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Metal Toad: Drupal 8: First Impressions for the Back-End Developer

di, 2014/11/18 - 12:54am
Drupal 8: First Impressions for the Back-End Developer Mon, 11/17/2014 - 15:54 keithdechant

Drupal 8 is in beta now, and recently I’ve had a chance to start working with it. While much of the admin interface is comparable to Drupal 7, there have been some important changes for site builders and back-end developers. In this post, I will be looking at file system and database structure changes, Drush setup, and the new configuration entity type.

Disclaimer: Drupal 8 beta 2 is not ready for production yet. If you start working with it, be warned that future beta releases might break backwards compatibility. You might need to write some code to upgrade. If this is not an option for you, you would be best served sticking with Drupal 7 until the Drupal 8 release candidate is available.

Content Types

One of the most noticeable changes to the Drupal 8 admin UI is the revised Content Type creation pages.

The “Manage Fields” page no longer contains a “widget” column. There is a new tab, “Form Display,” which allows more flexible configuration of the node add/edit form.

“Manage Fields” also no longer allows custom sorting of the fields. “Body” is always listed first, followed by the custom fields in alphabetical order. The fields can be reordered  on the “Manage Form Display” and “Manage Display” tabs.

Comments

In Drupal 8, comments are set up as a field, rather than a setting in the node type. To turn on comments for a content type, add a field of type "Comments" on the "Manage Fields" page. This is a more flexible system than in Drupal 7, allowing more than one type of comments for a single node.

This change mostly affects the admin UI. Comments are still entities in Drupal 8, and their underlying data structure is similar to Drupal 7.

Database structure

The notable changes in the database structure relate to the user profiles and the table names for field tables.

The “users” table (a single table in Drupal 7) has been split into “users” and “users_field_data” which contains the data from the built-in fields like name and password. Several other tables, including "node", "comment", and "taxonomy_term" have undergone similar structure changes. This restructuring allows for easier translations of data in the core fields.

Drupal 8 field tables now are prefixed with the type of entity they belong to. They have names like “node__field_image” or “user__field_first_name”. The data structure of these tables is similar to the Drupal 7 “field_data_*” tables, with only a few changes (e.g., the "language" column is now named "langcode").

Drush

Drush 6, commonly used with Drupal 7, is not compatible with Drupal 8. You will need to install Drush 7, which is still in development. Not to worry, it’s easy to install Drush 7 alongside Drush 6. Here is an excellent article about setting up Drush 7 with Drupal 8 using Composer: https://www.acquia.com/blog/leverage-drush-7-drupal-8

Cache and Registry

Cache and registry handling in Drupal 8 has undergone some major changes from Drupal 7. Notably, the “cache clear” command has been replaced by “cache rebuild.”

Drupal 7:
“drush cache-clear all”
(a.k.a. “drush cc all”)

Drupal 8:
"drush cache-rebuild”
(a.k.a., “drush cr”).

Note: In Drupal 8, you don't need to specify "drush cache-rebuild all." The "cache-rebuild" command appears to always clear all the caches, and any additional arguments are ignored.

Note: “drush cache-clear drush” is still used to update the list of Drush commands.

As of this writing, the “drush registry-rebuild” command does not appear to be supported for Drupal 8. This may change in the near future.

Package Management

Drupal 8 does not allow disabling of modules. The "drush pm-disable" command has been removed. To turn off a module, you need to uninstall it with "drush pm-uninstall" or by using the "Uninstall" tab on the "Extend" page in the admin UI.

As of Drupal 8 beta 2, uninstalling a module does not automatically delete the module's configuration data. However, some modules may have uninstall hooks which delete their configuration when they are uninstalled. Modules like these can no longer be uninstalled without deleting their configuration.

Package Manager bugs

As of this writing, there is a Drush 7 bug that causes an infinite loop when trying to use “drush pm-enable” (a.k.a., “drush en”) to simultaneously download and install a module:

https://github.com/drush-ops/drush/issues/5

The workaround is to download the module ("drush dl somemodule") and enable it ("drush en somemodule") in two separate steps, or to enable the module through the admin UI. This does not affect modules which you have already downloaded and wish to enable.

