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require Rails.root.join('lib', 'mastodon', 'migration_helpers')
class AddFixedLowercaseIndexToAccounts < ActiveRecord::Migration[5.2]
include Mastodon::MigrationHelpers
disable_ddl_transaction!
def up
if index_name_exists?(:accounts, 'old_index_accounts_on_username_and_domain_lower') && index_name_exists?(:accounts, 'index_accounts_on_username_and_domain_lower')
remove_index :accounts, name: 'index_accounts_on_username_and_domain_lower'
elsif index_name_exists?(:accounts, 'index_accounts_on_username_and_domain_lower')
rename_index :accounts, 'index_accounts_on_username_and_domain_lower', 'old_index_accounts_on_username_and_domain_lower'
end
begin
add_index :accounts, "lower (username), COALESCE(lower(domain), '')", name: 'index_accounts_on_username_and_domain_lower', unique: true, algorithm: :concurrently
rescue ActiveRecord::RecordNotUnique
remove_index :accounts, name: 'index_accounts_on_username_and_domain_lower'
raise CorruptionError
end
remove_index :accounts, name: 'old_index_accounts_on_username_and_domain_lower' if index_name_exists?(:accounts, 'old_index_accounts_on_username_and_domain_lower')
end
def down
add_index :accounts, 'lower (username), lower(domain)', name: 'old_index_accounts_on_username_and_domain_lower', unique: true, algorithm: :concurrently
remove_index :accounts, name: 'index_accounts_on_username_and_domain_lower'
rename_index :accounts, 'old_index_accounts_on_username_and_domain_lower', 'index_accounts_on_username_and_domain_lower'
end
end
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