dinarcon/image_migration_process.yml

## image_migration_process.yml
process:
  psf_destination_filename:
    plugin: callback
    callable: basename
    source: photo_url

## image_migration_source.yml
source:
  plugin: csv
  path: modules/custom/ud_migrations/ud_migrations_csv_source/sources/udm_photos.csv
  ids: [photo_id]
  header_offset: null
  fields:
    - name: photo_id
      label: 'Photo ID'
    - name: photo_url
      label: 'Photo URL'

## node_migration_process_destination_and_dependencies.yml
process:
  field_ud_image/target_id:
    plugin: migration_lookup
    migration: udm_csv_source_image
    source: photo_file
destination:
  plugin: 'entity:node'
  default_bundle: ud_paragraphs
migration_dependencies:
  required:
    - udm_csv_source_image
    - udm_csv_source_paragraph
  optional: []

## node_migration_source.yml
source:
  plugin: csv
  path: modules/custom/ud_migrations/ud_migrations_csv_source/sources/udm_people.csv
  ids: [unique_id]

## paragraph_migration_process.yml
process:
  field_ud_book_paragraph_title: book_title
  field_ud_book_paragraph_author: 'Book author'

## paragraph_migration_source.yml
source:
  plugin: csv
  path: modules/custom/ud_migrations/ud_migrations_csv_source/sources/udm_book_paragraph.csv
  ids: [book_id]
  header_offset: null
  fields:
    - name: book_id
    - name: book_title
    - name: 'Book author'

## udm_book_paragraph.csv

          
            B10
            The definite guide to Drupal 7
            Benjamin Melançon et al.

            
              B20
              Understanding Drupal Views
              Carlos Dinarte

            
              B30
              Understanding Drupal Migrations
              Mauricio Dinarte

## udm_people.csv

          
            unique_id
            name
            photo_file
            book_ref

            
              1
              Michele Metts
              P01
              B10

            
              2
              Benjamin Melançon
              P02
              B20

            
              3
              Stefan Freudenberg
              P03
              B30

## udm_photos.csv

          
            P01
            https://agaric.coop/sites/default/files/pictures/picture-15-1421176712.jpg

            
              P02
              https://agaric.coop/sites/default/files/pictures/picture-3-1421176784.jpg

            
              P03
              https://agaric.coop/sites/default/files/pictures/picture-2-1421176752.jpg
	process:
	psf_destination_filename:
	plugin: callback
	callable: basename
	source: photo_url
	source:
	plugin: csv
	path: modules/custom/ud_migrations/ud_migrations_csv_source/sources/udm_photos.csv
	ids: [photo_id]
	header_offset: null
	fields:
	- name: photo_id
	label: 'Photo ID'
	- name: photo_url
	label: 'Photo URL'
	process:
	field_ud_image/target_id:
	plugin: migration_lookup
	migration: udm_csv_source_image
	source: photo_file
	destination:
	plugin: 'entity:node'
	default_bundle: ud_paragraphs
	migration_dependencies:
	required:
	- udm_csv_source_image
	- udm_csv_source_paragraph
	optional: []
	process:
	field_ud_book_paragraph_title: book_title
	field_ud_book_paragraph_author: 'Book author'
B10	The definite guide to Drupal 7	Benjamin Melançon et al.
B20	Understanding Drupal Views	Carlos Dinarte
B30	Understanding Drupal Migrations	Mauricio Dinarte
unique_id	name	photo_file	book_ref
1	Michele Metts	P01	B10
2	Benjamin Melançon	P02	B20
3	Stefan Freudenberg	P03	B30
	P01	https://agaric.coop/sites/default/files/pictures/picture-15-1421176712.jpg
	P02	https://agaric.coop/sites/default/files/pictures/picture-3-1421176784.jpg
	P03	https://agaric.coop/sites/default/files/pictures/picture-2-1421176752.jpg