calls
];
if(in_array($methodName,$methodsTobeForwarededtoClassTwo))
{
return (new ClassTwo)->{$methodName}($arguments);
}
dd(sprintf(
'Call to undefined method ClassTwo::%s()', $methodName
));
}
}
So here comes the testing part.
$classOneobj = new ClassOne;
Basic Test
dump($classOneobj->classOneMethodOne()); will output as classOneMethodOne has been called
dump($classOneobj->classOneMethodTwo()); will output as classOneMethodTwo has been called
Dynamic Call Test
dump($classOneobj->classTwoMethodOne()); will output as classTwoMethodOne has been called
dump($classOneobj->classTwoMethodTwo()); will output as classOneMethodTwo has been called
dump($classOneobj->classTwoMethodThree()); will output as Call to undefined method ClassTwo::classTwoMethodThree() Because i have commented that method in __call function in ClassOne.
If you still need clarity please post a comment
Is there any possibility in laravel to keep the state of the controller object?
In every example I found, the controller looks the following way:
class MyController extends Controller {
public function getView(){ //return the view }
public function postData() { //save the data }
}
What I would do is to call a service which loads specific data from my data base and return it to the view. In the example above this should be done within the getView() function. What if I need the same data in my postData() function.. Then I have to make another database call in the postData function. It is not possible to have a member variable in 'MyController' and to load the data only once for the class because of routing in laravel. When I call via routing the getView function I get another instance of MyController than I get if I call postData. Is there a possibility to call a specific function only once for the whole controller and to get access to this values from all the functions within the controller?
Is there a possibility to call a specific function only once for the
whole controller and to get access to this values from all the
functions within the controller?
As per my understanding it it not possible. Actually any function of controller is being called via routes. When your any route has been called every time the new object of controller is being created. But it has other way of round. You can use Cache. You can implement it as below:
Call to your specific function of controller.
Get the data from the database.
Store it in Cache for other functions.
In other functions check is data available in Cache? then get from Cache else call your database function to get the data.
Simply in coding as below:
Use Cache;
class MyController extends Controller {
public function getView(){
$data = call_to_database_and_returned_data();
Cache::put('data',$data,120);
return the view
}
public function postData() {
$data = null;
if(Cache::has('data')) {
$data = Cache::get('data');
} else {
$data = call_to_database_and_returned_data();
Cache::put('data',$data,120);
}
}
}
Syntax Description:
Cache::put('name_to_save_data',$your_variable_to_save,for_number_minutes);
public function getPendingOrder($id)
{
$pendingOrder = DB::table('erp_purchase_order_details')->where('product_category_id','=',$id)->where('received','=','0')->count();
return $pendingOrder;
}
To access controller methods in your laravel project we can create the object for that controller then we can call method of controller using created object
Suppose i have a controller Product and one method getPendingOrders() method inside it:
class Product extends BaseController
{
public static function getPendingOrders($id)
{
$pendingOrder = DB::table('erp_purchase_order_details')- >where('product_category_id','=',$id)->where('received','=','0')->count();
return $pendingOrder;
}
}
So in your view you can call this method using ::
For example
{{ Product::getPendingOrders(10); }}
Another method is to create object of that class and then call the method if it is not static.
if you want to extra functionally to your laravel project use laravel widget package its work like wordpress shortcodes and you can call them as laravel blade tags
Please read the document carefully
http://sky.pingpong-labs.com/docs/2.0/widget
Can we call a controller and parsing any values or data to the controller from a method?
let's say that i have this method,
function loader(){
//some operations to call another controller
}
and from that method i want to call a controller named welcome.php wich is located in /application/controller
i'v tried this but it doesn't work
function loader(){
$open = new Welcome();
}
it says that Class Welcome not found
Sorry for my bad english
At first You have to include the file
include('welcome.php');
Then, create the object.
function loader(){
$open = new welcome();
//if you want to call a method in an object
$open->MyWelcomeMethod();
}
Makesure that your loader controller was extended to welcome controller.
Suppose controller welcome,my_controller are two controller and loader function in B then
class Welcome extends CI_Controller {
function my_fun() {}
}
then you can call my_fun() when you are entended from my_controller like
class My_Controller extends Welcome {
$open = $this->my_fun();
}
I'm passing a user object from the controller to the view, then calling a method on that controller. I've done a print_r on the object in the view, so I know it's the right object with the right values. The current_user variable is an instance of the user class.
Here is the line in the layout that gives the error.
<?php echo $this->current_user->get_avatar_url(); ?>
Here is the method in the user class it's calling
public function get_avatar_url()
{
return !empty($this->avatar) ? $this->avatar : $this->fb_userid != '' ? "http://graph.facebook.com/".$this->fb_userid."/picture" : "/public/images/pukie.jpg";
}
This is the error I get
Fatal error: main() The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "User" of the object you are trying to operate on was loaded before unserialize() gets called or provide a __autoload() function to load the class definition in /home/breathel/public_html/application/views/layouts/layout.phtml on line 48
I'm including the full controller base where this in called in case it makes a difference
<?php
Zend_Loader::loadClass('Zend_Controller_Action');
Zend_Loader::loadClass('User');
class BaseController extends Zend_Controller_Action
{
protected $auth;
protected $current_user;
protected $db;
protected function initialize_values()
{
$auth = Zend_Auth::getInstance();
if($auth->hasIdentity())
{
$this->current_user = $auth->getIdentity();
$this->view->current_user = $this->current_user;
}
$this->db = Zend_Registry::get('dbAdapter');
$this->view->controller_name = $this->_request->getControllerName();
$this->view->view_name = $this->_request->getActionName();
}
}
Zend Framework's authorisation module uses sessions to preserve identity across page load and is probably serialising the User model under the covers (especially if you're just assigning the result of a Zend_Auth_Adapter call).
Try including the User class before the first call to getIdentity() and see if that fixes it (even if you're confident you're not serialising it yourself).