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- class AddIndexFeaturedTagsOnAccountIdAndTagId < ActiveRecord::Migration[6.1]
- disable_ddl_transaction!
- def up
- duplicates = FeaturedTag.connection.select_all('SELECT string_agg(id::text, \',\') AS ids FROM featured_tags GROUP BY account_id, tag_id HAVING count(*) > 1').to_ary
- duplicates.each do |row|
- FeaturedTag.where(id: row['ids'].split(',')[0...-1]).destroy_all
- end
- add_index :featured_tags, [:account_id, :tag_id], unique: true, algorithm: :concurrently
- remove_index :featured_tags, [:account_id], algorithm: :concurrently
- end
- def down
- add_index :featured_tags, [:account_id], algorithm: :concurrently
- remove_index :featured_tags, [:account_id, :tag_id], unique: true, algorithm: :concurrently
- end
- end
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