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Fix migration script not being able to run if it fails midway (#16312)

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* Fix migration script not being able to run if it fails midway

* Fix old migration script

* Fix old migration script

* Refactor CorruptionError
This commit is contained in:
Claire 2021-06-02 19:15:17 +02:00 • committed by GitHub
parent 526332c545
commit 11d3c065a5
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4 changed files with 39 additions and 13 deletions
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17
db/migrate/20200620164023_add_fixed_lowercase_index_to_accounts.rb
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@ -1,16 +1,10 @@
require Rails.root.join('lib', 'mastodon', 'migration_helpers')
class AddFixedLowercaseIndexToAccounts < ActiveRecord::Migration[5.2]
include Mastodon::MigrationHelpers
disable_ddl_transaction!
class CorruptionError < StandardError
def cause
nil
end
def backtrace
[]
end
end
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'
@ -21,7 +15,8 @@ class AddFixedLowercaseIndexToAccounts < ActiveRecord::Migration[5.2]
begin
add_index :accounts, "lower (username), COALESCE(lower(domain), '')", name: 'index_accounts_on_username_and_domain_lower', unique: true, algorithm: :concurrently
rescue ActiveRecord::RecordNotUnique
raise CorruptionError, 'Migration failed because of index corruption, see https://docs.joinmastodon.org/admin/troubleshooting/index-corruption/#fixing'
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')