Compiled CSS, JS, and Twig files

In sites/default/files are several new directories:

  • sites/default/files/php - Contains compiled Twig templates
  • sites/default/files/css - Contains compiled and gzipped CSS files
  • sites/default/files/js - Contains compiled JS files

These files do not need to be added to your Git repository. Drupal will generate them automatically on page load, and they will have different file names on each machine (local dev machine, dev server, production server, etc.). Similarly, you shouldn’t try to edit these files manually because Drupal will automatically overwrite your changes at the next cache rebuild.

The Drush “cache-rebuild” command will erase these files and rebuild them.

Common errors - File permissions

Incorrect file permissions can cause PHP errors, or missing CSS or JS. Consider the following error:

Fatal error: Class '__TwigTemplate_09ab09ab7c23bd1ffe135ac9872354bdeca182f' not found in /path/to/your/site/drupal/core/lib/Drupal/Core/Template/TwigEnvironment.php on line 152

This error occurs when the web server doesn’t have permissions to write to the directory sites/default/files. Change the permissions or ownership on that directory and this error should go away.

If you encounter pages missing their CSS files, try checking the same file permissions.

Configuration Entities

Drupal 8 introduces a new type of entity, the “configuration entity.” These are represented as YAML files in the “config/install” subdirectory within a module. When the module is installed, the data from these YAML files is loaded into entries in the “config” table in the database.

The "config" table contains many of the settings that were formerly in the "system" table in Drupal 7. It also contains definitions for a number of things that were formerly in separate tables. Notable examples are Taxonomy vocabularies and text filter formats.

Config entities are only updated when the module is installed or uninstalled. Drupal does not rebuild them when you rebuild the cache. During module development, you either need to uninstall and reinstall your module, or use the config_devel contrib module to make managing your config entities easier.

Config entities are particularly useful when writing content migrations, because the migration definitions are config entities.

As of Drupal 8 beta 2, configuration entities are no longer removed when a module is uninstalled. If your custom module uses configuration entities, and you don’t want these to persist during a reinstall of the module, it might be a good idea to write an uninstall hook to remove the entities.

Example uninstall hook to remove configuration entities:

/** * Implements hook_uninstall(). * * Cleans up config entities installed by this module. */ function yourmodule_uninstall() { db_query("DELETE FROM {config} WHERE name = 'your.config.entity.name'"); drupal_flush_all_caches(); }
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Károly Négyesi: Adding comma separated username autocomplete to a D7 form

ma, 2014/11/17 - 10:20pm

Today I needed to add autocomplete to a field that could contain comma separated usernames and obviously the requirements included autocomplete. I thought this problem must be solved already in the ecosystem and sure, Views has it already. So I have added '#autocomplete_path' => 'admin/views/ajax/autocomplete/user', '#element_validate' => array('my_module_usernames_validate') and then

<?php
function my_module_usernames_validate(&$element) {
  if ($values = drupal_explode_tags($element['#value'])) {
    // Good thing Views doesn't use the native constructor.
    $handler = new views_handler_filter_user_name();
    // And this function doesn't use the object at all.
    $handler->validate_user_strings($element, $values);
  }
}
?>

Ps. This has been confirmed as working (with a plugin instance) in D8 too.

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Creative Juices: Building REST web services with Drupal 7

ma, 2014/11/17 - 7:48pm
Building REST web services with Drupal 7 Mon, 11/17/2014 - 13:48 matt
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Drupal core announcements: Drupal core security release window on Wednesday, November 19

ma, 2014/11/17 - 5:54am
Start:  2014-11-19 (All day) America/New_York User group meeting Organizers:  David_Rothstein

The monthly security release window for Drupal 6 and Drupal 7 core will take place on Wednesday, November 19.

This does not mean that a Drupal core security release will necessarily take place on that date for either the Drupal 6 or Drupal 7 branches, only that you should prepare to look out for one (and be ready to update your Drupal sites in the event that the Drupal security team decides to make a release).

There will be no bug fix release on this date; the next window for a Drupal core bug fix release is Wednesday, December 3.

For more information on Drupal core release windows, see the documentation on release timing and security releases, and the discussion that led to this policy being implemented.

