Абраменко Иван выступил с темой “Migrate drupal 6 to drupal 8” на Drupal Cafe #18 Видео с выступления вы можете увидеть, перейдя по ссылке https://youtu.be/kC5U7PKHu7c?list=PLtUZRIj1OWYzCGb3OCYMVYqnrJ-EpH0Ot

1. Migration from Drupal 6 to Drupal 8
My first Drupal 8 migration
Created by / Drupal developerIvan Abramenko CimpleO

2. ceservices.com

3. Drupal 8.0.x
Migrate Upgrade / Drupal Upgrade
https://www.drupal.org/project/migrate_upgrade
Drupal Upgrade - Drupal 8.1.x
Migrate Drupal UI - Drupal 8.2.x

4. Drupal 8.1.x migration
Migrate UI didn't work for Drupal 8.1.x and above
https://www.drupal.org/project/migrate_ui
Migrations are core are now plugins, not con g entities.
https://www.drupal.org/node/2677198
https://www.drupal.org/node/2625696
Try to use Migrate Drupal UI core module for Drupal 8.2.x
and above.

5. Drupal 8.2.x migration
Migrate Drupal UI in core!
Works, but not perfect.

6. Drupal 8.0.x migration
Drupal 8.0.x => Drupal 8.1.x => Drupal 8.2.x
Uninstall drupal migrate modules after migration and before
update to 8.1.x!

7. Why should use migrate module?
Migrate map
Import/Rollback
Stub content
Migrate import (drush support)
With Migrate Tools module
https://www.drupal.org/project/migrate_tools
drush migrate­import migration_name
drush migrate­rollback migration_name

8. Prepare migrations to import
drush migrate­upgrade
­­legacy­db­url=mysql://user:password@localhost:3306/db
­­legacy­db­prefix=drup_
­­legacy­root=http://www.ceservices.com
­­configure­only

9. Drupal Upgrade module:

10. Drupal Upgrade
Successfully migrated:
User roles
Users
Node types (needed static map)
Failed with:
Nodes

11. Node types (needed static map)
blog_entry ­> blog_post
lp ­> landing_page
2 ways to resolve it:
Add static map for migration .yml le
Add custom plugin

12. Process pipeline

13. Process pipeline
https://www.drupal.org/node/2129651
Plugins in Migrate UI:

14. static map
migration
explode
iterator
callback
concat
dedupe_entity
dedupebase
default_value
extract
atten
machine_name
skip_on_empty
skip_row_if_not_set

15. Custom plugins
/modules/ceservices_migrate/src/Plugin/migrate/process/CeservicesFieldsType.php
<?php
/**
* @file
* Contains Drupalceservices_migratePluginmigrateprocessCeservicesFieldsType
*/
namespace Drupalceservices_migratePluginmigrateprocess;
use DrupalmigrateProcessPluginBase;
use DrupalmigrateMigrateExecutableInterface;
use DrupalmigrateRow;
/**
* This plugin replaces old node_types with new.
*
* @MigrateProcessPlugin(
* id = "ceservices_fields_type"

16. Custom plugins
/modules/ceservices_migrate/src/Plugin/migrate/process/CeservicesNodeTypes.php
<?php
/**
* @file
* Contains Drupalceservices_migratePluginmigrateprocessCeservicesNodeTypes.
*/
namespace Drupalceservices_migratePluginmigrateprocess;
use DrupalmigrateProcessPluginBase;
use DrupalmigrateMigrateExecutableInterface;
use DrupalmigrateRow;
/**
* This plugin replaces old node_types with new.
*
* @MigrateProcessPlugin(
* id = "ceservices_node_types"

17. UI doesn't work as you want
https://www.drupal.org/node/2708967

18. UI doesn't work as you want
https://www.drupal.org/node/2708967
migrate.migration.d6_node_type.yml
...
process:
type:
plugin: static_map
source: type
map:
blog_entry: blog
...

19. Custom migrations are better than Migrate
Upgrade

20. Custom migrations
Nodes
Taxonomy
Nodewords, Page Title to Metatag

21. Nodes migration
YML- le for each content type:
/modules/ceservices_migrate/con g/install/
migrate.migration.ceservices_blog.yml
migrate.migration.ceservices_book.yml
migrate.migration.ceservices_page.yml
migrate.migration.ceservices_story.yml
...

