I have got existing Drpal 8.5 site with hundreds of nodes. With migrate, if i try to upgrade, new nodes are rather created. Node have a field which is being used as key however that seem to be not working. It seems that node are only updated if their record present in migrate_map_xyz. Any suggestions?

1 Answer 1


Updating existing content was possible by changing the default behaviour of a migration with the system of record concept in Drupal 7.

In Drupal 8 this concept has been revised & is available with the overwrite_properties option in the destination of the migration YAML:

  plugin: 'entity:node'
  # define the entity properties that are to be updated.
    - title
    - field_foo
    - field_bar
  • Can't seem to get it work. Here is the code; with this, it still creates new nodes. Source: plugin: csv path: public://migrate/simple_assets.csv delimiter: ',' enclosure: '"' header_row_count: 1 keys: - serial column_names: 0: serial: 'Serial/Service Tag' 1: type: 'Type' (source plugin data here) destination: plugin: entity:node override_properties: - serial - type serial,type ABC123,Laptop XYZ124,Laptop Commented Mar 9, 2018 at 4:06
  • Migration YAML and CSV Commented Mar 9, 2018 at 4:17

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