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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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