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Gizra.com: Behat - The Right Way

zo, 2014/11/16 - 11:00pm

Behat is a wonderful tool for automatic testing. It allows you to write your user stories and scenarios in proper English, which is then parsed by Behat and transformed to a set of clicks or other operations that mimic a real user.

If you don't have automated tests on your project, I would argue that you're doing it wrong (I explain why on The Gizra Way presentation). Even having a single test is much better than none.

With that said, it's super easy to abuse Behat. We are developers and we think sort of like machines (not really, but you get my point). If you would like to test login to your site you could easily do

Given I visit "/user/login" # fill the username and password input fields, and click submit When I fill "username" with "foo" And I fill "password" with "bar" And I press "Login" Then I should get a "200" HTTP response

Your test will return green, but it could be improved:

Continue reading…

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Drupal Association News: Don't Miss the Blink Reaction Membership Discount

vr, 2014/11/14 - 11:09pm

At the Drupal Association, we love our members and want to show it. That’s why we team up with some of the best Drupal companies around every month to offer our members spectacular discounts.

This month, we’re pleased to announce that  Drupal Association Members can receive 30% off Blink Institute training classes from Blink Reaction. Using the discount code here, Drupal Association members can access fantastic training from Blink, led by veteran Drupalists who are expert trainers. Note: this offer can not be combined with other promotional offers.

Blink Reaction is a premiere provider of enterprise Drupal services to Fortune 1000 companies throughout the US. Their Drupal Training program is designed to help individuals, Enterprise service providers and small business owners harness the power of Drupal.

The Blink Training program has taught beginner and advanced methods to hundreds of individuals and corporations. Blink is proud to offer free and nearly free training through Global Drupal Training Days and at Drupal Camps alongside their public and private training offerings.

Make sure you take advantage of this great opportunity while it lasts. Kudos to our friends over at Blink -- thanks for sharing the Drupal love!

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Code Karate: Drupal 7 Imagefield Focus

vr, 2014/11/14 - 10:31pm
Episode Number: 178

In this episode we look at the Imagefield Focus Module. This module adds another option to the image styles on a content type field. With this module you are able to specify a focus and crop area of your image. Once you have selected either or both of those areas the module then resizes and focuses on the certain area you specified.

Tags: DrupalFieldsDrupal 7Image HandlingDrupal PlanetUI/Design
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Midwestern Mac, LLC: Creating a contact form programmatically in Drupal 8

vr, 2014/11/14 - 7:24pm

Drupal 8's expanded and broadly-used Entity API extends even to Contact Forms, and recently I needed to create a contact form programmatically as part of Honeypot's test suite. Normally, you can export a contact form as part of your site configuration, then when it's imported in a different site/environment, it will be set up simply and easily.

However, if you need to create a contact form programmatically (in code, dynamically), it's a rather simple affair:

First, use Drupal's ContactForm class at the top of the file so you can use the class in your code later:

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Drupal Association News: Happy Global Training Day!

vr, 2014/11/14 - 6:39pm

It's Global Training Day and we couldn't be more excited! All across the world, people are teaching and learning Drupal, and sharing that open source love.

Global Training Days happen once a quarter, and focus on one of two curriculums:

  • "Introduction to Drupal," a full day training on the basics of Drupal. Attendees will leave having successfully built a Drupal site. It is ideal for those interested in exploring Drupal as a career path.
  • "What is Drupal?" This half-day workshop will address the basics of Drupal, and will give an overview to those interested in evaluating or implementing Drupal.

Here are some of the highlights of today's Global Training Day tweets.

The first Global #Drupal Training Day Hungary is ON! @tanarurkerem and @kuszingjanos on the stage :) cc @DrupalAssoc pic.twitter.com/DGt1yvFuPg

— Zsófi M. (@zsofimajor) November 14, 2014

We are ready #drupalday!!! pic.twitter.com/ezIIl1aNHC

— Wellnet (@Wellnet) November 14, 2014

#DrupalCampMelbourne2014 Day 1 Group Photo in sunny Melbourne! pic.twitter.com/DgFh9Wcb7I

— Drupal Melbourne (@DrupalMelbourne) November 14, 2014

Where's Global Training Day happening? This map shows you where people are learning about Drupal all over the world.

