Retrieve current user in Symfony app while respecting LoD
I'm having some issues understanding how the Law of Demeter should be applied in some cases with Symfony's DI system.
I have some factory that requires to access current logged in user in the application. To do that I need to require @security.token_storage to inject it as a constructor argument.
But in my factory, to access the user I will need to do : $tokenStorage->getToken()->getUser(), and worst, if I want to access some property of my user, I will need to dive one level deeper.
How would you fix this issue according to the law of demeter ?
Here is a sample of my code :
class SomeFactory
{
/**
* @var User
*/
private $currentUser;
/**
* @param TokenStorageInterface $tokenStorage
*/
public function __construct(TokenStorageInterface $tokenStorage)
{
$this->currentUser = $this->setCurrentUser($tokenStorage);
}
/**
* @param TokenStorageInterface $tokenStorage
*/
protected function setCurrentUser(TokenStorageInterface $tokenStorage)
{
if ($tokenStorage->getToken()
&& $tokenStorage->getToken()->getUser()
&& in_array('ADMIN_ROLE', $tokenStorage->getToken()->getUser()->getRoles())
) {
$this->currentUser = $tokenStorage->getToken()->getUser();
}
}
}
I hope i am being clear.
Thank you very much :)
symfony dependency-injection law-of-demeter
asked Nov 25 '18 at 16:26
simsComputingsimsComputing
176
add a comment |
I'm having some issues understanding how the Law of Demeter should be applied in some cases with Symfony's DI system.
I have some factory that requires to access current logged in user in the application. To do that I need to require @security.token_storage to inject it as a constructor argument.
But in my factory, to access the user I will need to do : $tokenStorage->getToken()->getUser(), and worst, if I want to access some property of my user, I will need to dive one level deeper.
How would you fix this issue according to the law of demeter ?
Here is a sample of my code :
class SomeFactory
{
/**
* @var User
*/
private $currentUser;
/**
* @param TokenStorageInterface $tokenStorage
*/
public function __construct(TokenStorageInterface $tokenStorage)
{
$this->currentUser = $this->setCurrentUser($tokenStorage);
}
/**
* @param TokenStorageInterface $tokenStorage
*/
protected function setCurrentUser(TokenStorageInterface $tokenStorage)
{
if ($tokenStorage->getToken()
&& $tokenStorage->getToken()->getUser()
&& in_array('ADMIN_ROLE', $tokenStorage->getToken()->getUser()->getRoles())
) {
$this->currentUser = $tokenStorage->getToken()->getUser();
}
}
}
I hope i am being clear.
Thank you very much :)
symfony dependency-injection law-of-demeter
asked Nov 25 '18 at 16:26
simsComputingsimsComputing
176
It's doubtful that even Demeter expected his self-proclaimed law to be taken seriously. You could probably define a factory service to inject the current user with a type hint. But you need to be careful. The user is not available until part way through the request processing cycle. If your SomeFactory is instantiated before the user is available then you would suffer the consequences of premature injection.
– Cerad
Nov 25 '18 at 16:53
Yes actually that's another issue I just encountered. Since I'm trying to inject the user too early, the conditions are never met in my setCurrentUser method. It seems like what ritter is suggesting on this post is true : stackoverflow.com/questions/32590621/… The service should keep a reference to the tokenStorage so that when the method needing the current user is called, it can access the right value of the user logged in at that particular moment. Otherwise the value is null. So I guess Demeter is not something to be applied here.
– simsComputing
Nov 25 '18 at 17:10
add a comment |
I'm having some issues understanding how the Law of Demeter should be applied in some cases with Symfony's DI system.
I have some factory that requires to access current logged in user in the application. To do that I need to require @security.token_storage to inject it as a constructor argument.
But in my factory, to access the user I will need to do : $tokenStorage->getToken()->getUser(), and worst, if I want to access some property of my user, I will need to dive one level deeper.
How would you fix this issue according to the law of demeter ?
Here is a sample of my code :
class SomeFactory
{
/**
* @var User
*/
private $currentUser;
/**
* @param TokenStorageInterface $tokenStorage
*/
public function __construct(TokenStorageInterface $tokenStorage)
{
$this->currentUser = $this->setCurrentUser($tokenStorage);
}
/**
* @param TokenStorageInterface $tokenStorage
*/
protected function setCurrentUser(TokenStorageInterface $tokenStorage)
{
if ($tokenStorage->getToken()
&& $tokenStorage->getToken()->getUser()
&& in_array('ADMIN_ROLE', $tokenStorage->getToken()->getUser()->getRoles())
) {
$this->currentUser = $tokenStorage->getToken()->getUser();
}
}
}
I hope i am being clear.
Thank you very much :)
symfony dependency-injection law-of-demeter
asked Nov 25 '18 at 16:26
simsComputingsimsComputing
176
I'm having some issues understanding how the Law of Demeter should be applied in some cases with Symfony's DI system.
I have some factory that requires to access current logged in user in the application. To do that I need to require @security.token_storage to inject it as a constructor argument.
But in my factory, to access the user I will need to do : $tokenStorage->getToken()->getUser(), and worst, if I want to access some property of my user, I will need to dive one level deeper.
How would you fix this issue according to the law of demeter ?
