Use deriver in Drupal Migration yml

Stefan Korn

6/7/23, 3:59 PM

I am trying to use the deriver key in a migration yml to have dynamically build migrations for each bundle of an Entity Type (Drupal 9).

I read this and I am trying to use the deriver key to point to a Deriver class in my migration. However it seems that the deriver key is just ignored.

Is there something else that I need to do beside using the deriver key and create a deriver class that inherits from Drupal\Component\Plugin\Derivative\DeriverBase?

This is the migration yml:

id: person_roles
label: Import 
deriver: Drupal\my_module\PersonRoleImportDeriver
migration_group: my_group
source:
  plugin: url
  data_fetcher_plugin: http
  data_parser_plugin: xml
  urls: public://this.xml
  fields:
    -
      name: position_name
      label: person role name
      selector: funktion
  ids:
    position_name:
      type: string
destination:
  plugin: 'entity:my_entity'
process:
  name:
    -
      plugin: skip_on_empty
      method: row
      source: position_name
      message: 'Empty source person role'
    -
      plugin: make_unique_entity_field
      entity_type: my_entity
      migrated: true
      field: name

0 + 0

migrations

plugins

Score:1

Drupal

Lambic

6/7/23, 4:14 PM

It's a plugin, so you need to respect the plugin directory structure and namespace.

Your class should be in my_module/src/Plugin/migrate and have the namespace Drupal\my_module\Plugin\migrate.

0 + 0

Stefan Korn

6/7/23, 4:48 PM

Hm, I think a Deriver is not a plugin? It has no annotation though. Anyway, if I put the Deriver in the plugin folder it still seems not get called.

Lambic

6/7/23, 4:55 PM

So your deriver class implements getDerivativeDefinitions() and that method never gets called?

Stefan Korn

6/8/23, 5:33 AM

Yes, that seems to be the problem.

Lambic

6/8/23, 1:48 PM

Not sure why that would be, I use the same pattern. Does your class include the MigrationDeriverTrait?

Stefan Korn

6/8/23, 4:31 PM

it seems its about where the config yml for the migration lives. If it lives in config/install folder the deriver will not get caught, but if it lives in the migrations folder it will work. The Deriver class itself could live anywhere in the namespace. I am just currently understanding the difference between config/install and migrations in that case.

Lambic

6/9/23, 1:40 PM

Ah interesting, we switched to using the migrations directory fairly early on.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Use deriver in Drupal Migration yml

TH: ใช้ deriver ใน Drupal Migration yml

RO: Utilizați derivatul în Drupal Migration yml

RU: Использовать дериватор в Drupal Migration yml

VI: Sử dụng trình dẫn xuất trong Drupal Migration yml

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