In this article, we are going to look at building a multistep form in Drupal 8. For brevity, the form will have only two steps in the shape of two completely separate forms. To persist values across these steps, we will use functionality provided by Drupal’s core for storing temporary and private data across multiple requests.
This tutorial will guide you how you can create user programitically and also allow the created user to make login for the system after creation. This also help you to know what is the best way to create a user in drupal 8.
For the code perspective, services are accessed via the generic
\Drupal::service() method but in your code it is not recommended to use, use dependency injection to include other services in your class.
It is always good to know how to use core services and as well how to create your own service. Following code snippet can help you to do that.
Create custom service into modulename.service.yml
This tutorial will guide you how you should call core services in your class through dependency injector/ service container. It is never recommended to call core service or any services globally in the class. Developer should try to avoid such code. Following code will help you to know how you should do that.
If you want to get all field list of a specific field type in Drupal 8 there is a easiest way to get them. Lets say you want to get all entity reference fields from all content types.
You just need to use this function in your class. You also need to load entity manager service into class.
In this tutorial we are going to primarily look at how the Symfony Event Dispatcher component works in Drupal.
What is the Event Dispatcher component?
A very good definition of the Event Dispatcher component can be found on the Symfony website:
The EventDispatcher component provides tools that allow your application components to communicate with each other by dispatching events and listening to them.
With Drupal 7 there is now the search API. Apart from the existing database (that uses the same DB as drupal to index with) and Solr integration there are a few other backend options available too. As the open source community is quite prolific, a few supporting modules to allow fuzzy searching, multi index searching, saved searches, autocompletion, attachment indexing and more have sprung up. See the Search API project page for more detail.
Here's how we set up the database indexing:
Drupal core function node_save() is used to save nodes and it is frequently used to programmatically alter and save nodes' data, which includes fields (aka CCK fields) as well. If you want to update a field of a node you could do it like following