Drupal 6 Essential Training
Illustration by Don Barnett

Finding modules


From:

Drupal 6 Essential Training

with Tom Geller

Video: Finding modules

If you have been impressed by Drupal's default installation, hold on to your seats because there is a lot more available for Drupal to extensions that are known as Modules. The central repository for all Drupal Modules is, like some many other things for Drupal, at drupal.org. Once on the site click on the Download tab and then on Modules. Hundreds of Modules are available here all for free. Let us take at some of the ways they extend Drupal's functionality. When you first arrive at the Modules page you will notice a list of categories for the different modules. The number next to them tells you how many of that particular category there are. However I should mention that these are for all versions of Drupal and a module that is written for version four or five would not work for version six.
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  1. 4m 36s
    1. Welcome
      49s
    2. Using the example files
      3m 47s
  2. 28m 50s
    1. Drupal is a CMS
      7m 43s
    2. Choosing Drupal
      5m 31s
    3. Checking Drupal's requirements
      4m 26s
    4. Understanding the inner workings of Drupal
      4m 32s
    5. Meeting the Drupal community
      6m 38s
  3. 11m 26s
    1. Learning key terms in Drupal
      5m 19s
    2. Touring Drupal's interface
      6m 7s
  4. 34m 28s
    1. Installing WAMP and Drupal on Windows
      9m 41s
    2. Installing MAMP
      4m 34s
    3. Setting up the database on a Mac
      2m 1s
    4. Downloading and installing Drupal on a Mac
      6m 32s
    5. Troubleshooting installation problems
      3m 49s
    6. Automating updates with cron
      7m 51s
  5. 25m 34s
    1. Setting up clean URLs
      5m 51s
    2. Backing up your Drupal site
      3m 31s
    3. Restoring your Drupal site from backup
      4m 18s
    4. Wiping your Drupal installation clean
      2m 6s
    5. Updating Drupal
      9m 48s
  6. 15m 35s
    1. Using the Administration menu
      6m 20s
    2. Setting site information
      4m 50s
    3. Setting the theme
      4m 25s
  7. 35m 6s
    1. Understanding security and permissions
      7m 2s
    2. Controlling site access with user management
      3m 39s
    3. Creating users
      7m 57s
    4. Setting user profiles
      9m 40s
    5. Creating contact forms
      6m 48s
  8. 19m 18s
    1. Creating your site's basic info pages
      7m 12s
    2. Understanding page layout
      5m 40s
    3. Creating a flexible layout with blocks
      6m 26s
  9. 15m 34s
    1. Monitoring performance
      4m 51s
    2. Recovering from disasters
      7m 37s
    3. Improving administration skills
      3m 6s
  10. 41m 1s
    1. Understanding nodes
      6m 49s
    2. Creating basic content: Stories and pages
      7m 9s
    3. Enabling other content types
      9m 22s
    4. Adding blogs
      3m 48s
    5. Adding forums
      6m 56s
    6. Adding polls
      6m 57s
  11. 34m 48s
    1. Exploring content categories
      7m 44s
    2. Exchanging content via RSS
      9m 47s
    3. Using input filters
      7m 40s
    4. Managing comments
      9m 37s
  12. 38m 5s
    1. Configuring your theme
      11m 27s
    2. Changing your theme's graphics
      4m 59s
    3. Finding and installing a new theme
      8m 56s
    4. Understanding Cascading Style Sheets (CSS)
      5m 56s
    5. Deciphering CSS files
      6m 47s
  13. 22m 38s
    1. Finding modules
      6m 52s
    2. Unpacking and installing modules
      6m 29s
    3. Configuring modules
      3m 49s
    4. Implementing complex modules
      5m 28s
  14. 32m 10s
    1. Ensuring automated updates with poormanscron
      3m 10s
    2. Defining custom content types with CCK
      12m 53s
    3. Stopping spam using a CAPTCHA
      10m 43s
    4. Using a WYSIWYG text editor
      5m 24s
  15. 22m 18s
    1. Getting around with multilevel menus
      7m 26s
    2. Building custom menus
      5m 42s
    3. Creating easy-to-navigate books
      9m 10s
  16. 20m 18s
    1. Changing page templates with PHP
      8m 15s
    2. Using PHP in content
      5m 20s
    3. Implementing PHP snippets
      6m 43s
  17. 10m 14s
    1. Launching your site
      5m 51s
    2. Joining the Drupal community
      4m 23s
  18. 15s
    1. Goodbye
      15s

