Is there a way I can improve my own developer experience here? The short answer is yes. This information seems important and quite possibly contains data I want to get my hands on, but right now it's neither fun nor easy to read that output. That’s supposed to be useful? I WANT PRETTY ARRAYS." (There's another delimiter and we'll get to that in a moment.) The double curly braces are Twig delimiters, meaning, inside these braces, is Twig. I'll type this into my file, just below the top comment block. Now, just so you know, when you try to use dump() on, you’ll probably get a White Screen Of Death (WSOD) because it just takes too much memory to recursively traverse and print all those variables.īut just for starters, let’s say I already know that there’s a variable called breadcrumb that I want to inspect. Twig has a function called dump() that will, you guessed it, dump all the variables on the page. Opening core/templates/Bartik/templates/, I can now add my debugging function…but which one? I can't just drop in a php var_dump into a template file anymore. See Twig for Template Designers for a list of IDEs that support Twig.)
(But, you can use whatever text editor or IDE you like, preferable one with some Twig support, like autocompleting all those double curly braces. (I did cringe a little bit at first, if that helps.)īy "hacking core" what I mean is: I’m going to navigate to core/themes/bartik/templates and open up file in my IDE, phpStorm. In this post, I just want to focus on debugging Twig in a local sandbox environment, so instead of spinning up a new theme, I am going to hack core in this tutorial.
Drupal devel dd update#
(TODO: Update Drush to a version that supports Drupal 8 on your local.) Hack Core (Really) While I’m at it, I’ll add this page to my shortcut menu by clicking the star next to the page title, because I haven’t got Drush updated yet. On my Drupal 8 site, I’ll navigate to Configuration > Performance and click the Clear all caches button. See Comments in Twig for Template Designers. A pound sign (#) enables you to comment out part of a line in Twig. * Remove the pound (#) sign at the beginning of the line. Un-comment* the line that contains the twig_debug setting so that. * Not recommended in production environments (Default: FALSE).
* For more information about debugging Twig templates, see * Note: changes to this setting will only take effect once the cache is
Drupal devel dd code#
* - Twig templates are automatically recompiled whenever the source code * - The dump() function can be used in Twig templates to output information When running automated tests, 'twig_debug' * - Note that this debugging markup will cause automated tests that directly * contain theming information, such as template file name suggestions.
* - The markup of each Twig template is surrounded by HTML comments that In settings.php, after searching for "Twig" I found the following section on Twig debugging: We’ll need to open up sites/default/settings.php to do that. The first thing we need to do is to turn on twig debugging. ( Link to change record.) Thanks to Cottser for the heads-up! It's in sites/ and the suggestion is to take that file and copy it into sites/default. In the latest development release, the twig_debug settings are no longer in settings.php. Update and important note! The following instructions work in the alpha version of Drupal 8 only. So, if Twig is totally new to you, don’t worry. In Drupal 8, the template engine is Twig, so we’re going to need to know a little bit of Twig to make this work. When I am theming a Drupal site, I need to know which variables are available on a template file.
Drupal devel dd how to#
In particular, check out Configure Your Environment for Theme Development for more comprehensive information about how to set up your local development environment for theming in Drupal 8, including Twig debugging. Check out our Drupal 8 Theming Guide for the latest information. Editor's note: This blog post was written during the Drupal 8 development cycle and probably contains out-of-date information.
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