This issue relates specifically to the patch here: #1175082: Field collection field handler for migrate module.
I created this new thread because I didn't want to flood the other one with support requests seeing as the patch apparently works and the issue is already RTBC.
@mikeryan, the code comments at the top of field_collection.migrate.inc state that the Field Collection migration must introduce a dependency on the host entity migration and link them like this:
My question is related to the "source_article_id" part; where do we obtain this? Assuming a migration from CSV where each article (to stick with the example) doesn't necessarily have an id? Should we create a dummy source field for use with the migration?