Browse Source

Fix old migration script not being able to run if it fails midway (#15361)

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

Improve the robustness of a migration script likely to fail because of database
corruption so it can run again once database corruptions are fixed.

* Display a specific error message in case of index corruption

Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
master
ThibG 10 months ago
committed by GitHub
parent
commit
052249588b
No known key found for this signature in database GPG Key ID: 4AEE18F83AFDEB23
  1. 26
      db/migrate/20200620164023_add_fixed_lowercase_index_to_accounts.rb

26
db/migrate/20200620164023_add_fixed_lowercase_index_to_accounts.rb

@ -1,10 +1,30 @@
class AddFixedLowercaseIndexToAccounts < ActiveRecord::Migration[5.2]
disable_ddl_transaction!
class CorruptionError < StandardError
def cause
nil
end
def backtrace
[]
end
end
def up
rename_index :accounts, 'index_accounts_on_username_and_domain_lower', 'old_index_accounts_on_username_and_domain_lower' unless index_name_exists?(:accounts, 'old_index_accounts_on_username_and_domain_lower')
add_index :accounts, "lower (username), COALESCE(lower(domain), '')", name: 'index_accounts_on_username_and_domain_lower', unique: true, algorithm: :concurrently
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') && 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
raise CorruptionError, 'Migration failed because of index corruption, see https://docs.joinmastodon.org/admin/troubleshooting/index-corruption/#fixing'
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

Loading…
Cancel
Save