Migrate node with paragraph

Question

I'm trying to figure out how migrating content from a Drupal 7 site to a Drupal 8 site works. I managed to understand how to create a custom module to migrate nodes with regular fields to my new D8 site.

But I also have one content type where I use paragraphs. And I can't seem to find a well documented example on how to do this. I found some examples but they all seem to use different methods. This one seems like the most up to date. But how to make the code from #9 work?

field_paragraphs:
plugin: sub_process
source: field_source_paragraphs
process:
  target_id:
    -
      plugin: migration_lookup
      migration:
        - paragraph_box
        - paragraph_grid
        - paragraph_text_embedded
      source: value
    -
      plugin: extract
      index:
        - 0
  target_revision_id:
    -
      plugin: migration_lookup
      migration:
        - paragraph_box
        - paragraph_grid
        - paragraph_text_embedded
      source: value
    -
      plugin: extract
      index:
        - 0

So the field_paragraphs and field_source_paragraphs I understand. But what are these paragraph_ items under migration? Is this where I set the paragraph bundles? And if not where do I set the paragraph bundles and there fields? So where do I begin? What are the right steps to take?

Thanks in advance

Answer 1

You'll need to create a plugin within your custom module in order to migrate paragraph fields properly. I just finished this process on a large site. I'm paring down the module to make it a bit easier to understand and making it available in a public repository, along with an explanatory video:

https://www.arsnova.cc/drupal-7-drupal-8-paragraph-migration