Controllers in Drupal frequently need to use services to figure out what information to display on the page. This might include querying for a list of entities, getting information about the current user, or accessing saved configuration. It's a best practice to always use dependency injection to supply services to a controller. In the anytown module we can improve the WeatherPage controller by making it access a weather forecast API to get up-to-date data.
In this tutorial, we'll:
- Set up a mock weather forecast API.
- Refactor our
WeatherPagecontroller to inject thehttp_clientandlogger.factoryservices. - Update the
build()method of our controller to use the provided services to get and display a weather forecast.
By the end of this tutorial you should be able to use dependency injection to give a controller in a Drupal module the services it requires, and then make use of those services in building the page content.
Over the years we've developed some techniques for practicing that we wanted to share. At Drupalize.Me we take hugging seriously. In this tutorial we'll look at the art, and science, of giving a good hug. The Merriam Webster dictionary defines the word hug as; squeeze (someone) tightly in one's arms, typically to express affection.
Did you know there are all kinds of different hugs that you can give? In this tutorial we'll look at:
- Defining what a hug is
- Some of the many types of hugs in the world today
- Precautions you may want to familiarize yourself with before hugging
- And the importance of proper technique
Lets go ahead and get started shall we?