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Paul Booker: How to create Blocks in Drupal 7

vr, 2014/11/14 - 6:28pm
// $Id$ /** * @file * Implements various blocks to improve pending content workflow. */ /** * Implements hook_block_info(). */ function approval_block_info() { $blocks['pending_comments'] = array( 'info' => t('Pending Comments'), 'status' => TRUE, 'region' => 'sidebar_first', 'weight' => 0, ); $blocks['unpublished_nodes'] = array( 'info' => t('Unpublished Nodes'), 'status' => TRUE, 'region' => 'sidebar_first', 'weight' => 0, ); return $blocks; } /** * Implements hook_block_configure(). */ function approval_block_configure($delta) { $form = array(); switch($delta) { case 'pending_comments': $form['pending_comment_count'] = array( '#type' => 'textfield', '#title' => t('Configure Number of Comments to Display'), '#size' => 6, '#description' => t('Enter the number of pending comments that will appear in the block.'), '#default_value' => variable_get('pending_comment_count', 5), ); break; case 'unpublished_nodes': $form['unpublished_node_count'] = array( '#type' => 'textfield', '#title' => t('Configure Number of Nodes to Display'), '#size' => 6, '#description' => t('Enter the number of unpublished nodes that will appear in the block.'), '#default_value' => variable_get('unpublished_node_count', 5), ); break; } return $form; } /** * Implements hook_block_save(). */ function approval_block_save($delta = '', $edit = array()) { switch($delta) { case 'pending_comments': variable_set('pending_comment_count', (int)$edit['pending_comment_count']); break; case 'unpublished_nodes': variable_set('unpublished_node_count', (int)$edit['unpublished_node_count']); break; } return; } /** * Implements hook_block_view(). */ function approval_block_view($delta = '') { switch ($delta) { case 'pending_comments': $block['subject'] = t('Pending Comments'); $block['content'] = approval_block_contents($delta); return $block; break; case 'unpublished_nodes': $block['subject'] = t('Unpublished Nodes'); $block['content'] = approval_block_contents($delta); return $block; break; } } /** * A module-defined block content function. */ function approval_block_contents($delta) { switch ($delta) { case 'pending_comments': if (user_access('administer comments')) { $nbr_comments = variable_get('pending_comment_count'); $result = db_query("SELECT cid, subject FROM {comment} WHERE status = 0 limit $nbr_comments"); $items = array(); foreach ($result as $row) { $items[] = l($row->subject, 'comment/'.$row->cid.'/edit'); } return array('#markup' => theme('item_list', array('items' => $items))); } break; case 'unpublished_nodes': if (user_access('administer nodes')) { $nbr_nodes = variable_get('unpublished_node_count'); $result = db_query("SELECT nid, title FROM {node} WHERE status = 0 limit $nbr_nodes"); $items = array(); foreach ($result as $row) { $items[] = l($row->title, 'node/'.$row->nid.'/edit'); } return array('#markup' => theme('item_list', array('items' => $items))); } break; } } Tags: URL: paulbooker / gist:5420976
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Paul Booker: How to create an autocomplete form element in Drupal 7

vr, 2014/11/14 - 5:22pm
<?php function demo_menu() { $items['demo-autocomplete-test'] = array( 'title' => 'Test autocomplete', 'page callback' => 'drupal_get_form', 'page arguments' => array('demo_form'), 'access arguments' => array('view published content'), 'type' => MENU_NORMAL_ITEM, ); $items['demo-autocomplete-engine'] = array( 'page callback' => 'demo_autocomplete', 'access arguments' => array('view published content'), 'type' => MENU_CALLBACK, ); return $items; } function demo_form($form, &$form_state) { $form = array(); $form['colors'] = array( '#title' => t('Colors'), '#type' => 'textfield', '#maxlength' => 60, '#autocomplete_path' => 'demo-autocomplete-engine', ); $form['submit'] = array( '#type' => 'submit', '#value' => 'Submit', ); return $form; } function demo_autocomplete($text) { $results = array(); $query = db_select('colors', 'c'); $query ->condition('c.color', '%' . db_like($text) . '%', 'LIKE') ->fields('c', array('color')) ->orderBy('color', 'ASC'); $colors = $query->execute(); foreach ($colors as $row) { $results[$row->color] = check_plain($row->color); } drupal_json_output($results); } Tags:
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MariqueCalcus: Prius is in Beta like Drupal :-)

