Browse Source

Deal with collation-related index corruption (#14860)

* Add tootctl maintenance fix-duplicates

This tool goes through the database to detect and fix duplicates.
This operation is very slow and may cause data loss (of data that would be
inaccessible without intervention because of the existing index corruptions).
It tries its best to make sensible decisions, and asks the user in some cases.

* Add warning message in db:migrate hook

* Clear Rails cache after being done with database deduplication

Avoids followers hash cache being incorrect, among other things
master
ThibG 10 months ago
committed by GitHub
parent
commit
1242e57c27
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  1. 4
      lib/cli.rb
  2. 610
      lib/mastodon/maintenance_cli.rb
  3. 11
      lib/tasks/db.rake

4
lib/cli.rb

@ -14,6 +14,7 @@ require_relative 'mastodon/cache_cli'
require_relative 'mastodon/upgrade_cli'
require_relative 'mastodon/email_domain_blocks_cli'
require_relative 'mastodon/ip_blocks_cli'
require_relative 'mastodon/maintenance_cli'
require_relative 'mastodon/version'
module Mastodon
@ -61,6 +62,9 @@ module Mastodon
desc 'ip_blocks SUBCOMMAND ...ARGS', 'Manage IP blocks'
subcommand 'ip_blocks', Mastodon::IpBlocksCLI
desc 'maintenance SUBCOMMAND ...ARGS', 'Various maintenance utilities'
subcommand 'maintenance', Mastodon::MaintenanceCLI
option :dry_run, type: :boolean
desc 'self-destruct', 'Erase the server from the federation'
long_desc <<~LONG_DESC

