Saw the other issue #3208279: Undefined index: plugin at src/MigrationHelper.php:35 but it turns out, mine is different. The error message is

In DiscoveryTrait.php line 53:
                                                                                                                                                  
  The "" plugin does not exist. Valid plugin IDs for Drupal\migrate_plus\DataParserPluginManager are: my_custom_plugin, json, simple_xml, xml, soap

When I remove the plugin alter, everything is back to normal.

CommentFileSizeAuthor
#9 inline_entity_form-n3208995-9.patch581 bytesdamienmckenna
#6 3208995-6.patch583 bytesjunaidpv

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jurgenhaas created an issue. See original summary.

jurgenhaas opened merge request !23

pcate’s picture

pcate commented

I ran into this migration issue as well. It was causing all imports to fail. I needed both this patch and the one in https://www.drupal.org/project/inline_entity_form/issues/3208279 to resolve the issue.

sjhuskey’s picture

sjhuskey commented

This solution worked for me. I was getting `The "" plugin does not exist.` related to Inline Entity Form. After installing this branch, those errors were gone.

geek-merlin’s picture

geek-merlin
Primary language German
Location Freiburg, Germany
commented
Status: Active » Postponed (maintainer needs more info)
Related issues: +#3221074: Implemented hook_migration_plugins_alter() breaks migrations, if shared configuration used in migration configs.

Does the related issue fix this?

junaidpv’s picture

junaidpv
Location Kannur, Kerala
commented
StatusFileSize
new 3208995-6.patch583 bytes

Above MR as patch file.

jurgenhaas’s picture

jurgenhaas
he/him
Primary language German
Location Gottmadingen
commented

Re-rolled the MR for the latest code changes.

geek-merlin’s picture

geek-merlin
Primary language German
Location Freiburg, Germany
commented
Parent issue: » #3272784: 3272784-migration-meta-issue-combined
damienmckenna’s picture

damienmckenna
Location TN, USA
commented
StatusFileSize
new inline_entity_form-n3208995-9.patch581 bytes

The updated MR in patch format.

damienmckenna’s picture

damienmckenna
Location TN, USA
commented
Version: 8.x-1.0-rc9 » 8.x-1.x-dev
geek-merlin’s picture

geek-merlin
Primary language German
Location Freiburg, Germany
commented

Too many migration issues, many of which look overlapping or duplicate.
Postponing on parent issue.

anybody’s picture

anybody
Primary language German
Location Porta Westfalica
commented
Status: Postponed (maintainer needs more info) » Closed (duplicate)
Related issues: +#3208279: Undefined index: plugin at src/MigrationHelper.php:35

99% sure I think this is a duplicate of #3221074: Implemented hook_migration_plugins_alter() breaks migrations, if shared configuration used in migration configs. which is the root cause of issue reported in core migration system: #3275819: Provide useful error message for: The "" plugin does not exist on Drupal 6 / 7 migrations (but isn't a core bug I think, but created by inline_entity_form).

Maintainers should have a look, but I think this should be closed as duplicate of #3221074: Implemented hook_migration_plugins_alter() breaks migrations, if shared configuration used in migration configs. and we should proceed there, as this issue just contains quickfixes, no solutions.

#3208279: Undefined index: plugin at src/MigrationHelper.php:35 was also closed as duplicate of #3221074: Implemented hook_migration_plugins_alter() breaks migrations, if shared configuration used in migration configs.. So I hope it's okay to do that @Axel?

BTW as this is indeed Major for migrations and hard to find, I'll set the other issue Major now.

jurgenhaas closed merge request !23