In this article we are going to look at how we can render images using image styles in Drupal 8.
In Drupal 7, rendering images with a particular style (say the default "thumbnail") was by calling the theme_image_style() theme and passing the image uri and image style you want to render (+ some other optional parameters):$image = theme('image_style', array('style_name' => 'thumbnail', 'path' => 'public://my-image.png'));
You'll see this pattern all over the place in Drupal 7 codebases.
The theme prepares the URL for the image, runs the image through the style processors and returns a themed image (via theme_image()). The function it uses internally for preparing the url of the image is image_style_url() which returns the URL of the location where the image is stored after being prepared. It may not yet exist, but on the first request, it would get generated.
So how do we do it in Drupal 8?
First of all, image styles in Drupal 8 are configuration entities. This means they are created and exported like many other things. Second of all, in Drupal 8 we no longer (should) call theme functions like above directly. What we should do is always return render arrays and expect them to be rendered somewhere down the line. This helps with things like caching etc.
So to render an image with a particular image style, we need to do the following:$render = [ '#theme' => 'image_style', '#style_name' => 'thumbnail', '#uri' => 'public://my-image.png', // optional parameters ];
This would render the image tag with the image having been processed by the style.
Finally, if we just want the URL of an image with the image style applied, we need to load the image style config entity and ask it for the URL:$style = \Drupal::entityTypeManager()->getStorage('image_style')->load('thumbnail'); $url = $style->buildUrl('public://my-image.png');
So that is it. You now have the image URL which will generate the image upon the first request.
Remember though to inject the entity type manager if you are in such a context that you can.
How to build a Docker Pattern Lab image for local Drupal development with the Pattern Lab Starter theme and/or with other common front-end applications such as npm, Gulp, and Bower. Continue reading…
This module provide functionality to login with mobile number.It is very simple to use.
This module requires the following modules:
* Install as you would normally install a contributed Drupal module. See:
for further information.
A Migrate Source Plugin to import files from a directory path in to Drupal Files.
Plugin Definition:source: constants: uri_file: 'public://' #required plugin: directory track_changes: true urls: - /path/to/files/for/import file_extensions: - mp3 - m4a - wav recurse_level: -1
This plugin provides the following fields:
Drupal.org is home of the Drupal project and the Drupal community. It has been continuously operating since 2001. The Engineering Team— along with amazing community webmasters— keeps Drupal.org alive and well. As we launch the first membership campaign of 2017, our story is all about this small and productive team.
Join us as we celebrate all that the engineering team has accomplished. From helping grow Drupal adoption, to enabling contribution; improving infrastructure to making development faster. The team does a lot of good for the community, the project, and Drupal.org.
Check out some of their accomplishments and if you aren't yet a Drupal Association member, join us! Help us continue the work needed to make Drupal.org better, every day.
Share these stories with others - now until our membership drive ends on March 8.
Thank you for supporting our work!
We started regular Drupal usability meetings twice a week almost a year ago in March 2016. That is a long time and we succeeded in supporting many key initiatives in this time, including reviews on new media handling and library functionality, feedback on workflow user experience, outside-in editing and place block functionality. We helped set scope for the changes required to inline form errors on its way to stability. Those are all supporting existing teams working on their respective features where user interfaces are involved.
However, we also started to look at some Drupal components and whether we can gradually improve them. One of the biggest tasks we took on was redesigning the status page, where Drupal's system information is presented and errors and warnings are printed for site owners to resolve. While that looks like a huge monster issue, Roy Scholten in fact posted a breakdown of how the process itself went. If we were to start a fresh issue (which we should have), the process would be much easier to follow and would be more visible. The result is quite remarkable:
Now that Drupal 8.3 is in beta, it is time to look at progress around core initiatives again and see how you can help move one or more of them forward. Once again I asked initiative contributors to help compile this post to inform you all of progress across the board. This is just a sampling of some improvements, there are a lot more that we could not cover here.Default content and new core theme
The default content and new core theme teams decided to join forces because the goals are intertwined. The teams found it hard to demonstrate good default content without a supporting visual look and vice versa. The plan to go with a farmer's market site changed to a more general publication site, but that still allows for plenty of things to showcase. We are looking for a designer / art director for the project (deadline today!).
The media team held a sprint in Berlin in December. Unfortunately none of these media improvements landed in Drupal 8.3, however we are very close to complete the base media functionality early in Drupal 8.4. There was significant progress on the visual media library too. Next step is to finalise the plugins for images, documents and oEmbed.