610
lib/mastodon/maintenance_cli.rb

@ -0,0 +1,610 @@
# frozen_string_literal: true
require 'tty-prompt'
require_relative '../../config/boot'
require_relative '../../config/environment'
require_relative 'cli_helper'
module Mastodon
class MaintenanceCLI < Thor
include CLIHelper
def self.exit_on_failure?
true
end
MIN_SUPPORTED_VERSION = 2019_10_01_213028
MAX_SUPPORTED_VERSION = 2020_10_17_234926
# Stubs to enjoy ActiveRecord queries while not depending on a particular
# version of the code/database
class Status < ApplicationRecord; end
class StatusPin < ApplicationRecord; end
class Poll < ApplicationRecord; end
class Report < ApplicationRecord; end
class Tombstone < ApplicationRecord; end
class Favourite < ApplicationRecord; end
class Follow < ApplicationRecord; end
class FollowRequest < ApplicationRecord; end
class Block < ApplicationRecord; end
class Mute < ApplicationRecord; end
class AccountIdentityProof < ApplicationRecord; end
class AccountModerationNote < ApplicationRecord; end
class AccountPin < ApplicationRecord; end
class ListAccount < ApplicationRecord; end
class PollVote < ApplicationRecord; end
class Mention < ApplicationRecord; end
class AccountDomainBlock < ApplicationRecord; end
class AnnouncementReaction < ApplicationRecord; end
class FeaturedTag < ApplicationRecord; end
class CustomEmoji < ApplicationRecord; end
class CustomEmojiCategory < ApplicationRecord; end
class Bookmark < ApplicationRecord; end
class WebauthnCredential < ApplicationRecord; end
class PreviewCard < ApplicationRecord
self.inheritance_column = false
end
class MediaAttachment < ApplicationRecord
self.inheritance_column = nil
end
class AccountStat < ApplicationRecord
belongs_to :account, inverse_of: :account_stat
end
class Account < ApplicationRecord
# Dummy class, to make migration possible across version changes
has_one :user, inverse_of: :account
has_one :account_stat, inverse_of: :account
scope :local, -> { where(domain: nil) }
def local?
domain.nil?
end
def acct
local? ? username : "#{username}@#{domain}"
end
end
class User < ApplicationRecord
belongs_to :account, inverse_of: :user
end
desc 'fix-duplicates', 'Fix duplicates in database and rebuild indexes'
long_desc <<~LONG_DESC
Delete or merge duplicate accounts, statuses, emojis, etc. and rebuild indexes.
This is useful if your database indexes are corrupted because of issues such as https://wiki.postgresql.org/wiki/Locale_data_changes
Mastodon has to be stopped to run this task, which will take a long time and may be destructive.
LONG_DESC
def fix_duplicates
@prompt = TTY::Prompt.new
if ActiveRecord::Migrator.current_version < MIN_SUPPORTED_VERSION
@prompt.warn 'Your version of the database schema is too old and is not supported by this script.'
@prompt.warn 'Please update to at least Mastodon 3.0.0 before running this script.'
exit(1)
elsif ActiveRecord::Migrator.current_version > MAX_SUPPORTED_VERSION
@prompt.warn 'Your version of the database schema is more recent than this script, this may cause unexpected errors.'
exit(1) unless @prompt.yes?('Continue anyway?')
end
@prompt.warn 'This task will take a long time to run and is potentially destructive.'
@prompt.warn 'Please make sure to stop Mastodon and have a backup.'
exit(1) unless @prompt.yes?('Continue?')
deduplicate_accounts!
deduplicate_users!
deduplicate_account_domain_blocks!
deduplicate_account_identity_proofs!
deduplicate_announcement_reactions!
deduplicate_conversations!
deduplicate_custom_emojis!
deduplicate_custom_emoji_categories!
deduplicate_domain_allows!
deduplicate_domain_blocks!
deduplicate_unavailable_domains!
deduplicate_email_domain_blocks!
deduplicate_media_attachments!
deduplicate_preview_cards!
deduplicate_statuses!
deduplicate_tags!
deduplicate_webauthn_credentials!
Rails.cache.clear
@prompt.say 'Finished!'
end
private
def deduplicate_accounts!
remove_index_if_exists!(:accounts, 'index_accounts_on_username_and_domain_lower')
@prompt.say 'Deduplicating accounts… for local accounts, you will be asked to chose which account to keep unchanged.'
find_duplicate_accounts.each do |row|
accounts = Account.where(id: row['ids'].split(',')).to_a
if accounts.first.local?
deduplicate_local_accounts!(accounts)
else
deduplicate_remote_accounts!(accounts)
end
end
@prompt.say 'Restoring index_accounts_on_username_and_domain_lower…'
if ActiveRecord::Migrator.current_version < 20200620164023
ActiveRecord::Base.connection.add_index :accounts, 'lower (username), lower(domain)', name: 'index_accounts_on_username_and_domain_lower', unique: true
else
ActiveRecord::Base.connection.add_index :accounts, "lower (username), COALESCE(lower(domain), '')", name: 'index_accounts_on_username_and_domain_lower', unique: true
end
end
