gistfile1.txt

# Every migration that references a file by Drupal 7 fid should specify this
# migration as an optional dependency.
id: odl_file
label: Files
migration_tags:
  - Drupal 7
source:
  plugin: d7_file
  scheme: public
  constants:
    # The tool configuring this migration must set source_base_path. It
    # represents the fully qualified path relative to which URIs in the files
    # table are specified, and must end with a /. See source_full_path
    # configuration in this migration's process pipeline as an example.
    source_base_path: '/var/odl-d7'
    zero: 0
process:
  filename: filename
  source_full_path:
    -
      plugin: concat
      delimiter: /
      source:
        - constants/source_base_path
        - filepath
    -
      plugin: urlencode
  uri:
    plugin: file_copy
    move: true
    source:
      - '@source_full_path'
      - uri
  filemime: filemime
  # No need to migrate filesize, it is computed when file entities are saved.
  # filesize: filesize
  status: status
  # Drupal 7 didn't keep track of the file's creation or update time -- all it
  # had was the vague "timestamp" column. So we'll use it for both.
  created: timestamp
  changed: timestamp
  uid: constants/zero
destination:
  plugin: entity:file

gistfile2.txt

id: odl_attendance
source:
  plugin: odl_attendance
  constants:
    type: odl_order_item_type
    gbp: GBP
process:
  type: constants/type
  order_id:
    -
      plugin: migration_lookup
      migration: odl_order
      source: order_id
    -
      plugin: odl_fake_order
  unit_price/0/number: price
  unit_price/0/currency_code: constants/gbp
  # OrderItem::preSave recalculates the total.
  purchased_entity:
    -
      plugin: migration_lookup
      migration: odl_event
      source: nid
      no_stub: true
    -
      plugin: skip_on_empty
      method: row
    -
      plugin: odl_find_variation
  field_attended: has_attended
  field_waitlisted:
    plugin: static_map
    source: field_name
    map:
      field_attending_paid: false
      field_attending_part_paid: false
      field_waiting_list_paid: true
      field_waiting_list_part_paid: true
destination:
  plugin: entity:commerce_order_item
migration_dependencies:
  required:
    - odl_order
    - odl_event