media_migration-8.x-1.x-dev/migrations/d7_file_entity_source_field.yml

id: d7_file_entity_source_field
label: Media source field storage configuration
migration_tags:
  - Drupal 7
  - Configuration
deriver: Drupal\media_migration\Plugin\migrate\D7FileEntityConfigDeriver
idMap:
  plugin: smart_sql
source:
  plugin: d7_file_entity_source_field_storage
  constants:
    entity_type_id: media
    status: true
    langcode: und
    cardinality: 1
process:
  preexisting_field_name:
    -
      plugin: migmag_get_entity_property
      source: bundle
      entity_type_id: 'media_type'
      property: 'source_configuration'
    -
      plugin: default_value
      default_value:
        source_field: NULL
    -
      plugin: extract
      index:
        - source_field
  new_field_name:
    -
      plugin: callback
      callable: is_null
      source: '@preexisting_field_name'
    -
      plugin: callback
      callable: intval
    -
      plugin: skip_on_empty
      method: process
    -
      plugin: make_unique_entity_field
      source: source_field_name
      entity_type: field_storage_config
      field: id
      length: 29
      postfix: '_'
  field_name:
    plugin: null_coalesce
    source:
      - '@new_field_name'
      - '@preexisting_field_name'
  status: 'constants/status'
  langcode: 'constants/langcode'
  entity_type: constants/entity_type_id
  type: field_type
  # Translatable is not migrated and the Drupal 8 default of true is used.
  # If translatable is false in field storage then the field can not be
  # set to translatable via the UI.
  #translatable: translatable
  cardinality: 'constants/cardinality'
  settings: settings
destination:
  plugin: entity:field_storage_config
migration_dependencies:
  required:
    - d7_file_plain_type