def deduplicate_users!
remove_index_if_exists!(:users, 'index_users_on_confirmation_token')
remove_index_if_exists!(:users, 'index_users_on_email')
remove_index_if_exists!(:users, 'index_users_on_remember_token')
remove_index_if_exists!(:users, 'index_users_on_reset_password_token')
@prompt.say 'Deduplicating user records…'
# Deduplicating email
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM users GROUP BY email HAVING count(*) > 1").each do |row|
users = User.where(id: row['ids'].split(',')).sort_by(&:updated_at).reverse
ref_user = users.shift
@prompt.warn "Multiple users registered with e-mail address #{ref_user.email}."
@prompt.warn "e-mail will be disabled for the following accounts: #{user.map(&:account).map(&:acct).join(', ')}"
@prompt.warn 'Please reach out to them and set another address with `tootctl account modify` or delete them.'
i = 0
users.each do |user|
user.update!(email: "#{i} " + user.email)
end
end
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM users WHERE confirmation_token IS NOT NULL GROUP BY confirmation_token HAVING count(*) > 1").each do |row|
users = User.where(id: row['ids'].split(',')).sort_by(&:created_at).reverse.drop(1)
@prompt.warn "Unsetting confirmation token for those accounts: #{users.map(&:account).map(&:acct).join(', ')}"
users.each do |user|
user.update!(confirmation_token: nil)
end
end
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM users WHERE remember_token IS NOT NULL GROUP BY remember_token HAVING count(*) > 1").each do |row|
users = User.where(id: row['ids'].split(',')).sort_by(&:updated_at).reverse.drop(1)
@prompt.warn "Unsetting remember token for those accounts: #{users.map(&:account).map(&:acct).join(', ')}"
users.each do |user|
user.update!(remember_token: nil)
end
end
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM users WHERE reset_password_token IS NOT NULL GROUP BY reset_password_token HAVING count(*) > 1").each do |row|
users = User.where(id: row['ids'].split(',')).sort_by(&:updated_at).reverse.drop(1)
@prompt.warn "Unsetting password reset token for those accounts: #{users.map(&:account).map(&:acct).join(', ')}"
users.each do |user|
user.update!(reset_password_token: nil)
end
end
@prompt.say 'Restoring users indexes…'
ActiveRecord::Base.connection.add_index :users, ['confirmation_token'], name: 'index_users_on_confirmation_token', unique: true
ActiveRecord::Base.connection.add_index :users, ['email'], name: 'index_users_on_email', unique: true
ActiveRecord::Base.connection.add_index :users, ['remember_token'], name: 'index_users_on_remember_token', unique: true
ActiveRecord::Base.connection.add_index :users, ['reset_password_token'], name: 'index_users_on_reset_password_token', unique: true
end
def deduplicate_account_domain_blocks!
remove_index_if_exists!(:account_domain_blocks, 'index_account_domain_blocks_on_account_id_and_domain')
@prompt.say 'Removing duplicate account domain blocks…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM account_domain_blocks GROUP BY account_id, domain HAVING count(*) > 1").each do |row|
AccountDomainBlock.where(id: row['ids'].split(',').drop(1)).delete_all
end
@prompt.say 'Restoring account domain blocks indexes…'
ActiveRecord::Base.connection.add_index :account_domain_blocks, ['account_id', 'domain'], name: 'index_account_domain_blocks_on_account_id_and_domain', unique: true
end
def deduplicate_account_identity_proofs!
remove_index_if_exists!(:account_identity_proofs, 'index_account_proofs_on_account_and_provider_and_username')
@prompt.say 'Removing duplicate account identity proofs…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM account_identity_proofs GROUP BY account_id, provider, provider_username HAVING count(*) > 1").each do |row|
AccountIdentityProof.where(id: row['ids'].split(',')).sort_by(&:id).reverse.drop(1).each(&:destroy)
end
@prompt.say 'Restoring account identity proofs indexes…'
ActiveRecord::Base.connection.add_index :account_identity_proofs, ['account_id', 'provider', 'provider_username'], name: 'index_account_proofs_on_account_and_provider_and_username', unique: true
end
def deduplicate_announcement_reactions!
return unless ActiveRecord::Base.connection.table_exists?(:announcement_reactions)
remove_index_if_exists!(:announcement_reactions, 'index_announcement_reactions_on_account_id_and_announcement_id')
@prompt.say 'Removing duplicate account identity proofs…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM announcement_reactions GROUP BY account_id, announcement_id, name HAVING count(*) > 1").each do |row|
AnnouncementReaction.where(id: row['ids'].split(',')).sort_by(&:id).reverse.drop(1).each(&:destroy)
end
@prompt.say 'Restoring announcement_reactions indexes…'