Join in the #drupal-media channel on IRC.Migrate
The Migrate API became beta in Drupal 8.2.x with 8.2.5 and will apply to 8.3.0 as well. On the other hand other parts of the migration system like the Migrate Drupal API are still alpha stability and received some big updates. Two huge additions are the migration path for Drupal 7 node translations to Drupal 8 content translation and support added for configuration translations (and implemented initially for user profile fields).
Join in the #drupal-migrate channel on IRC.Multilingual
Most of the recent progress on the multilingual initiative was in collaboration with the migration team and that is still heavily ongoing. Further feature development around multilingual features is not on the table currently, as most contributors moved on to more pressing areas given the advances achieved in multilingual with Drupal 8 already. Therefore it is being proposed to officially remove the multilingual initiative from the list.PHPUnit
The work in the PHPUnit initiative is focusing on converting a large part of old Simpletest web tests to PHPUnit based browser tests. The goal is to commit a larger patch on February 21st to the Drupal 8.3.x branch. After that one third of Drupal core’s web tests would be converted to PHPUnit browser tests. We are also discussing the timeline for deprecating Simpletest.
If you want to convert your tests in your contrib / custom module, please read the PHPUnit browser test tutorial and help out on https://www.drupal.org/node/2794285 in case you run into problems. Please follow the PHPUnit initiative issue for status updates. Join us in IRC in #drupal-phpunit.
(This update written by klausi & dawehner)Workflow
The biggest user facing change with workflows since the last update is the introduction of the Workflows module as a separate concept from content moderation. Now other modules can use workflows for user levels, commerce and other needs as well, when the workflow has nothing to do with content moderation. Many API changes were also made including support for moderation of non-translatable entity types and entity types without bundles (as long as revisions are enabled). Publishing entities implementing EntityPublishedInterface is also possible now, not just nodes.
Wondering how to join an initiative? Meeting information for each initiative is listed at https://groups.drupal.org/node/514585
Drupal core announcements: A big chunk of old tests using WebTestBase wil be converted to PHPUnit BrowserTestBase on Feb 21st
As part of the PHPUnit initiative a considerable part of Simpletests will be converted to PHPUnit based browser tests on February 21st 2017. A backwards compatibility layer has been implemented so that many Simpletests can be converted by just using the new BrowserTestBase base class and moving the test file. There is also a script to automatically convert test files in the conversion issue.
Developers are encouraged to use BrowserTestBase instead of Simpletest as of Drupal 8.3.0, but both test systems are fully supported during the Drupal 8 release cycle. The timeline for the deprecation of Simpletest's WebTestBase is under discussion.
Some times you want to disable big pipe, for example to make sure you can set breakpoints in JS files in attached libraries. Just drop in this module and enable it in settings.php like so:$settings['big_pipe_override_enabled'] = TRUE;
When changing this value, you should clear the cache.
This blog is all about How Drupal handles the Mail system & the stages it has to go through.
In Drupal to sends an email we need to take care of two rules
- Declare all the required properties under hook_mail().
- Call drupal_mail() with argument for actually sending the email
However in the scenario like bigger & complex site the above steps won’t be enough. But Drupal gives us a Flexibility to customize email sending process, before that it’s necessary to know how stuff works behind the scenes first. In this article I’ll show you how you can customize and extend the Drupal mail system to fulfill your needs.
While sending an email drupal_mail() function uses system class for…
With the ever growing Drupal Community, a beginner is many a times lost in the vast number of resources, with increasing number of developers in Valuebound, I spoke to some of the seasoned developers on their opinion about the skills that a Drupal developer should have and also sifted through tons of materials from Stackoverflow and some more places.
The skillset that we are discussing here will give a clear idea about where you stand, what you know, what you do not know and of course fill me up with what I have missed, and I will quickly add up the suggestions. Before this I have …
There's no shortage of generic web performance optimization advice out there. You probably have a checklist of things to do to speed up your site. Maybe your hosting company sent you a list of performance best practices. Or maybe you use an automated recommendation service.
You've gone through all the checklist compliance work, but haven't seen any change in your site's speed. What's going on here? You added a CDN. You optimized your image sizes. You removed unused code. You even turned off database logging on your Drupal site and no one can read the logs anymore! But it should be worth it, right? You followed best practice recommendations, so why don't you see an improvement?