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Watch the Online Video Course Drupal 6 Essential Training
6h 52m Beginner Aug 25, 2008

Viewers: in countries Watching now:

Drupal is a free, open-source content management system (CMS) for a variety of platforms. It has a robust user community and easy-to-use administration features. Drupal Essential Training covers all the important aspects of installing, configuring, customizing, and maintaining a Drupal-powered website. Instructor Tom Geller explores blogs, discussion forums, member profiles, and other features while demonstrating the steps required to make Drupal perform. He also teaches fundamental concepts and skills along the way, including installation, backups, and updates; security and permissions; flexible page layouts and CSS; menu navigation; and performance monitoring and disaster recovery. He also discusses how to select and install the community-supported modules that further expand Drupal's capabilities, and gives experienced PHP programmers tips on customizing page templates. Example files accompany the course.

Topics include:
  • Understanding the inner workings of Drupal
  • Creating stories, pages, blogs, forums, and polls
  • Managing users and comments
  • Setting and customizing themes
  • Exchanging content via RSS
  • Stopping comment spam with a CAPTCHA
  • Launching a site and joining the Drupal community
Subject:
Web
Software:
Drupal
Author:
Tom Geller

Finding modules

If you have been impressed by Drupal's default installation, hold on to your seats because there is a lot more available for Drupal to extensions that are known as Modules. The central repository for all Drupal Modules is, like some many other things for Drupal, at drupal.org. Once on the site click on the Download tab and then on Modules. Hundreds of Modules are available here all for free. Let us take at some of the ways they extend Drupal's functionality. When you first arrive at the Modules page you will notice a list of categories for the different modules. The number next to them tells you how many of that particular category there are. However I should mention that these are for all versions of Drupal and a module that is written for version four or five would not work for version six.

However, most modules that are built for 6.1 will work for 6.2 and continuing on up. I would be sure to filter by Drupal core compatibility however. You can do that up here, but first you must log on. I am going to do using an account we created. I suggest that you do the same by creating an account. You can do so by clicking on this Create New Account link, but for right now we are going to log in ourselves. Now we are logged in and as you can see we can filter by Core compatibility. I go down to 6.x and say Filter. You will notice the number of modules available has changed. I should mention that some modules fit in more then one category.

For example, a module that protect against user abuse, might be find in both Security and User management. You can find a specific module by going up to the search box bar and searching for it. Let us look for bitcache, which I happen to know is the name of one of the modules. And there it is however we should mention that sometimes drupal.org will turn off the search box when the load is too high. So we will go instead to Google search for bitcache and if you want to search just on the Drupal site you can do site: drupal.org.

And there it is. If you want to be even more specific you can say, search for drupal.org/project. That will leave out some of the pages that might be for example in documentation. But let us go back to the drupal.org page and take a look at some of those categories. To get there again we go to drupal.org/project/modules. Most of these categories are self explanatory. I am going to talk about some that are not quite as clear to the first time user. The first one is CCK. This refers to something called the Content Construction Kit which lets you create your own Content types with special type of fields for example, for location or time or date. We will be talking about that more in a separate video. A second category whose name is not completely obvious is Organic Groups. Organic Groups allow members to create their own online clubs.

For example individual members of a site about cars might set up affinity groups for owners of electric vehicles or thunderbirds. This is a common feature of such popular non-Drupal sites such as Facebook, Myspace, triab.net and Live Journal. Another category that is not completely obvious to the first time user is paging. Modules in the paging category change the way the pages are displayed and many of the modules in here are also in the content display category. The RDF category stands for Resource Description Framework. This is a very geeky system for data sharing and you almost certainly would not be using these modules unless you are already an Advanced Developer or Data Manager.