ActiveRecord::Base.connection.add_index :announcement_reactions, ['account_id', 'announcement_id', 'name'], name: 'index_announcement_reactions_on_account_id_and_announcement_id', unique: true
end
def deduplicate_conversations!
remove_index_if_exists!(:conversations, 'index_conversations_on_uri')
@prompt.say 'Deduplicating conversations…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM conversations WHERE uri IS NOT NULL GROUP BY uri HAVING count(*) > 1").each do |row|
conversations = Conversation.where(id: row['ids'].split(',')).sort_by(&:id).reverse
ref_conversation = conversations.shift
conversations.each do |other|
merge_conversations!(ref_conversation, other)
other.destroy
end
end
@prompt.say 'Restoring conversations indexes…'
ActiveRecord::Base.connection.add_index :conversations, ['uri'], name: 'index_conversations_on_uri', unique: true
end
def deduplicate_custom_emojis!
remove_index_if_exists!(:custom_emojis, 'index_custom_emojis_on_shortcode_and_domain')
@prompt.say 'Deduplicating custom_emojis…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM custom_emojis GROUP BY shortcode, domain HAVING count(*) > 1").each do |row|
emojis = CustomEmoji.where(id: row['ids'].split(',')).sort_by(&:id).reverse
ref_emoji = emojis.shift
emojis.each do |other|
merge_custom_emojis!(ref_emoji, other)
other.destroy
end
end
@prompt.say 'Restoring custom_emojis indexes…'
ActiveRecord::Base.connection.add_index :custom_emojis, ['shortcode', 'domain'], name: 'index_custom_emojis_on_shortcode_and_domain', unique: true
end
def deduplicate_custom_emoji_categories!
remove_index_if_exists!(:custom_emoji_categories, 'index_custom_emoji_categories_on_name')
@prompt.say 'Deduplicating custom_emoji_categories…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM custom_emoji_categories GROUP BY name HAVING count(*) > 1").each do |row|
categories = CustomEmojiCategory.where(id: row['ids'].split(',')).sort_by(&:id).reverse
ref_category = categories.shift
categories.each do |other|
merge_custom_emoji_categories!(ref_category, other)
other.destroy
end
end
@prompt.say 'Restoring custom_emoji_categories indexes…'
ActiveRecord::Base.connection.add_index :custom_emoji_categories, ['name'], name: 'index_custom_emoji_categories_on_name', unique: true
end
def deduplicate_domain_allows!
remove_index_if_exists!(:domain_allows, 'index_domain_allows_on_domain')
@prompt.say 'Deduplicating domain_allows…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM domain_allows GROUP BY domain HAVING count(*) > 1").each do |row|
DomainAllow.where(id: row['ids'].split(',')).sort_by(&:id).reverse.drop(1).each(&:destroy)
end
@prompt.say 'Restoring domain_allows indexes…'
ActiveRecord::Base.connection.add_index :domain_allows, ['domain'], name: 'index_domain_allows_on_domain', unique: true
end
def deduplicate_domain_blocks!
remove_index_if_exists!(:domain_blocks, 'index_domain_blocks_on_domain')
@prompt.say 'Deduplicating domain_allows…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM domain_blocks GROUP BY domain HAVING count(*) > 1").each do |row|
domain_blocks = DomainBlock.where(id: row['ids'].split(',')).by_severity.reverse.to_a
reject_media = domain_blocks.any?(&:reject_media?)
reject_reports = domain_blocks.any?(&:reject_reports?)
reference_block = domain_blocks.shift
private_comment = domain_blocks.reduce(reference_block.private_comment.presence) { |a, b| a || b.private_comment.presence }
public_comment = domain_blocks.reduce(reference_block.public_comment.presence) { |a, b| a || b.public_comment.presence }
reference_block.update!(reject_media: reject_media, reject_reports: reject_reports, private_comment: private_comment, public_comment: public_comment)
domain_blocks.each(&:destroy)
end
@prompt.say 'Restoring domain_blocks indexes…'
ActiveRecord::Base.connection.add_index :domain_blocks, ['domain'], name: 'index_domain_blocks_on_domain', unique: true
end
def deduplicate_unavailable_domains!
return unless ActiveRecord::Base.connection.table_exists?(:unavailable_domains)
remove_index_if_exists!(:unavailable_domains, 'index_unavailable_domains_on_domain')
@prompt.say 'Deduplicating unavailable_domains…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM unavailable_domains GROUP BY domain HAVING count(*) > 1").each do |row|
UnavailableDomain.where(id: row['ids'].split(',')).sort_by(&:id).reverse.drop(1).each(&:destroy)
end
@prompt.say 'Restoring domain_allows indexes…'
ActiveRecord::Base.connection.add_index :unavailable_domains, ['domain'], name: 'index_unavailable_domains_on_domain', unique: true
end
def deduplicate_email_domain_blocks!
remove_index_if_exists!(:email_domain_blocks, 'index_email_domain_blocks_on_domain')
