Need a way to easily 'override' or alter migration registration [#1996736]

I have a sample use case which I think others might have. I have written a platform distribution that includes a migration from its Drupal 6 version. For individual sites that use my platform, but have added extra fields to their content types, etc, they need to be able to 'alter' the platform migrations by extending the existing classes and add the support for the additional field mappings as needed. Currently I cannot find any way to do this, but I have investigated that adding an alter hook to hook_migrate_api() seems to be the best option.

Comment	File	Size	Author
#4	1996736-hook-migrate-api-alter-do-not-test.patch	1.61 KB	dave reid
#3	1996736-hook-migrate-api-alter-do-not-test.patch	1.61 KB	dave reid
#2	1996736-hook-migrate-api-alter-do-not-test.patch	1.82 KB	dave reid
#1	1996736-hook-migrate-api-alter.patch	1.43 KB	dave reid

Comments

Comment #1

dave reid

he/him

English

Nebraska USA

commented 16 May 2013 at 21:29

Status:

Active

» Needs review

Status	File	Size
new	1996736-hook-migrate-api-alter.patch	1.43 KB

Patch attached which adds the new alter hook. I think this is a great idea because it means that calculating dependencies works just great but I'm able to switch out the class easily:

/**
 * Implements hook_migrate_api_alter().
 */
function mymodule_migrate_api_alter(array &$info) {
  if (isset($info['other_module']['migrations']['OtherModule'])) {
    $info['other_module']['migrations']['OtherModule']['class_name'] = 'MyBetterOtherModuleMigration';
  }
}

class MyBetterOtherModuleMigration extends OtherModuleMigration {
  // Override __construct(), prepareRow(), prepare(), etc as needed.
}