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Custom views filters with Search API and Simple Hierarchical Select

by alastairmoore /

A recent project involved the use of the Simple Hierarchical Select module to input category data for a particular content type. Simple Hierarchical Select provides a clean way of browsing hierarchical vocabularies to easily add taxonomy terms to nodes.

An initially tricky user interface problem to utilise this module with Search API and Views exposed filters was solved using a couple of Drupal 8 plugins and a bit of smart thinking!

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Base themes without the bloat

by Rikki Bochow /

Base themes in Drupal are incredibly useful but often add bloat to the finished sub-theme when care isn’t taken to remove unnecessary css files, or files that are 5% used and 95% overridden. When porting aGov to Drupal 8 we took the opportunity to improve how it’s theme inheritance is managed, making it easier to create trim, lightweight sub-themes.

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Introducing Drush CMI tools

by Lee Rowlands /

Now we've got the experience of a number of production D8 sites under our belt we took the time to consolidate our CMI workflow into some useful drush commands.

And naturally we've open sourced them.

Read on to find out more about our drush CMI tools.

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Drupal 8 FTW: Is it a test or is it a form? Actually, its both

by Lee Rowlands /

As you'd be aware by now - Drupal 8 features lots of refactoring of form procedural code to object-oriented.

One such refactoring was the way forms are build, validated and executed.

One cool side-effect of this is that you can now build and test a form with a single class.

Yep that's right, the form and the test are one and the same - read on to find out more.

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Injecting Dependencies into Drupal 8 plugins

by alastairmoore /

As part of our code review process for a current project, it was suggested that rather than calling the static Drupal formBuilder function to insert a form into a custom block, we actually inject the *Form Builder service* directly into the module, and for bonus points also inject the renderer service. I'd previously had exposure to dependency injection earlier on the same project but hadn’t exactly grokked the concept fully and so with a few pointers in the right direction, I set about refactoring the code I’d written using dependency injection and Drupal services. 

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Refactoring Drupal batch API callbacks to increase testability

by Lee Rowlands /

Drupal's Batch API is great, it allows you to easily perform long running processes with feedback to the user.

But during Drupal 8's development processes it was one of the remaining systems that didn't get the full object oriented, service-based architecture.

Much of the batch API is largely unchanged from Drupal 7.

But that doesn't mean you can't write unit-testable callbacks.

Let's get started.

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Making Drupal 8's menu active trail consider query arguments

by Lee Rowlands /

On a recent Drupal 8 client project our client was building listing pages using views exposed filters and adding these to the menu.

This resulted in several menu URLs pointing to the same base path, but with the query arguments determining the difference.

However Drupal 8's default menu-trail calculation was resulting in the menu highlighting all instances when one of them was viewed.

Luckily the active trail calculation is done in a service and it was simple to modify the default behaviour.

Read on to see how we did it.

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Making Drupal 8 datetime widgets use human formats

by Lee Rowlands /

Drupal 8 includes a datetime field type and widget out of the box.

The widget uses the HTML5 date element on supported browsers, providing a polyfill to a text field with jQuery UI's datepicker for browsers that don't yet support HTML5 date inputs.

However - HTML5 date formats always work in ISO8601 format - ie YYYY-MM-DD - which isn't very user-friendly for those using Firefox and Internet Explorer.

Luckily, with a few tweaks you can easily swap this into DD/MM/YYYY format for those browsers and then switch it back server side into the format Drupal expects.

 

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