ZF2 service factory not injected - php

Question

I have problems solving a catchable error:
Catchable fatal error: Argument 1 passed to
Market\Service\UserService::__construct() must be an instance of
Market\Mapper\UserMapperInterface,
In the constructor of my UserService I use UserMapperInterface (dependency injection). I created a factory class for that and I registered it in my service_manager config. Nothing is happening and an error is shown.
I created factory and services 19287319827 times but now I don't know how I can solve this noob fatal error.
Config:
'service_manager' => array(
'factories' => array(
'Market\Service\UserServiceInterface' => 'Market\Factory\UserServiceFactory',
)
),
Service:
class UserService implements UserServiceInterface
{
/**
* #var object Market\Mapper\UserMappperInteface
*/
protected $userMapper;
/**
* UserService constructor.
*
* #param UserMapperInterface $userMapperInterface
*/
public function __construct(UserMapperInterface $userMapperInterface)
{
$this->userMapper = $userMapperInterface;
}
Factory:
use Zend\ServiceManager\FactoryInterface;
use Zend\ServiceManager\ServiceLocatorInterface;
use Market\Service\UserService;
class UserServiceFactory implements FactoryInterface
{
/**
* Create service
*
* #param ServiceLocatorInterface $serviceLocator
* #return mixed
*/
public function createService(ServiceLocatorInterface $serviceLocator)
{
$userMapperInteface = $serviceLocator->get('Market\Mapper\UserMapperInterface');
return new UserService($userMapperInteface);
}
}
I can't believe that I can't solve this noob fatal error. I'm looking and looking for the last 2 hour in my code and I have been checking everything and I think everything looks good but the class is not injected in my factory.

Answer 1

Your problem lies in this line:
$userMapperInteface = $serviceLocator->get('Market\Mapper\UserMapperInterface');
It probably returns null or at least something else then the expected UserMapperInterface instance. Since you did not share any code on how and where this Market\Mapper\UserMapperInterface is defined or constructed it is hard to say what exactly goes wrong...
Please share more details on that part if you can't figure it out yourself.