ZF3：如何从动作函数响应JSON

Question

I'm calling to an action function using angular js. I call the action function and receive the parameters correctly, but when I try to response a JsonModel I don't know why Zend Framework responde with a ViewModel. I think because Zend Framework doesn't detect an Ajax call from Angular JS. So, how can a I call to my action function and Zend Framework detects this call like an Ajax call?

angular js:

self.sendData = function(url, data){
    var promise = $q.defer();
    console.log("Dentro de senDAta!!!");
    var config = {
        headers : {
            "Accept"        :   "application\json",
            "Content-Type"  :   "application\json"
        },
        resposeType : "json"
    };
    $http.post(url, data, config).success(function(response, status, headers, config){
                console.log("dentro de success!!!");
                promise.resolve(response);
            }).error(function(data){
                //Error de sistemas
                console.log("Error en sendData: " + data);
            });
    return promise.promise;        
};  

/application/config/module.config.php

return [
    //...

    'view_manager' => [
        //...

        'strategies' => [
            'ViewJsonStrategy',
        ],
    ],
];

/Controller/LoginController.php

public function loginAction(){
    $request = $this->getRequest();
    $log = new \File\LogWriter();
    $log->writeLog(get_class($this) . "::" . __FUNCTION__ . ": Dentro de loginAction()");
    if ($this->getRequest()->isXmlHttpRequest() === true){
        $log->writeLog(get_class($this) . "::" . __FUNCTION__ . ": Llamada hecha por Ajax");
    }else{
        $log->writeLog(get_class($this) . "::" . __FUNCTION__ . ": Llamada no hecha por ajax");
    }
        $params = json_decode(file_get_contents('php://input'),true);
        $email = $params["email"];
        $password = $params["password"];

        $log->writeLog(get_class($this) . "::" . __FUNCTION__ . ": email: " . $email . " password: " . $password);
        $user = new User($email);
        return new JsonModel([
            "result"    => 0
        ]);             
}

Answer 1

I have found the solution!!! If you want to have the possibility to return a ViewModel or a JsonModel from an action function, you have to follow the next steps in each module of your application where you want to response a ViewModel or a JsonModel

First: In /projectName/module/Application/config/module.config.php

return [
    //...

    'view_manager' => [
        //...

        'strategies' => [
            'ViewJsonStrategy',
        ],
    ],
];

Second: In /projectName/module/Application/src/Module.php:

public function onBootstrap(MvcEvent $e)
{
    // Register a "render" event, at high priority (so it executes prior
    // to the view attempting to render)
    $app = $e->getApplication();
    $app->getEventManager()->attach('render', [$this, 'registerJsonStrategy'], 100);
}

public function registerJsonStrategy(MvcEvent $e)
{
    $app          = $e->getTarget();
    $locator      = $app->getServiceManager();
    $view         = $locator->get('Zend\View\View');
    $jsonStrategy = $locator->get('ViewJsonStrategy');

    // Attach strategy, which is a listener aggregate, at high priority
    $jsonStrategy->attach($view->getEventManager(), 100);
}

Finally, I have to say that the last line of code $jsonStrategy->attach($view->getEventManager(), 100); in function registerJsonStrategy(MvcEvent $e) originally was ...

$view->getEventManager()->attach($jsonStrategy, 100);

You can check this at https://docs.zendframework.com/zend-view/quick-start/#creating-and-registering-alternate-rendering-and-response-strategies

Bur this line of code returns me this error:

[Sat Apr 29 00:23:53.416382 2017] [:error] [pid 21286] [client 127.0.0.1:55362] PHP Fatal error: Uncaught TypeError: Argument 2 passed to Zend\\EventManager\\EventManager::attach() must be callable, integer given, called in /var/www/html/31juegos/module/Application/src/Module.php on line 63 and defined in /var/www/html/31juegos/vendor/zendframework/zend-eventmanager/src/EventManager.php:185\\nStack trace:\\n#0 /var/www/html/31juegos/module/Application/src/Module.php(63): Zend\\EventManager\\EventManager->attach(Object(Zend\\View\\Strategy\\JsonStrategy), 100)\\n#1 /var/www/html/31juegos/vendor/zendframework/zend-eventmanager/src/EventManager.php(322): Application\\Module->registerJsonStrategy(Object(Zend\\Mvc\\MvcEvent))\\n#2 /var/www/html/31juegos/vendor/zendframework/zend-eventmanager/src/EventManager.php(171): Zend\\EventManager\\EventManager->triggerListeners(Object(Zend\\Mvc\\MvcEvent))\\n#3 /var/www/html/31juegos/vendor/zendframework/zend-mvc/src/Application.php(367): Zend\\EventManager\\EventManager ->triggerEvent(Object(Zend\\Mvc\\MvcEvent))\\n#4 /var/www/html/31juegos/vendor/zendframework/zend-mvc/src/Application.php(348): Ze in /var/www/html/31juegos/vendor/zendframework/zend-eventmanager/src/EventManager.php on line 185

So, I have to change this line of code

$view->getEventManager()->attach($jsonStrategy, 100);

By this other line of code:

$jsonStrategy->attach($view->getEventManager(), 100);

And the error is fixed!!!

Hope it helps to someone!!!