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Migrations often do not exist or can't be found

Open on Drupal.org →
Created on 20 February 2017, about 8 years ago
Updated 10 March 2023, about 2 years ago

I keep running into cases where commands (migrate-import, migrate-status) cannot find migrations. Usually I'm trying to run a migration, so I start with mi and then run ms when that is not found, which results in an empty result. This especially happens when using the same DB/code/config on a different host (develop locally, put everything on staging, then migrations not found).

I have tried diagnosing a bit and have noticed:

  • All of the modules necessary are installed (migrate, migrate_tools, my migrate module, etc)
  • I have tried the service calls with code from #2832199 and #2795447 but the following is empty: 
$manager = \Drupal::service('plugin.manager.migration');
$plugins = $manager->createInstances([]);
var_dump(array_keys($plugins));

This may be heavily related to the issues above, but I'm trying to assess if there is a way for me to get this working.

Drupal version: 8.2.6

🐛 Bug report
Status

Postponed: needs info

Version

6.0

Component

Drush commands

Created by

🇺🇸United States rballou

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  • Comment about 2 years ago →
    🇧🇪Belgium tvb

    Chiming in with my case:

    If you use a custom source plugin, make sure source_module in the annotation is set to an enabled module in the source site.

    drush migrate:import <migration_id> will just report "No migrations found", while log messages contains a message "Migration did not meet the requirements." with mention of the offending source_module.

  • Comment over 1 year ago →
    🇬🇷Greece TheodorosPloumis Greece

    Had the same issue when installed the taxonomy_machine_name → module.

  • Comment 3 months ago →
    🇺🇸United States mallory99

    I ran into this issue today, with taxonomy term migrations in a custom module. CSV term migrations (in the same module) worked normally for a different vocabulary. The migration ids were correct and cache rebuilding made no difference.

    On a hunch, I ran drush migrate:upgrade --legacy-db-key=migrate --legacy-root=http://[installation] --configure-only. After doing this, suddenly the rejected migrations ran.

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