Beginning Drupal 8

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Chapter 11 Drupal Modules Drupal is an amazing product in its off-the-shelf state. The features and functionality provided in Drupal 8 core are often more than adequate to meet the needs of many who build their websites with Drupal. But there are times when you need a feature that isn’t possible with Drupal core alone, and in those cases you need look no further than the thousands of contributed modules that have been written to address just about anything you could think of doing on a Drupal based website. In this chapter you will learn how to find, install, enable, and configure contributed modules. Finding Contributed Modules A Drupal-contributed module is essentially a program or set of programs that expands Drupal’s capabilities beyond what is available in Drupal core. Contributed modules are designed, developed, and provided to the Drupal community free of charge by one or more of the thousands of developers who actively participate in the Drupal community. Modules can be downloaded from Drupal.org and enabled through the module administration pages. I will cover the process for adding modules in detail in a few moments. A contributed module can be as simple as providing a mechanism to automatically create the title of an article or as complex as a fully featured e-commerce storefront with product management, inventory management, order management, shipment management, credit card processing, customer management, and returns management. There are thousands of modules of every shape and size, covering a wide variety of topics. To find a contributed module, visit www.drupal.org/project/project_module and browse through the categories of modules in the “Module categories” drop-down list. Example categories include the following (the parenthetical number after the category represents the number of modules available for that category at the time of writing): • Administration (1,410) • Commerce/Advertising (653) • Community (687) • Content (2,370) • E-commerce (1,109) • Import/Export (496) • Mobile (176)Multilingual (244) • Performance and Scalability (379) • User Management (540) • Third-party Integration (2,302) • Utility (2,393) 127
Chapter 11 ■ Drupal Modules As you can see from these examples, there are thousands of modules that span a wide variety of categories. The general titles of the categories listed here often do not do justice to the rich features that are available in the modules that are buried beneath the titles. It often takes research and patience to scan through the hundreds of modules to find the one that provides the functionality that you need. Complex requirements may also take more than one module to provide the functionally you need to address a larger problem. Understanding which modules do what, which modules work well together, and which modules do not work together is often the hardest challenge of building a complex Drupal website. A recommended exercise is to visit www.drupal.org/project/project_module, select the “Last release” sort option for the “Sort by” field, and then click the Search button. The list displayed will show the latest modules and module updates that have been released to the community. Visit the site every day or two and read through the description of the newest modules that were added or updated on the site. It only takes a couple of minutes a day to quickly build up your understanding of the modules and types of solutions that are available through Drupal’s contributed modules. A great third-party website that helps solve the issue of finding the right modules is http://drupalmodules.com. This site provides a Search with Module Finder feature that makes it easier to look for and find the right module for the right job. Downloading and Installing a Module There are three basic approaches for installing a new module on your site: downloading the module files to your server, using the “Install new module” feature on the module administrative interface, or using Drush. I’ll cover the first two methods in this chapter and cover using Drush in Chapter 15. The first step in installing a module is finding the right module to use. As described in the previous section, there are thousands of modules to pick from; finding the right one is often the biggest challenge. For demonstration purposes, let’s pick two of the most popular and useful modules: the Google Analytics module and the Display Suite module. First we’ll download the Google Analytics module by downloading its files to the server, and then we’ll download the Display Suite module using the section approach, via the “Install new module” feature. Downloading Module Files to Your Server I’ll demonstrate how to install the Google Analytics module by downloading the module file to the module directory on my Drupal 8 site. The steps are as follows: 1. Visit Drupal.org/project/modules and find the module. You can use the Search feature or the filters on the Modules page to locate a module, but knowing that Drupal.org’s standard naming convention for the URLs of modules is to use the name of the module as the last element of the URL speeds the search for the Google Analytics module: visit www.drupal.org/project/google_analytics. 2. Scroll down to the Downloads section for the module. You should, in most cases, select the current release for the module that you are installing. The current release should be highlighted with a green background. In some cases, you may need to use a module that is still in development because a stable production version is not yet available. Development versions are typically highlighted with a red background and have a version number that ends in -dev. You should use preproduction (dev) versions with caution, as those modules are not yet fully developed and have not been thoroughly tested. To download a module rightclick the tar.gz link for the Drupal 8 version (8.x), and click the Save option provided by your browser in the pop-up menu. If your Drupal 8 installation is 128
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Beginning Drupal 8 Todd Tomlinson
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There are so many people to thank f
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■ Contents at a Glance ■Chapter
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■ Contents Authoring Information
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■ Contents ■Chapter ■ 8: Drup
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■ Contents ■Chapter ■ 13: Mul
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■ Contents Updating the Article C
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■ Contents Moving the Drupal Dist
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About the Technical Reviewer Clive
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Introduction In its relatively shor
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Chapter 1 ■ Introduction to Drupa
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Chapter 2 Creating and Managing Con
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Chapter 2 ■ Creating and Managing
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Chapter 3 Creating and Managing Use
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Chapter 4 ■ Taxonomy “individua
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Chapter 4 ■ Taxonomy Figure 4-3.
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Chapter 4 ■ Taxonomy Clicking the
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Chapter 4 ■ Taxonomy If you happe
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Chapter 5 ■ Content Types • Hav
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Chapter 5 ■ Content Types The fir
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Chapter 6 ■ Using Drupal Themes S
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Chapter 16 ■ Using Git Git recogn
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Chapter 16 ■ Using Git This will
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Chapter 17 Putting It All Together
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Chapter 17 ■ Putting It All Toget
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Chapter 17 ■ Putting It All Toget
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Summary Chapter 17 ■ Putting It A
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Chapter 18 ■ Creating a Responsiv
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Chapter 19 ■ Creating a Blog Site
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Chapter 20 ■ Building a Company S
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Chapter 21 ■ Building a Community
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Chapter 22 ■ Building a Commerce
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Appendix A ■ Installing Drupal Se
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Appendix A ■ Installing Drupal Ne
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Appendix A ■ Installing Drupal Co
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Appendix B Additional Resources As
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Video Tutorials Appendix B ■ Addi
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■ index Blog site (cont.) theme,
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■ index Drupal users groups (cont
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■ index • S Security patches,
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