Here are three reasons why generic performance checklists don't usually help, and what really does.1. Micro-Optimizations
Generic performance recommendations don't provide you with a sense of scale for how effective they'll be, so how do you know if they're worth doing?
People will say, "Well, if it's an improvement, it's an improvement, and we should do it. You're not against improvements are you?" This logic only works if you have infinite time or money. You wouldn't spend $2000 to make changes you knew would only save 1ms time on a 10s current page load.
Long performance checklists are usually full of well-meaning suggestions that turn out to be micro-optimizations on your specific site. It makes for an impressive list. We fall for it because it plays into our desire for completion. We think, "ROI be damned! There's an item on this list and we have got to do it."
Just try to remember: ABP. Always Be Prioritizing.
You don't have to tackle every item on the list just for completion's sake. You need to measure optimizations to determine whether you're adding a micro-optimization or slaying a serious bottleneck.2. Redundant Caching
In security, the advice is to add more layers of protection. In caching, not so much. Adding redundant caching will often have little to no effect on your page load time.
Caching lets your process take a shortcut the majority of the time. Imagine a kid who takes a shortcut on her walk to school. She cuts through her neighbor's backyard instead of going around the block. One in 10,000 times, there's a rabid squirrel in the yard, so she takes the long way. Her entrepreneurial friend offers to sell her a map to a new shortcut. It's a best practice! It cuts off time from the original full route that she almost never uses but it's longer than her usual shortcut. It will save her a little time on rabid squirrel days. Is it worth the price?
The benefit of a redundancy like this is marginal, but if there's a significant time or cost investment it’s probably not worth it. It's better to focus on getting the most bang for your buck. Keep in mind that the time involved to add caching includes making sure that new caches invalidate properly so that your site does not show stale content (and leave your editors calling support to report a problem when their new post does not appear promptly.)3. Bottlenecks or Bust
The first step to effective performance optimization is to determine which layer is slow. It may be both. Developers tend to optimize the layer of their expertise and ignore the other one. It's common to focus efforts on the wrong layer.
Now on the back-end, a lot of the process occurs in series. One thing happens, and then another. First the web server routes a request. Then a PHP function runs. And another. It calls the database with a query. One task completes and then the next one begins. If you decrease the time of any of the tasks, the total time will decrease. If you do enough micro-optimizations, they can actually add up to something perceptible.
But the front-end, generally speaking, is different. The browser tries to do many things all at the same time (in parallel). This changes the game completely.
Imagine you and your brother start a company called Speedy Car Cleaning. You want your customers to get the fastest car cleaning possible, so you decide that while you wash a car, your brother will vacuum at the same time. One step doesn't rely on the other to be completed first, so you'll work in parallel. It takes you five minutes to wash a car, and it takes your brother two minutes to vacuum it. Total time to clean a car? Five minutes. You want to speed things up even more, so your brother buys a more powerful vacuum and now it only takes him one minute. What's the new total time to clean a car?
If you said five minutes, you are correct. When processes run in parallel, the slowest process is the only one that impacts total time.
This is a lesson of factory optimization as well. A factory has many machines and stations running in parallel, so if you speed up the process at any point that is not the bottleneck, you'll have no impact on the throughput. Not a small impact - no impact.Ok, then what can we do?
So is it worthless to follow best practices to optimize your speed? No. You might get lucky, and those optimizations will make a big impact. They have their place, especially if you have a fairly typical site.
But if you don't see results from following guesses about why your site is slow, there's only one sure way to speed things up.
You have to find out what's really going on.
Establish a benchmark of current performance. Determine which layer contributes the most to the total time. Use profiling tools to find where the big costs are on the back-end and the bottlenecks on the front-end. Measure the effects of your improvements.
If your site's performance is an issue, ask an expert for a performance audit. Make sure they have expertise with your server infrastructure, your CMS or framework, and front-end performance. With methodical analysis and profiling measurements, they'll get to the bottom of it. And don't sweat those 'best practice' checklists.
Learn how to contextually output field data in Drupal Commerce with the Product Display tool. YouTube Video Tutorial included for e-commerce projects.
This module allows per-entity workflow participants to be configured. These
participants can either be editors or reviewers. Content moderation states can
be configured to allow editors, reviewers, or both, to make transitions. Reviewers
cannot edit the content, only moderate. Editors can moderate and make changes.