vr, 2014/11/14 - 5:05pm

Alongside the long awaited Drupal 8 Beta release, we have also updated our first Drupal 8 theme. We haven't include many new features but we have tried to clean up its code and have improved our starter kit. Anyway, let's dig into the latest new features we have discovered with the first Beta releases of Drupal 8. Feel free to check out the code on drupal.org or read our dedicated blog entry if you want to find out more about our first Drupal 8 theme. If you can wait to see the result, take a look at our online demo.

Read More...
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Blue Drop Shop: Failing is Important: Drupal Camp A/V Kit Update

vr, 2014/11/14 - 3:17pm

When I learned BADCamp wasn't going to be recording sessions, I jumped at the chance to field-test the camp record kits I'm working on. After all, I was confident I fixed the audio equation and was going to start talks with the Drupal Association about next steps.

The current recipe for the kit is a Hauppage HD Rocket PVR for the screen capture and the Zoom H2N voice recorder as the microphone. Add to that a handful of dongles and converters to cover HDMI in/out for the PVR, and you're good to go.

Walking in to BADCamp, I was feeling great. I'm a big advocate for session records and I would be covering three rooms. Pretty cool, right? 

Wrong.

Throughout day one of sessions, a couple laptops had connection issues and had to bypass recordings, but overall things appeared to be going smoothly. It wasn't until the end of the day when copying files off the thumb drives that I noticed many recordings were 0k mp4 files, primarily from the main room. This was the most disconcerting, because every indication was that things were working.

On this, I have a couple ideas, but no solid understanding of why the files didn't write. That was the easiest room in terms of handshake between PVR and projector, plus there was a dedicated A/V crew that was helping hook up laptops.

When we tested at Fox Valley's camp, the laptop was typically disconnected by the time I made it to the rooms to swap out equipment. I suspect that disconnecting the device before hitting the stop button and waiting long enough for the files to write may kill the save. This one will be easy to test.

Projectors were also an issue. In the main space, none were HD and all were different flavors of Sony. Some hooked up just fine, while others squeezed the output. The Saturday-only keynote room was loving it. 

And then there were presenter laptop issues. There were a few older VGA-only laptops. One refused to work with the VGA to HDMI converted, while one worked for about 15 minutes before failing off and on, mid-presentation. One of the A/V techs suggested that maybe there is not enough USB power on the laptops to handle both the PVR and the converter, so a powered USB hub may be in order. Most Macbooks were fine, but a handful gave output with a very green tint to it.

No surprise, HDMI in/out is proving to be more of a hurdle than originally anticipated. In addition to HDMI in, the PVR also has an option to accept component video. It's likely that converting VGA out from a laptop to component video in to the PVR will be a safer bet. So the question becomes whether I can convert the HDMI out of the PVR to VGA for the projectors.   

All in all, this was an enormous fail. That said, this was the absolute best time for it to happen. My goal is to build a system that can handle the majority of the random that a camp will throw at it. 

I'm looking forward to testing the next iteration.

Tags:
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Tyler Frankenstein: Build a Mobile App to Geo Locate Nearby Places with Drupal

vr, 2014/11/14 - 1:30pm

In this tutorial (for DrupalCamp Ohio 2014) we'll explore how to build a mobile application and website that can geo locate places near our current position. The nearby location results will be displayed on a map, and will allow us to click on a result item to view its complete details.

The website will be powered by Drupal 7. The mobile application will be built using DrupalGap, which is powered by PhoneGap and jQuery Mobile. Let's get started!

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InternetDevels: Welcome us in Lviv! New office of InternetDevels company

vr, 2014/11/14 - 1:11pm

Long time ago in a galaxy far far away… Hold on, it was precisely 7 years ago, 15 November, 2007 in Lutsk, when the InternetDevels Drupal development studio was founded. The company has made a long way since then: overcomed lots of obstacles to gain the respected position at web development market; established number of contacts and connections; made significant contribution to the world’s Drupal community; taken over new development technologies, like Symfony framework… But there’s always something to do!

Read more
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