@prompt.say 'Deduplicating email_domain_blocks…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM email_domain_blocks GROUP BY domain HAVING count(*) > 1").each do |row|
domain_blocks = EmailDomainBlock.where(id: row['ids'].split(',')).sort_by { |b| b.parent.nil? ? 1 : 0 }.to_a
domain_blocks.drop(1).each(&:destroy)
end
@prompt.say 'Restoring email_domain_blocks indexes…'
ActiveRecord::Base.connection.add_index :email_domain_blocks, ['domain'], name: 'index_email_domain_blocks_on_domain', unique: true
end
def deduplicate_media_attachments!
remove_index_if_exists!(:media_attachments, 'index_media_attachments_on_shortcode')
@prompt.say 'Deduplicating media_attachments…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM media_attachments WHERE shortcode IS NOT NULL GROUP BY shortcode HAVING count(*) > 1").each do |row|
MediaAttachment.where(id: row['ids'].split(',').drop(1)).update_all(shortcode: nil)
end
@prompt.say 'Restoring media_attachments indexes…'
ActiveRecord::Base.connection.add_index :media_attachments, ['shortcode'], name: 'index_media_attachments_on_shortcode', unique: true
end
def deduplicate_preview_cards!
remove_index_if_exists!(:preview_cards, 'index_preview_cards_on_url')
@prompt.say 'Deduplicating preview_cards…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM preview_cards GROUP BY url HAVING count(*) > 1").each do |row|
PreviewCard.where(id: row['ids'].split(',')).sort_by(&:id).reverse.drop(1).each(&:destroy)
end
@prompt.say 'Restoring preview_cards indexes…'
ActiveRecord::Base.connection.add_index :preview_cards, ['url'], name: 'index_preview_cards_on_url', unique: true
end
def deduplicate_statuses!
remove_index_if_exists!(:statuses, 'index_statuses_on_uri')
@prompt.say 'Deduplicating statuses…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM statuses WHERE uri IS NOT NULL GROUP BY uri HAVING count(*) > 1").each do |row|
statuses = Status.where(id: row['ids'].split(',')).sort_by(&:id)
ref_status = statuses.shift
statuses.each do |status|
merge_statuses!(ref_status, status) if status.account_id == ref_status.account_id
status.destroy
end
end
@prompt.say 'Restoring statuses indexes…'
ActiveRecord::Base.connection.add_index :statuses, ['uri'], name: 'index_statuses_on_uri', unique: true
end
def deduplicate_tags!
remove_index_if_exists!(:tags, 'index_tags_on_name_lower')
@prompt.say 'Deduplicating tags…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM tags GROUP BY lower((name)::text) HAVING count(*) > 1").each do |row|
tags = Tag.where(id: row['ids'].split(',')).sort_by { |t| [t.usable?, t.trendable?, t.listable?].count(false) }
ref_tag = tags.shift
tags.each do |tag|
merge_tags!(ref_tag, tag)
tag.destroy
end
end
@prompt.say 'Restoring tags indexes…'
ActiveRecord::Base.connection.add_index :tags, 'lower((name)::text)', name: 'index_tags_on_name_lower', unique: true
end
def deduplicate_webauthn_credentials!
return unless ActiveRecord::Base.connection.table_exists?(:webauthn_credentials)
remove_index_if_exists!(:webauthn_credentials, 'index_webauthn_credentials_on_external_id')
@prompt.say 'Deduplicating webauthn_credentials…'
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM webauthn_credentials GROUP BY external_id HAVING count(*) > 1").each do |row|
WebauthnCredential.where(id: row['ids'].split(',')).sort_by(&:id).reverse.drop(1).each(&:destroy)
end
@prompt.say 'Restoring webauthn_credentials indexes…'
ActiveRecord::Base.connection.add_index :webauthn_credentials, ['external_id'], name: 'index_webauthn_credentials_on_external_id', unique: true
end
def deduplicate_local_accounts!(accounts)
accounts = accounts.sort_by(&:id).reverse
@prompt.warn "Multiple local accounts were found for username '#{accounts.first.username}'."
@prompt.warn 'All those accounts are distinct accounts but only the most recently-created one is fully-functionnal.'
accounts.each_with_index do |account, idx|
@prompt.say '%2d. %s: created at: %s; updated at: %s; last logged in at: %s; statuses: %5d; last status at: %s' % [idx, account.username, account.created_at, account.updated_at, account.user&.last_sign_in_at&.to_s || 'N/A', account.account_stat&.statuses_count || 0, account.account_stat&.last_status_at || 'N/A']
end
@prompt.say 'Please chose the one to keep unchanged, other ones will be automatically renamed.'
ref_id = @prompt.ask('Account to keep unchanged:') do |q|
q.required true
q.default 0
q.convert :int
end
accounts.delete_at(ref_id)
i = 0
accounts.each do |account|
i += 1
username = account.username + "_#{i}"
while Account.local.exists?(username: username)
i += 1
username = account.username + "_#{i}"
end
account.update!(username: username)
end
end
def deduplicate_remote_accounts!(accounts)
accounts = accounts.sort_by(&:updated_at).reverse
