This document summarizes the key differences between Drupal 6.x and Drupal 7.x. It discusses changes to modules, fields, APIs, database handling, testing and theming. The presentation provides a high-level overview of major updates and points to additional resources for more detailed information. It aims to help developers understand the major changes when updating from Drupal 6 to Drupal 7.

1. 2011-06-15
Web Treff / DUG KölnBonn
„Webseiten und Web-Applikationen mit
Drupal 7“
drupal-6.x-–drupal-7.x –
„Scratching the surface“
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

2. whoami
Florian Latzel
● @fl3a
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

3. whoami
Florian Latzel
● @fl3a → flEa
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

4. whoami
Florian Latzel
● @fl3a → flea
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

5. whoami
Florian Latzel
● @fl3a → floh
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

6. drupal­7.x
?
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

7. cat drupal­6.x­­drupal­7.x
● Birdseye
● Navigation / Menus
● Modules
● Simpletest
● Fields
● API
● DBTNG
● Theming
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

8. Birdseye
Size drupal-6.x (decompresed)
● 8.5M
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

9. Birdseye
Size drupal-7.x (decompressed)
● 22M
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

10. Birdseye
4d3
diff [1] < blogapi
8a8,9
> contextual
> dashboard
9a11,13
> field
> field_ui
> file
12a17
> image
16a22
> overlay
19d24
< ping
21a27
> rdf
23a30,31
> shortcut
> simpletest
28c36
< throttle
---
> toolbar
33d40
< upload
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

11. Navigation / Menus
Where the f*ck is … ?
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

12. modules
Some modules (and functionality) moved into core [2]
● node/8
● Adminrole
● Poormanscron
● Token
● Vertical Tabs
● ImageAPI, ImageCache,
● RDF
● ...
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

13. modules
JavaScript should be compatible with other
libraries than jQuery [3] [4]
((function ($) {
Drupal.behaviors.exampleModule = {
attach: function (context, settings) {
$('.example', context).click(function () {
$(this).next('ul').toggle('show');
});
}
};
}(jQuery));
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

14. simpletest
find drupal-7.x -type d -name tests
./themes/tests
./modules/update/tests
./modules/node/tests
./modules/filter/tests
./modules/openid/tests
./modules/locale/tests
./modules/simpletest/tests
./modules/file/tests
./modules/user/tests
./modules/field/modules/list/tests
./modules/field/tests
./modules/rdf/tests
./modules/block/tests
./modules/search/tests
./modules/image/tests
./modules/trigger/tests
./modules/aggregator/tests
./modules/translation/tests
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

15. simpletest
Unit tests – Best tested drupal [5]:
● Module [6]
● Library [7]
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

16. Fields
Goodbye CCK – hello fields!
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

17. Fields
tree -d drupal-7.x/modules/field
drupal-7.x/modules/field
|-- modules
| |-- field_sql_storage
| |-- list
| | `-- tests
| |-- number
| |-- options
| `-- text
|-- tests
`-- theme
● + drupal-7.x/modules/image/image.field.inc
● + drupal-7.x/modules/file/file.field.inc
● - userreference, - nodereference [8]
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

18. API
API Changes (some of them) [9]
● Block module now optional
● db_rewrite_sql() replaced with
hook_query_alter()
● New user_cancel API
● jQuery UI (1.7) was added into core
● hook_perm() renamed to hook_permission()
● Module .info files can have configure line
● ...
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

19. DBTNG
Database Layer: The Next Generation
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

20. DBTNG
drupal-6.x:
$query = “SELECT linkpath, weight
FROM {menu_links} l
WHERE l.'menu_name = 'menu-clone-main-menu'
ORDER BY weight ASC“;
$result = db_query(query);
...
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

21. DBTNG
drupal-7.x
$query = db_select('menu_links', 'l')
->fields('l', array('link_path', 'weight'))
->condition('l.menu_name', 'menu-clone-main-menu')
->orderBy('l.weight', 'ASC');
$result = $query->execute();
...
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

22. Theming
● API Changes
● Anatomy of theme
● Naming of template files
● Template variables
● ...
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

23. Theming
API Changes, Theming (some of them) [10]
● Primary and secondary links are now Main and
Secondary menu
● New html.tpl.php files
→ drupal-7.x/modules/system/html.tpl.php
● Content region is now mandatory, main page
content became a block
● $closure becomes $page_bottom, new
$page_top and hidden regions
● ...
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

24. Theming
Anatomy of a theme
themes/
`-- mytheme
|-- css
| `-- style.css
|-- img
| |-- slider_links.png
| `-- slider_rechts.png
|-- screenshot.png
|-- scripts
| `-- core.js
|-- template.php
|-- templates
| |-- html.tpl.php
| |-- node--wassergebiet.tpl.php
| |-- page.tpl.php
| |-- views-slideshow-controls-text-next.tpl.php
| |-- views-slideshow-controls-text-pause.tpl.php
| |-- views-slideshow-controls-text-previous.tpl.php
| `-- views-slideshow.tpl.php
`-- mytheme.info
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

25. Theming
drupal-6.x template variables
● print $header
● print $content;
● print $footer;
● ...
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

26. Theming
drupal-7.x template variables
● render($page['header']);
● render($page['content']);
● render($page['footer']);
● ...
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel

27. cat /usr/src
Appendix
[1] diff on ls -A1 drupal-6.x/modules and drupal-7.x/modules
[2] http://www.unleashedmind.com/node/52
[3] http://drupal.org/update/modules/6/7#javascript_compatibility
[4] http://drupal.org/node/756722
[5] http://qa.drupal.org/
[6] http://drupal.org/project/simpletest
[7] http://simpletest.sourceforge.net/
[8] http://drupal.org/project/references
[9] http://drupal.org/update/modules/6/7
[10] http://drupal.org/update/themes/6/7
drupal­6.x­­drupal­7.x – „Scratching the surface“|Web Treff Köln|2011­06­15|Florian Latzel