Finally there is a category called Views. Views offer different ways to display information from multiple nodes in an organized way. We will be showing you how to use views in another video. Let me show you an example of what a module can do. For this I am going to go to my own web site, savemyhomebook.com and from there I am going to go to Events. On this site a keep a calendar of upcoming events and as you scroll down you can see that I have a speaking engagement on the 23rd. When you click on that it goes to a note that describes more about that speaking engagement. This entire calendar was created using a module. The module itself is called calendar. Let us go there now. We will go back to our Modules page and find it in Content display. As we scroll down on this page, there it is.

We can find out more about the module by clicking on Find Out More or of course we could download it directly from that download link. I do recommend that you read up on the module before you download and install it because unlike themes modules can actually cause some real problems with your site. Further some modules are not completely obvious about how they work, that is they do not have a clear interface within Drupal. You may have to download other modules to expose what that first module does. So reading up is a good idea. Finally for any of these modules you should scroll down and make sure that the compatibility is what you want, what you are looking for is an up to date module that is not still in development that is it is been released it is been tested by the people who have programmed it and by it user.

We will scroll down on this one and make sure and this one in fact is in beta. There are few different levels there is beta, alpha, RC which stands for Release Candidate and DEV which stands for Development. As a guide the Developers will put a check mark if they feel that it is ready for prime time that is if it is safe to download and install. If they are not really sure they might put one of these warning triangles and if they feel that this it is not supported any more or might be dangerous to use they will put it in red. So be careful of those.

When you are looking at modules you might be overwhelmed by the selection that you have. So, which one should you use ? Well there are two ways to find out. First you can look for modules only when you have a specific problem that you want to solve. Second you could consider the most popular out there and those that are recommended by the other people and for that I recommend the web site drupalmodules.com. There you will find a directory of top favorites that is the once that people have said I like this the most and those that have been downloaded the most. But for now let us go back to our web site. Once you start dipping in to the pool of modules you will come to see Drupal's default installation as being only a very bare bones plot of lands on which to build your castle.

I encourage you to experiment with modules but, and I have to emphasis this, only on a test site. Some modules can conflict which each other and in any case adding lots of unnecessary modules will complicate your site both from the users prospective and from yours. But on your test site be bold and make backups.

Find answers to the most frequently asked questions about Drupal 6 Essential Training .


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Q: While following along to the installation instructions in the “Installing WAMP and Drupal on Windows” chapter in the Drupal Essential Training title, an error occurs when attempting to open the local host page. Nothing appears except for an error reading “WAMPSERVER server offline.” What is causing this?
A: There is a known problem with some versions of WAMP that include a version of PHP (5.3) that some versions of Drupal is not compatible with. See http://tomgeller.com/content/tips-running-drupal-windows-using-wamp#comment-831 for more information.
If that is not causing the issue, reference the tips at http://tomgeller.com/content/tips-running-drupal-windows-using-wamp.
If you don't see the solution at either of those links, try using another AMP stack, such as XAMPP or the Acquia stack installer. See http://tomgeller.com/content/what-hells-wrong-drupal-wamp for discussion about these.
Q: After installing XAMPP and running Drupal for the first time, the Administration menu does not appear. What is the reason for this?
A: There are several possible problems. Here are some likely solutions. (These may also solve problems encountered with other AMP stacks.)
  1. Increase XAMPP's PHP allocation.
  2. Check to make sure all XAMPP's paths are correct and that permissions are correct. If the database information appears, but not Drupal's supporting files, and an included theme is being used, the supporting files will be in the /modules folder.
  3. Another solution is to not use WAMP or XAMPP. One option is to use Acquia's Drupal Stack Installer ("DAMP"), which can be found at http://www.acquia.com/downloads. However, that installs Acquia Drupal, which is a version of "normal" Drupal extended with additional modules. If  only core Drupal is desired, see the instructions at http://acquia.com/blog/kieran/try-drupal-7-alpha-your-laptop-or-desktop. (The instructions are for Drupal 7, but will work for Drupal 6 as well.)
Q: In the "Using the example files" movie, the method of importing information to the database is shown, using the backup in Chapter 10. When attempting to do this, the following error is shown: "No data was received to import. Either no file name was submitted, or the file size exceeded the maximum size permitted by your PHP configuration. See FAQ 1.16." The system is running the latest versions of Apache, PhP and MySQL, on Windows Vista. What could be causing the problem?
A: This is probably caused because your AMP stack allocates too little memory to PHP. 
 
