Questions tagged [dependency-injection]

Use it for questions about implementing the software design pattern that implements inversion of control.

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1answer
97 views

Return a Closure from a Factory

I have services that depend on request information. I'm trying to create a Factory Factory which will have the Dependency Injection container returns a factory (an anonymous function) that will create ...
0
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0answers
40 views

Use Injected CacheBackedInterface to invalidate certain bin

I've got a content type called SERVICE (I write it all capitalized to prevent mixture with drupal service) which admin can introduce different SERVICE using this type, it is expected that these ...
1
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1answer
60 views

Calling a Method from another Module's Class [duplicate]

I'm dumb and this is embarrassing, but I'm trying to figure out how I properly use a method from a class in other parts of my code. I need to understand the Drupal way, if not just the php way. I have ...
1
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1answer
72 views

New module service is dependency on old module service - The service has a dependency on a non-existent service

I have a new module moduleB. It defines a service that is used in the dependency injection of moduleA. moduleA is already enabled, its changes are just to the services definition. The info.yml has ...
0
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0answers
49 views

Discover custom services with drush generate

When I create a module and a custom service with drush generate and then create another service, also with drush generate, the first one is not available to inject. What is missing to make it become ...
1
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1answer
36 views

Missing proxy classes when container compiles custom ExtensionPass

Context I try to find a way to integrate Webpack Encore into Drupal. Since we can't use Symfony Bundles in Drupal I want to port the bundle to a custom Drupal module. What I have done so far To ...
0
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0answers
64 views

After installing and configuring simplesamlphp_auth module gives Error on clearing cache

I installed simplesamlphp_auth(8x-3.2) module with drupal (9.1.x). SimpleSAMLphp (1.18.8) is configured correctly. saml authentication works fine, but while clearing cache i am getting the below error....
1
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1answer
51 views

How to inherit base class dependencies without redefining theme in child class service arguments?

The current system I have a set of services classes that extends the same base class ex: class NodeHandler extends ContentEntityHandlerBase {} class ParagraphHandler extends ContentEntityHandlerBase {}...
2
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1answer
84 views

How to inject an object into a service?

I need to do a couple of things: Inject guzzle's httpclient into class A Inject class A into my service What I've tried so far: services: my_module.field_fetcher: class: Drupal\my_module\...
1
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1answer
207 views

How to check config setting in custom service class with dependency injection?

In a custom Service class, I need to check a config setting. I'm able to do this using \Drupal::config(static::SETTINGS) as documented here: https://www.drupal.org/docs/drupal-apis/configuration-api/...
0
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2answers
136 views

Drupal 8 service dependency injection [closed]

I am trying to build a service that will leverage the Pathauto service so my class looks like this. namespace Drupal\some_system; use Drupal\pathauto\PathautoGenerator; use Drupal\pathauto\...
0
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1answer
98 views

Replace \Drupal::service with Dependency injection in FieldWidget class

I have created an ajax callback inside a custom Field Widget plugin. In the Ajax callback I have called a custom service using $service = \Drupal::service('service.name') I am using phpmd to clean ...
2
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2answers
71 views

What good is the create() method? [closed]

Most classes are instantiated using create($container) and __construct(...$services) in conjunction, it seems that the more efficient workflow would be to simply pass the container to the constructor ...
5
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1answer
290 views

What is the right way of loading a service?

when trying to use a service in drupal actually there is 3 ways , what is the preferred way to use a service and why : passing dependencies directly through the constructor: public function ...
3
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0answers
511 views

How can I use TwigExtension from an existing symfony bundle?

UPDATED Context I'm using Symfony Webpack Encore to take care of all the JS and CSS postprocessing, transpiling and so on... There are different ways to implement webpack, even a module, Webpack ...
2
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0answers
55 views

How do I mock a service when using BroswerTestBase? [duplicate]

I am trying to use BrowserTestBase to write a functional test for a Form. The form populates some form elements with data retrieved from an external site. The client for this external site is injected ...
0
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2answers
874 views

How can I inject container to a class with constructor having arguments?