Here is a sample of my code :
class SomeFactory
{
/**
* @var User
*/
private $currentUser;
/**
* @param TokenStorageInterface $tokenStorage
*/
public function __construct(TokenStorageInterface $tokenStorage)
{
$this->currentUser = $this->setCurrentUser($tokenStorage);
}
/**
* @param TokenStorageInterface $tokenStorage
*/
protected function setCurrentUser(TokenStorageInterface $tokenStorage)
{
if ($tokenStorage->getToken()
&& $tokenStorage->getToken()->getUser()
&& in_array('ADMIN_ROLE', $tokenStorage->getToken()->getUser()->getRoles())
) {
$this->currentUser = $tokenStorage->getToken()->getUser();
}
}
}
I hope i am being clear.
Thank you very much :)
symfony dependency-injection law-of-demeter
symfony dependency-injection law-of-demeter
asked Nov 25 '18 at 16:26
simsComputingsimsComputing
176
asked Nov 25 '18 at 16:26
simsComputingsimsComputing
176
asked Nov 25 '18 at 16:26
simsComputingsimsComputing
176
asked Nov 25 '18 at 16:26
simsComputingsimsComputing
176
asked Nov 25 '18 at 16:26
simsComputingsimsComputing
176
176
It's doubtful that even Demeter expected his self-proclaimed law to be taken seriously. You could probably define a factory service to inject the current user with a type hint. But you need to be careful. The user is not available until part way through the request processing cycle. If your SomeFactory is instantiated before the user is available then you would suffer the consequences of premature injection.
– Cerad
Nov 25 '18 at 16:53
Yes actually that's another issue I just encountered. Since I'm trying to inject the user too early, the conditions are never met in my setCurrentUser method. It seems like what ritter is suggesting on this post is true : stackoverflow.com/questions/32590621/… The service should keep a reference to the tokenStorage so that when the method needing the current user is called, it can access the right value of the user logged in at that particular moment. Otherwise the value is null. So I guess Demeter is not something to be applied here.
– simsComputing
Nov 25 '18 at 17:10
add a comment |
It's doubtful that even Demeter expected his self-proclaimed law to be taken seriously. You could probably define a factory service to inject the current user with a type hint. But you need to be careful. The user is not available until part way through the request processing cycle. If your SomeFactory is instantiated before the user is available then you would suffer the consequences of premature injection.
– Cerad
Nov 25 '18 at 16:53
Yes actually that's another issue I just encountered. Since I'm trying to inject the user too early, the conditions are never met in my setCurrentUser method. It seems like what ritter is suggesting on this post is true : stackoverflow.com/questions/32590621/… The service should keep a reference to the tokenStorage so that when the method needing the current user is called, it can access the right value of the user logged in at that particular moment. Otherwise the value is null. So I guess Demeter is not something to be applied here.
– simsComputing
Nov 25 '18 at 17:10
It's doubtful that even Demeter expected his self-proclaimed law to be taken seriously. You could probably define a factory service to inject the current user with a type hint. But you need to be careful. The user is not available until part way through the request processing cycle. If your SomeFactory is instantiated before the user is available then you would suffer the consequences of premature injection.
– Cerad
Nov 25 '18 at 16:53
It's doubtful that even Demeter expected his self-proclaimed law to be taken seriously. You could probably define a factory service to inject the current user with a type hint. But you need to be careful. The user is not available until part way through the request processing cycle. If your SomeFactory is instantiated before the user is available then you would suffer the consequences of premature injection.
– Cerad
Nov 25 '18 at 16:53
Yes actually that's another issue I just encountered. Since I'm trying to inject the user too early, the conditions are never met in my setCurrentUser method. It seems like what ritter is suggesting on this post is true : stackoverflow.com/questions/32590621/… The service should keep a reference to the tokenStorage so that when the method needing the current user is called, it can access the right value of the user logged in at that particular moment. Otherwise the value is null. So I guess Demeter is not something to be applied here.
– simsComputing
Nov 25 '18 at 17:10
Yes actually that's another issue I just encountered. Since I'm trying to inject the user too early, the conditions are never met in my setCurrentUser method. It seems like what ritter is suggesting on this post is true : stackoverflow.com/questions/32590621/… The service should keep a reference to the tokenStorage so that when the method needing the current user is called, it can access the right value of the user logged in at that particular moment. Otherwise the value is null. So I guess Demeter is not something to be applied here.
– simsComputing
Nov 25 '18 at 17:10
add a comment |
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It's doubtful that even Demeter expected his self-proclaimed law to be taken seriously. You could probably define a factory service to inject the current user with a type hint. But you need to be careful. The user is not available until part way through the request processing cycle. If your SomeFactory is instantiated before the user is available then you would suffer the consequences of premature injection.
– Cerad
Nov 25 '18 at 16:53
Yes actually that's another issue I just encountered. Since I'm trying to inject the user too early, the conditions are never met in my setCurrentUser method. It seems like what ritter is suggesting on this post is true : stackoverflow.com/questions/32590621/… The service should keep a reference to the tokenStorage so that when the method needing the current user is called, it can access the right value of the user logged in at that particular moment. Otherwise the value is null. So I guess Demeter is not something to be applied here.
– simsComputing
Nov 25 '18 at 17:10