reference_account = accounts.shift
accounts.each do |other_account|
if other_account.public_key == reference_account.public_key
# The accounts definitely point to the same resource, so
# it's safe to re-attribute content and relationships
merge_accounts!(reference_account, other_account)
end
other_account.destroy
end
end
def merge_accounts!(main_account, duplicate_account)
# Since it's the same remote resource, the remote resource likely
# already believes we are following/blocking, so it's safe to
# re-attribute the relationships too. However, during the presence
# of the index bug users could have *also* followed the reference
# account already, therefore mass update will not work and we need
# to check for (and skip past) uniqueness errors
owned_classes = [
Status, StatusPin, MediaAttachment, Poll, Report, Tombstone, Favourite,
Follow, FollowRequest, Block, Mute, AccountIdentityProof,
AccountModerationNote, AccountPin, AccountStat, ListAccount,
PollVote, Mention
]
owned_classes.each do |klass|
klass.where(account_id: duplicate_account.id).find_each do |record|
begin
record.update_attribute(:account_id, main_account.id)
rescue ActiveRecord::RecordNotUnique
next
end
end
end
target_classes = [Follow, FollowRequest, Block, Mute, AccountModerationNote, AccountPin]
target_classes.each do |klass|
klass.where(target_account_id: duplicate_account.id).find_each do |record|
begin
record.update_attribute(:target_account_id, main_account.id)
rescue ActiveRecord::RecordNotUnique
next
end
end
end
end
def merge_conversations!(main_conv, duplicate_conv)
owned_classes = [ConversationMute, AccountConversation]
owned_classes.each do |klass|
klass.where(conversation_id: duplicate_conv.id).find_each do |record|
begin
record.update_attribute(:account_id, main_conv.id)
rescue ActiveRecord::RecordNotUnique
next
end
end
end
end
def merge_custom_emojis!(main_emoji, duplicate_emoji)
owned_classes = [AnnouncementReaction]
owned_classes.each do |klass|
klass.where(custom_emoji_id: duplicate_emoji.id).update_all(custom_emoji_id: main_emoji.id)
end
end
def merge_custom_emoji_categories!(main_category, duplicate_category)
owned_classes = [CustomEmoji]
owned_classes.each do |klass|
klass.where(category_id: duplicate_category.id).update_all(category_id: main_category.id)
end
end
def merge_statuses!(main_status, duplicate_status)
owned_classes = [Favourite, Mention, Poll]
owned_classes << Bookmark if ActiveRecord::Base.connection.table_exists?(:bookmarks)
owned_classes.each do |klass|
klass.where(status_id: duplicate_status.id).find_each do |record|
begin
record.update_attribute(:status_id, main_status.id)
rescue ActiveRecord::RecordNotUnique
next
end
end
end
StatusPin.where(account_id: main_status.account_id, status_id: duplicate_status.id).find_each do |record|
begin
record.update_attribute(:status_id, main_status.id)
rescue ActiveRecord::RecordNotUnique
next
end
end
Status.where(in_reply_to_id: duplicate_status.id).find_each do |record|
begin
record.update_attribute(:in_reply_to_id, main_status.id)
rescue ActiveRecord::RecordNotUnique
next
end
end
Status.where(reblog_of_id: duplicate_status.id).find_each do |record|
begin
record.update_attribute(:reblog_of_id, main_status.id)
rescue ActiveRecord::RecordNotUnique
next
end
end
end
def merge_tags!(main_tag, duplicate_tag)
[FeaturedTag].each do |klass|
klass.where(tag_id: duplicate_tag.id).find_each do |record|
begin
record.update_attribute(:tag_id, main_tag.id)
rescue ActiveRecord::RecordNotUnique
next
end
end
end
end
def find_duplicate_accounts
ActiveRecord::Base.connection.select_all("SELECT string_agg(id::text, ',') AS ids FROM accounts GROUP BY lower(username), COALESCE(lower(domain), '') HAVING count(*) > 1")
end
def remove_index_if_exists!(table, name)
ActiveRecord::Base.connection.remove_index(table, name: name)
rescue ArgumentError
nil
rescue ActiveRecord::StatementInvalid
nil
end
end
end

11
lib/tasks/db.rake

@ -48,6 +48,17 @@ namespace :db do
end
end
task :post_migration_hook do
at_exit do
unless %w(C POSIX).include?(ActiveRecord::Base.connection.execute('SELECT datcollate FROM pg_database WHERE datname = current_database();').first['datcollate'])
Rails.logger.warn 'WARNING: Your database is using an unsafe collation setting, which might result in index corruption.'
Rails.logger.warn 'WARNING: See https://docs.joinmastodon.org/admin/troubleshooting/index-corruption/#am-i-affected'
end
end
end
Rake::Task['db:migrate'].enhance(['db:post_migration_hook'])
# Before we load the schema, define the timestamp_id function.
# Idiomatically, we might do this in a migration, but then it
# wouldn't end up in schema.rb, so we'd need to figure out a way to

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