Fatal error: Declaration of Drupal\migrate_upgrade\MigrateUpgradeDrushRunner::create(Psr\Container\ContainerInterface $container, $options = Array) must be compatible with Drupal\Core\...
0
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1answer
62 views

How to use service container correcly?

I want to use service container inside my class so I have this this: class SomeController extends ControllerBase { protected $entityTypeManager; protected $requestStack; public function ...
1
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1answer
120 views

Form state cache breaks dependency injection [duplicate]

I have a class that extends FormBase and there are 6 services that are injected into the class via Dependency Injection (DI). My problem is when I submit the form it says to a class property that ...
-2
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1answer
218 views

How to call method of controller in .module file with dependency injection

I have class named Book. class Popups { private $entityQuery; private $entityTypeManager; public function __construct(QueryFactory $entityQuery, EntityTypeManagerInterface $entity_type_manager)...
-1
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1answer
74 views

What is the logic of create method in ContainerInterface class & its argument when being used and how its related to argument of the construct method?

<?php namespace Drupal\custom_changes\Plugin\Block; use Drupal\Core\Block\BlockBase; use Drupal\Core\Form\FormStateInterface; use Drupal\Core\Plugin\ContainerFactoryPluginInterface; use Symfony\...
4
votes
2answers
900 views

How do I instantiate a custom class with dependency injection?

I am relatively fresh to the DI party and am struggling to get my head around how exactly to use Dependency Injection. I understand that I can pass requirements as part of a service, but what about in ...
0
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1answer
125 views

how to extend FormBuilder::processForm from multiple API endpoints in one class

I'm trying to consolidate my form processing by entity_type, without rebuilding the forms (just using the default forms provided by Drupal. I have dynamic routes pointing to a _controller::method. I'...
0
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0answers
207 views

dependency injection by using $this when not in object context

if i´m using the codesniffer function i´m getting two warnings about: 155 | WARNING | \Drupal calls should be avoided in classes, use dependency injection instead If i´m changing the line from: $...
1
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2answers
636 views

How do I inject UserInterface into Access Control?

I am trying to create a custom access control in my custom module in Drupal 8. But I am having issues in achieving it. I cant find a proper way to inject UserInterface class in access method. ...
1
vote
1answer
889 views

Problem in dependency injection in drupal custom module service

I face with a problem in defining service in drupal 8.0 my service is : services: tracking.middleware: class: Drupal\mkt_tracking_v2\Middleware\TrackingMiddleware arguments: ['@kernel','@...
0
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1answer
47 views

How Webprofiler EntityManagerWrapper overrides EntityTypeManager?

In trying to understand the new paradigm of Dependency Injection, I attempted to install Webprofiler into my D8.6.10 project but it seemed it causes a conflict with my already installed ...
2
votes
1answer
2k views

How to call User::load with dependency injection

I have code that worked, but I wanted to clean it up and use dependency injection. I'm working in a BlockBase that implements ContainerFactoryPluginInterface. class DefaultBlock extends BlockBase ...
1
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1answer
19 views

Front Blank Webpage

Hi I am working on moving my website from local to development, but get this error: Uncaught PHP Exception InvalidArgumentException: "Class "Drupal\entity\QueryAccess\ViewsQueryAlter" does not exist."...
0
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0answers
379 views

Using a class to call a call a custom drush service

I have created a drush service and I can use it on the command line, but I am trying to use dependency injection to use it from another class. However, it is saying that the service cannot be found. (...
1
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1answer
61 views

Get Plugin Definition methods using dependency injection

It is my first time defining a custom Plugin Type. I think that this might be a comming thing in Drupal but I was not able to find any documentation anywhere. I want to get Plugin definition methods ...
0
votes
1answer
565 views

How to properly call dependency classes (Class not found)

I'm creating a custom module that uses PHPMailer, which has been installed in the module's vendor folder via composer. This is the error I get: Error: Class 'PHPMailer' not found in Drupal\multisend\...
0
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1answer
246 views

Instantiate Controller with Interface not concrete class [closed]

As background, I am rebuilding some old code and want to wrap all the curl based requests in an interface (HttpRequestInterface) so I can swap that out later without having to write all the api calls ...
1
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2answers
736 views

Dependency Injection if service exists

Is there any way to use dependency injection in a conditional way, i.e. only if a service exists similar to \Drupal::hasService(). I have a created a service in module A and in module B I have an ...
1
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2answers
109 views

Issue with the cognito module

I am running into the below issue : The website encountered an unexpected error. Please try again later.InvalidArgumentException: Class "\Drupal\cognito\Form\Email\UserLoginForm" does ...
0
votes
2answers
1k views

How to use dependency injection to apply a class static method?

