RPM Support

The error is seen for repos with f26 content, those repos don't exist any more:
http://modularity.fedorainfracloud.org/modularity/compat/fedora-os-stream/
http://modularity.fedorainfracloud.org/modularity/compat/fedora-modular/

ValidationError (Modulemd:938e503c-9913-48e0-8ebd-c68791db80d0) (Field is required: ['context'])
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/pulp/server/db/manage.py", line 239, in main
    return _auto_manage_db(options)
  File "/usr/lib/python2.7/site-packages/pulp/server/db/manage.py", line 306, in _auto_manage_db
    migrate_database(options)
  File "/usr/lib/python2.7/site-packages/pulp/server/db/manage.py", line 135, in migrate_database
    update_current_version=not options.test)
  File "/usr/lib/python2.7/site-packages/pulp/server/db/migrate/models.py", line 189, in apply_migration
    migration.migrate()
  File "/usr/lib/python2.7/site-packages/pulp_rpm/plugins/migrations/0500_upstream_0043_add_modulemd_modulemd-defaults.py", line 343, in migrate
    add_modulemds(repository, modulemds, working_dir)
  File "/usr/lib/python2.7/site-packages/pulp_rpm/plugins/migrations/0500_upstream_0043_add_modulemd_modulemd-defaults.py", line 218, in add_modulemds
    add_modulemd(repository, modulemd, model, working_dir)
  File "/usr/lib/python2.7/site-packages/pulp_rpm/plugins/migrations/0500_upstream_0043_add_modulemd_modulemd-defaults.py", line 164, in add_modulemd
    model.save_and_import_content(path)
  File "/usr/lib/python2.7/site-packages/pulp/server/db/model/__init__.py", line 921, in save_and_import_content
    self.save()
  File "/usr/lib/python2.7/site-packages/mongoengine/document.py", line 304, in save
    self.validate(clean=clean)
  File "/usr/lib/python2.7/site-packages/mongoengine/base/document.py", line 413, in validate
    raise ValidationError(message, errors=errors)
ValidationError: ValidationError (Modulemd:938e503c-9913-48e0-8ebd-c68791db80d0) (Field is required: ['context'])

Modules in those repos have no context which is a part of unit_key for a modulemd content so it cant' be imported into Pulp.

Possible solutions:

• provide list of content for user to manually remove before migration
• skip this broken content and proceed with migration

• skipping it will mean that this content will be removed from a repo and become orphaned.

• anything else? I'm hesitant to keep bad modules.yaml files as unparsed yum_repo_metadata_file content for consistency reasons.

No data how many users might be affected. Hopefully not many since this issue didn't blow up earlier.