22. migrate.migration.ceservices_blog.yml:
id: ceservices_blog
label: Blog nodes migration from Drupal 6
dependencies:
enforced:
module:
­ ceservices_migrate
source:
plugin: ceservices_blog
destination:
plugin: entity:node
process:
nid: nid
vid: vid
type: type
langcode:
plugin: static_map
bypass: true

23. Source => Destination
source:
plugin: ceservices_blog
destination:
plugin: entity:node

24. Source plugin
Custom plugin or d6_node?
Our choice is custom one. Extend DrupalSqlBase class, not
Node class for Drupal 6.

25. Blog source plugin
/modules/ceservices_migrate/src/Plugin/migrate/source/CeservicesBlog.php
<?php
/**
* @file
* Contains Drupalceservices_migratePluginmigratesourceCeservicesBlog.
*/
namespace Drupalceservices_migratePluginmigratesource;
use DrupalmigrateRow;
use Drupalmigrate_drupalPluginmigratesourceDrupalSqlBase;
/**
* Drupal 6 Blog node source plugin
*
* @MigrateSource(
* id = "ceservices_blog"

26. Why did we use DrupalSqlBase instead of
SourcePluginBase or SqlBase?

27. Blog source plugin's methods

28. query()
public function query() {
$query = $this­>select('node', 'n')
­>condition('n.type', 'blog')
­>fields('n');
$query­>orderBy('nid');
return $query;
}

29. fields()
public function fields() {
$fields = $this­>baseFields();
$fields['body/format'] = $this­>t('Format of body');
$fields['body/value'] = $this­>t('Full text of body');
$fields['body/summary'] = $this­>t('Summary of body');
$fields['field_related_testimonial'] = $this­>t('Related testimonial');
$fields['field_related_resources'] = $this­>t('Related Resources');
$fields['field_related_blog'] = $this­>t('Related Blog Posts');
$fields['field_taxonomy'] = $this­>t('Taxonomy');
return $fields;
}

30. prepareRow(Row $row)
public function prepareRow(Row $row) {
$nid = $row­>getSourceProperty('nid');
// body (compound field with value, summary, and format)
$result = $this­>getDatabase()­>query('
SELECT
*
FROM
{node_revisions} n
INNER JOIN {node} node ON n.vid = node.vid
LEFT JOIN {content_type_blog} t ON t.vid = n.vid
LEFT JOIN {content_field_related_testimonial} r ON r.vid = n.vid
WHERE
n.nid = :nid
LIMIT 0, 1
', array(':nid' => $nid));
foreach ($result as $record) {

31. Single value fields:
$row­>setSourceProperty('body_value', $record­>body);
Multiple values fields:
// Multiple fields.
$result = $this­>getDatabase()­>query('
SELECT
*
FROM
{content_field_related_resources} r
INNER JOIN {node} node ON r.vid = node.vid
WHERE
r.nid = :nid
', array(':nid' => $nid));
$related_resources = [];
foreach ($result as $record) {
if (!empty($record­>field_related_resources_nid)) {
$related_resources[] = $record­>field_related_resources_nid;
}
}
$row­>setSourceProperty('field_related_resources', $related_resources);

32. And few methods to describe entity:
public function getIds() {
$ids['nid']['type'] = 'integer';
$ids['nid']['alias'] = 'n';
return $ids;
}
public function bundleMigrationRequired() {
return FALSE;
}
public function entityTypeId() {
return 'node';
}

33. Process — map between
destination => source
process:
nid: nid
vid: vid
type: type
langcode:
plugin: static_map
bypass: true
source: language
map:
und: en
en: en
title: title
uid: uid
status: status
created: created
changed: changed
promote: promote

34. We decided to use old nid/vid values:
process:
nid: nid
vid: vid
Be sure you deleted all content before
migration!

35. Use batch API for any problems after
migration
Nodewords, Page Title:
https://www.drupal.org/node/2052441
https://www.drupal.org/node/2563649

36. Thank you! And successful migrations!
Migration from Drupal 6 to Drupal 8
My first Drupal 8 migration
Created by / Drupal developerIvan Abramenko CimpleO
levmyshkin89@gmail.com