I'm building a custom form (extending ConfigFormBase) and using static method File::load($fid). How to use dependency injection to call this method? Thank you!
2
votes
2answers
2k views

Dependency Injection Syntax

I'm trying to build a simple module (to learn DI) to return the current user ID, and and apparently I'm missing something in the syntax. Here's my code and the error it's producing: use Drupal\Core\...
4
votes
1answer
542 views

Difference between calling a service method in drupal 8

I want to know what difference does it make when i call a service this way : $service = \Drupal::service('myservice.method'); $service->methodNameInService(); or this way (Dependency Injecton) ...
7
votes
2answers
2k views

What is public static function create() in plugins for?

Sometimes I encounter a function public static function create with arguments in plugin classes. For example, here https://www.sitepoint.com/tutorial-on-using-drupal-8-plugin-derivatives-effectively/ ...
2
votes
1answer
1k views

how to inject dependencies into an access controller?

I am altering an existing route and adding a custom access. The custom access is a method that I want to have it in it's own access controller: /** * Alters existing routes. */ public ...
0
votes
1answer
1k views

Creating a simple Drupal 8 custom service - argument should be an instance of a class, recognised as an array

I'm kind of new to Drupal 8 development and object-oriented PHP in general. I've been trying to make a simple custom block module, which includes a service with simple dependency injection. However, I ...
3
votes
1answer
345 views

How can I inject a different service in an existing one, i.e. exchange one already injected service by an own one?

The basic authentication provider service uses the user.auth service: basic_auth.authentication.basic_auth: class: Drupal\basic_auth\Authentication\Provider\BasicAuth arguments: ['@config....
1
vote
1answer
1k views

Why I should use dependency injection in Drupal 8? [closed]

Why is this __construct(MyService $my_service ) { $this->my_service = $my_service; } create (ContainerInterface $container) { return new static( $container->get('my.service')); } ...
0
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2answers
2k views

Dependency injection or \Drupal class methods?

Suppose I have an ExampleService class and I need a service (current_user) to process my logic. So I have implemented my service like this. The way 1: DI standard Drupal namespace Drupal\...
1
vote
1answer
162 views

How to instantiate a service inside ServiceProvider?

I need to instantiate a service inside ServiceProvider. At that point the container is not built. Any ideas or useful links? <?php namespace Drupal\my_module; use Drupal\Core\...
1
vote
0answers
976 views

How to understand and fix a Reflection does not exist error?

I am trying to get my head around using EventSubscriber for adding HTTP Headers. In D7 I would have simply used drupal_add_http_header('Content-Type', 'application/javascript'); But I see that this ...
0
votes
1answer
111 views

Avoiding entity-type errors on module installation

I created a logger service that uses a config entity for configuration: https://drupal.org/project/dblog_persistent Unfortunately, it appears that this module is not installable on a new site, ...
7
votes
1answer
2k views

how to unit test an http client service with DI in drupal 8?

I have a service the consumes data from an external source. I would like to unit test the service and I am not sure how to get the test set up. To start with I would like to just test 1 method. Here ...
7
votes
1answer
2k views

How to inject a service in another service?

I am building a custom service, a membership service. This service can be called from a controller. But what I don't seem to get working, is to use another service, the QueryFactory, to use in that ...
5
votes
1answer
2k views

Dependency Injection and the Url object

I'm making the leap from Drupal 7 to Drupal 8 and am still fuzzy on some core concepts, particularly relating to dependency injection (DI). I've read plenty of tutorials and have a grasp on DI with ...