I am creating file entities with migrate using drush. Image files are being copied down from a remote server. I tried


If I run the migration with --update it duplicates the files, not replacing existing ones.

drush mi DAProductImages --limit="10 items" --update

When I run this first time it creates the files. Second time it adds _0 to the filenames and duplicates the files. If I rollback after first migration the files are being removed. When rolling back after the second migration only files of last batch get removed. I also tried with:


How can I make it so that I will not end up with duplicates? I have about 30000 images so I cannot afford that.

  • Have you tried FILE_EXISTS_REUSE? – Marcelo Vani Apr 29 '15 at 11:55
  • Yes, I am still getting the duplicated file. – NickO Apr 29 '15 at 11:58

This solved it for me.

The documentation at this link was missing a mention that you need to use the class prefix - I just submitted an update to the Drupal Docs to make it more clear:



This works:

$this->addFieldMapping('field_document', 'field_document_uri');

Found here.

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