2
You could also create a process plugin to create the Paragraph inline with the record you are migrating. I can't do piecemeal migrations in my case. The project has about 100,000 nodes and no data structure to 'create' Paragraphs out of. Even if I could, I don't want to have to run that dozens of times to get a full set of data.
Anyway.
Here is a real ...
1
I was able to accomplish this by creating a custom process plugin for the address field.
field_address:
-
plugin: myaddress
source:
locality: city
administrative_area: state
postal_code: postalcode
<?php
namespace Drupal\my_migration\Plugin\migrate\process;
use Drupal\migrate\MigrateExecutableInterface;
use ...
1
The following basically means
use the default process plugin get to look for a source column or constant named menu_link_content to determine the value for bundle.
process:
bundle: menu_link_content
which most likely returns null.
Try setting it with the default_value plugin instead:
process:
bundle:
plugin: default_value
default_value: ...
1
I got the same error when porting Drupal 8 to localhost.
In my case I found a solution visiting mysite/core/install.php location.
There I saw a detailed error: when backing up from /admin/config/development/backup_migrate some tables were missing. So I backed up full database from phpmyadmin, and problem was solved.
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