Drush a few common commands to import and reset

Working through and importing JSON data into a content type.

Drush migration commands

Check the status of the migration data

lando drush migrate-status

Reset the migration status 

lando drush migrate-reset-status  migratable_riverdata_json

Import JSON data

lando drush migrate-import migratable_riverdata_json

Rollback to before the import

lando drush migrate-rollback migratable_riverdata_json

Errors

What to do when a migration fails?  You will see a response similar to

lando drush migrate-import migratable_basic_content_json
 3/3 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%
 [notice] Processed 3 items (0 created, 0 updated, 3 failed, 0 ignored) in 1.1 seconds (162.7/min) - done with 'migratable_basic_content_json'

In MigrateRunnerCommands.php line 458:

  migratable_basic_content_json migration: 3 failed.

The details in this are scant and offer no value.  To do so, you will need to get the migrate messages.

lando drush migrate:messages

If you have the following response

Not enough arguments (missing: "migrationId").

You are missing your id.  In the example above, I need to use migrate able_basic_content_json

lando drush migrate:messages migratable_basic_content_json

Response

 ------- --------------------------------------- ------------------- ------------------------------------------------------------------------
  Level   Source ID(s)                            Destination ID(s)   Message
 ------- --------------------------------------- ------------------- ------------------------------------------------------------------------
  1       Day 2 - Breakout session 3 livestream                       migratable_basic_content_json:field_tags:explode: NULL is not a string
  1       Subscription test                                           migratable_basic_content_json:field_tags:explode: NULL is not a string
  1       Subscription test - Media                                   migratable_basic_content_json:field_tags:explode: NULL is not a string
 ------- --------------------------------------- ------------------- ------------------------------------------------------------------------

Now we know what the issue is and where to focus attention.