That's especially true if you're using WAMP, which only gives PHP 2MB of memory, when it really needs at least 16MB. 
You'll see the issue if you go to the MySQL-controlling phpMyAdmin screen (probably at http://localhost/phpMyAdmin) and click "Import": The maximum file size allowed is 2,048K. That's only 2MB, and the databases for most Drupal sites are much larger than that. (The example site for Drupal Essential Training gets as big as 5MB.) The video "Installing WAMP and Drupal on Windows" shows (at around 3:30) where the php.ini file is, but here are some more-complete instructions to increase that memory limit. 

  1. Click the WAMP icon in your system tray.
  2. Select "PHP". In the side menu, select "php.ini" to open a file containing PHP's configuration options.
  3. Search for the line, "upload_max_filesize = 2M".
  4. Change it to "upload_max_filesize = 32M" (or whatever you like). 
  5. Save the file and restart WAMP. (Better yet, restart your computer entirely to be sure. I'm frankly not sure whether it makes a difference.)
  6. Now go back to that "Import" screen in phpMyAdmin: You should notice that the limit has changed.
Q: I don't remember the default username and password used demonstrate Drupal.
A: The default username used in the course is "admin"; the default password is "booth".
Q: How can I change Drupal's administrative username and password?
A: If for some reason the default exercise file username (admin) and password (booth) don't work, you can change them in the database itself using phpMyAdmin. (This technique is demonstrated in a video from Chapter 8, "Recovering from disasters".)

  1. Open your Drupal database with phpMyAdmin.
  2. Go to the "users" table. Click the Browse icon.
  3. For the row where uid = 1, click the Edit icon. (Note the value under the "Name" column: That's the administrator's username.)
  4. In the "pass" row, select "MD5" under the "Function" column
  5. In the same row, enter your new password under the "Value" column.
  6. At the bottom of the screen, click the "Go" button. You should now be able to log in with that username and new password.
Q: In Windows Vista, the WAMP icon disappears from the system tray after a certain amount of time. How do I get it to reappear?
A: To make the WAMP icon reappear (so that you can access localhost, phpmyadmin, php.ini, etc.), you have to activate the "start WAMP server" icon (from start menu, desktop or wherever). The system tray icon will reappear.
Q: My .htaccess file disappeared. What caused this?
A: A few times during the Drupal Essential Training video series, the instructor says to copy a Drupal installation by selecting all the files in the folder and then "dragging and dropping" them, either to a server or another location on your local computer. This is not the best way to do so, as the hidden file ".htaccess" will not be copied. 

There are two ways to get around that problem: 
  1. When installing Drupal for the first time: Instead of copying files from the Drupal folder, move the entire folder to its target location and rename it. This is the easiest solution for those without experience with Unix. 
  2. Use the command-line interface to copy the .htaccess file.
Sorry for the error.
Q: In the video, the instructor says the current version of Drupal is 6.3, but on the drupal.org site, the latest version is 6.17. Which is the newer version of Drupal?
A: Drupal 6.17 is newer than version 6.3. For some reason, the the version numbers go 6.3, 6.4... 6.9, 6.10... 6.17. It’s counter-intuitive, but that’s the order.
Q: My WAMP phpMyadmin will not allow me to upload the exercise files. It returns this message: "No data was received to import. Either no file name was submitted, or the file size exceeded the maximum size permitted by your PHP configuration. See FAQ 1.16." There was no previous database to drop, so what do I need to do to make this work?
A: This is a common problem, caused not by Drupal, but by WAMP. WAMP only allows you to upload files of 2MB or smaller, which is much too small. The solution is detailed at http://tomgeller.com/cant-import-a-drupal-site-in-windows.
 
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