Migrations
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Yaron Tal discusses various aspects of upgrades and migrations in Drupal, emphasizing the importance of testing and documentation during the process. He highlights tools and modules like the Migrate and Module Upgrader, along with examples for backend upgrades using Drupal 6 and 7. The document concludes with recommendations for handling content migration and ensuring that HTML elements, such as images and links, are properly managed.
![Upgrade: Backend Example
Drupal 6
foreach ($properties as $property) {
$i++;
$joins[] = 'JOIN $property['table'] . 'p' . $i . ' ON n.nid=p' . $i . '.nid';
$select[] = 'p' . $i . $property['column'];
}
$query = 'SELECT ' . implode(', ', $select) . ' FROM {node} n ' . implode(' ', $joins);
Drupal 7
$query = db_select('node', 'n');
foreach ($properties as $property) {
$alias = $query?>
join($property['table'], 'p', 'n.nid=p.nid');
$query?>
addField($alias, $property['column']);
}](https://image.slidesharecdn.com/migrations-141120151551-conversion-gate02/85/Migrations-7-320.jpg)
Migrations
- 1. Upgrades and Migrations Yaron Tal 20-nov-2014
- 2. About me ● Yaron Tal ● Drupal backend developer @oneshoe ● Multiple big migrations ● http://ytal.nl
- 3. What do you migrate and upgrade? ● Tests ● Functionality ● Front?end ● Back?end ● Content ● Migrate module
- 4. Tests ● Test plans ● Unit tests, behat, … ● Documentation
- 5. Upgrade: Front?end https://www.drupal.org/update/themes/6/7 ● New jQuery ● SASS? ● Twig in D8
- 6. Upgrade: Back?end https://www.drupal.org/update/modules/6/7 ● Module upgrader (https://www.drupal.org/project/drupalmoduleupgrader) ● Coder ● Field API, DB API, hooks, views API, ...
- 7. Upgrade: Backend Example Drupal 6 foreach ($properties as $property) { $i++; $joins[] = 'JOIN $property['table'] . 'p' . $i . ' ON n.nid=p' . $i . '.nid'; $select[] = 'p' . $i . $property['column']; } $query = 'SELECT ' . implode(', ', $select) . ' FROM {node} n ' . implode(' ', $joins); Drupal 7 $query = db_select('node', 'n'); foreach ($properties as $property) { $alias = $query?> join($property['table'], 'p', 'n.nid=p.nid'); $query?> addField($alias, $property['column']); }
- 8. Content ● Migrate module (https://www.drupal.org/project/migrate) ● D2D migrate (https://www.drupal.org/project/migrate_d2d) ● Other modules for other sources
- 9. Migrate module ● OOP ● Migration classes ● Source classes ● Destination classes ● Drush
- 10. Migrate module: Mapping ● Node ● File ● Taxonomy ● Users ● Custom entity
- 11. Migrate module: Inline media libraries_load('simplehtmldom') $html = str_get_html($text); foreach ($html?> find('img') as $image) { } ● Media module (https://www.drupal.org/project/media) ● Youtube/vimeo/...
- 12. Migrate module: Inline links libraries_load('simplehtmldom') $html = str_get_html($text); foreach ($html?> find('a') as $link) { } ● Aliases, redirects, node table. ● New version of node might not exist.
- 13. Migrate module: advanced ● Stubs ● Continuous migrations (Highwater) ● $this?> systemOfRecord = Migration::DESTINATION;
- 14. Conclusion ● Upgrade tests and documentation ● Upgrade theme and modules using the module upgrader ● Check code with coder module ● Migrate content using migrate module and helper module for specific source ● Use an html parser to find images, links and other html elements that need changing
- 15. Questions?
Editor's Notes
- #14: Stubs to make node exist to be able to link to it Highwater to update in parts/continuous. System of record to update parts instead of create or update the whole record