```ruby
# frozen_string_literal: true

namespace :courses_wikis do
  desc 'Creates CoursesWikis association for existing courses through revisions'
  task migrate: :environment do
    Rails.logger.debug 'Creating CoursesWikis associations'
    Course.all.each do |course|
      # The Course#wiki_ids method is removed
      # and hence its contents is used here.
      wiki_ids = ([course.home_wiki_id] + course.revisions.pluck(Arel.sql('DISTINCT wiki_id'))).uniq
      course.update(wikis: Wiki.find(wiki_ids))
    end
  end
end
```

Update CoursesWikis data migration task to use Assignments
user
```ruby
# frozen_string_literal: true

namespace :courses_wikis do
  desc 'Creates CoursesWikis association for existing courses through revisions'
  task migrate: :environment do
    Rails.logger.debug 'Creating CoursesWikis associations'
    default_wiki = Features.wiki_ed? ? [] : [Wiki.get_or_create(language: nil, project: 'wikidata')]

    Course.all.each do |course|
      # The Course#wiki_ids method is removed
      # and hence its contents is used here.
      wiki_ids = ([course.home_wiki_id] + [default_wiki] + course.assignments.pluck(:wiki_id))
      course.update(wikis: Wiki.find(wiki_ids))
    end
  end
end
```
assistant