Blog Archives

Migrating a Drupal 7 User Profile2 Image Field to a Drupal 8 User Image Field

Consider this scenario: Drupal 7 site contains Profile2 profile called person with image field called field_oldsite_person_image. Users each have a profile2 profile associated with their account. Drupal 8 site has an image field called field_newsite_user_photo on the user entity itself. If you need to

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Posted in Development

Quick Tips for a Drupal 7 to Drupal 8 Migration

Here are a few quick tips for a Drupal 7 to Drupal 8 migration. I will add more over time; admittedly it’s pretty lame right now! For general Drupal 8 Migrate API tips, you may also want to check out

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Only Migrating Published Nodes in a D7 to D8 Migration

I’m not going into much detail here but hopefully this helps someone. If you need to migrate only published nodes you can extend the d7_node plugin and add a condition to the query. First, create a file in your module like /modules/custom/mysite_migrate/src/Plugin/migrate/source/MysiteNewsNode.php

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Posted in Tech Tips

Using GROUP_CONCAT to Combine Rows in a Drupal Query

Recently I was working on a D7 to D8 migration. I was trying to import news items and their taxonomy terms (among many other things). To make things simple I wanted the query results to have (for each node) a

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Send email after Migrate Import in Drupal 8

Here’s an example of a barebones event subscriber to send an email when a Drupal migration finishes importing. The success vs failure logic isn’t working correctly, but you’ll get the gist. If you come up with a solution for this please

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Drupal 8 Migrate Process Plugin: migration_lookup_target_ids

I was having some difficulties using the migration_lookup process plugin. I wrote this plugin so that I could make sense of how the migration lookup was working and the data that it was returning. The plugin ended up being something

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Drupal 8 Migrate – Tips and Tricks

This is an ongoing brain dump of quick tips for working with Drupal 8 Migrate. These items may seem true to me as I’m writing them today, but I’m constantly being reminded that things aren’t always as they seem with Migrate.

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Extending the Migrate Plus JSON Parser in Drupal 8

The migrate_plus module provides a great JSON parser for easy migration of JSON data. With a small amount of code in a new class you can tweak the parser a bit. In my case I wanted to make a few simple

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Monitoring a Drupal 8 Migration Executed with Drush

Update 2 is proving to be the most useful method. Update 1 Somehow I missed the documentation regarding the --feedback  argument for the drush mi  command. It’s similar to the methods below in that it helps you see that the migration is

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Alter Date Format in a Drupal 8 Migration

Per https://www.drupal.org/node/2820490 you can now use the format_date plugin to alter date formats like this:

I do always recommend using skip_on_empty before any other process plugins.

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