Scald Atom migrate source

Is this patch still working? And if it is the case is it please possible to have some instruction about how to migrate scald to media entity? Thanks a lot, because I was expecting a much smoother migration process to D8.

Linking in #2906878: [Meta] Support for D7 -> D9 contrib migrate

Documentation on this would be much appreciated - an example migration to go along with this patch would be a huge help. Also +1 to Sahaj's question on whether this has been affected by any changes elsewhere.

For creating a fixture for any testing, see https://www.drupal.org/docs/8/api/migrate-api/generating-database-fixtur...

1. +++ b/src/Plugin/migrate/source/d7/ScaldAtom.php
   @@ -0,0 +1,85 @@
   + *   source_provider = "scald"
   

   This need a source_module too per https://www.drupal.org/node/2911881

2. +++ b/src/Plugin/migrate/source/d7/ScaldAtom.php
   @@ -0,0 +1,85 @@
   +      ->fields('s', array(
   

   Rather than list all the fields, can we simplify things and just grab all of them?

3. +++ b/src/Plugin/migrate/source/d7/ScaldAtom.php
   @@ -0,0 +1,85 @@
   +    if (isset($this->configuration['atom_type'])) {
   +      $query->condition('s.type', $this->configuration['atom_type']);
   

   This feels like a good case for a deriver. I could be wrong.

4. +++ b/src/Plugin/migrate/source/d7/ScaldAtom.php
   @@ -0,0 +1,85 @@
   +    foreach (array_keys($this->getFields('scald_atom', $row->getSourceProperty('type'))) as $field) {
   +      $sid = $row->getSourceProperty('sid');
   +      $row->setSourceProperty($field, $this->getFieldValues('scald_atom', $field, $sid));
   +    }
   

   Why is this needed? Transforms like this usually happen in a process section of the migration.

Moving this along a little, I hope...

Ugh, I'll try to re-roll that from scratch later today.

Re-rolled

Thanks to @jhodgdon updated patch here. Hopefully this'll work. ;)

Thanks to updated patch. I'm beginning a drupal 8 migration with scald media. Also i applied patch but no media was imported. Anyone could list steps necessary to follow for migrate scald from D7 to D8 ?
Thanks

I'm a bit lost as well. I've tried, unsuccessfully to install the patch on a clean drupal 8.5.3. Without being able to migrate my scald atoms, I'm not able to upgrade to 8 from 7! I'd really like to see an easy way to upgrade!

As @vitchy and @scsmith, I'm still lost on this.

Patch #16 do not seams to work on upgrade (I have tried from D7 to D8.6 dev), right?

As @vitchy requested 1 month ago, it would be very welcome to get a step by step tutorial on how to migrate Scald from D7 to D8. At least to know if this is really possible to perform at this moment (I mean, somebody succeeded at it ?) and to get some insights about what is required (are any contributed Migrate modules required?) to complete the task.

It is now 1 year that I'm trying to upgrade some sites using Scald to D8, first waiting for 8.4 and media in core to be released, hoping that it will solved the problem, then waiting for 8.5 for a better upgrade integration. And still I'm facing a wall. This is very frustrating.

Pretty sure the patch is really only going to work in a custom migration - you'll have to set the mappings and everything. There's no pure upgrade path for this since Scald was a dead end. This patch just makes the source available to migrations.

The patch works as expected. Here is an example with this patch, to migrate D7 Scald atom image to D8 media image:

uuid: a3b7c64e-0b09-4817-be44-3dab6f2f8c1e
langcode: fr
status: true
dependencies: {  }
id: upgrade_d7_scald_atom_image
class: null
field_plugin_method: null
cck_plugin_method: null
migration_tags:
- 'Drupal 7'
- Content
migration_group: migrate_drupal_7
label: 'Scald Atoms (image)'
source:
  plugin: d7_scald_atom
  atom_type: image
process:
  name: title
  field_media_image:
    plugin: migration_lookup
    migration: upgrade_d7_file
    source: base_id
  uid:
    plugin: default_value
    default_value: 0
destination:
  plugin: 'entity:media'
  default_bundle: image
migration_dependencies:
  optional:
  - upgrade_d7_file

I don't think it's reasonable to expect an out of the box Scald to Drupal 8 Media migration, given the priority and number of Scald sites and Scald providers, and in most cases, the fields will change.

I'm wondering whether this patch lives on Media Entity 2.x (there is nothing related to Media entity...) or in Scald 8 (module does not exist yet).

In case that #21 is not enough, here is the code snippet to migrate atom reference fields:

...
process:
  field_media_d8:
    plugin: sub_process
    source: field_atom_ref_d7
    process:
      target_id:
        plugin: migration_lookup
        migration: upgrade_d7_scald_atom_image
        source: sid
  ...

@jcisio you said:

I'm wondering whether this patch lives on Media Entity 2.x (there is nothing related to Media entity...) or in Scald 8 (module does not exist yet).

I'm also wondering that too! Also would like to know how to update that .php file for Media in core.

I'm really wiling to share a proper step by step guide to migrate Scald from D7 to Media in D8, but I need to be able to perform it at least once with basic configuration case.

Hi @sahaj, any updates on this? Were you able to carry out a migration? Thanks!

I made a contrib module to handle that: https://www.drupal.org/project/migrate_source_scald

Feel free to contribute :-)