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class MigrateAccountConversations < ActiveRecord::Migration[5.2]
disable_ddl_transaction!
class Mention < ApplicationRecord
belongs_to :account, inverse_of: :mentions
belongs_to :status, -> { unscope(where: :deleted_at) }
delegate(
:username,
:acct,
to: :account,
prefix: true
)
end
class Notification < ApplicationRecord
belongs_to :account, optional: true
belongs_to :activity, polymorphic: true, optional: true
belongs_to :status, foreign_type: 'Status', foreign_key: 'activity_id', optional: true
belongs_to :mention, foreign_type: 'Mention', foreign_key: 'activity_id', optional: true
def target_status
mention&.status
end
end
class AccountConversation < ApplicationRecord
belongs_to :account
belongs_to :conversation
belongs_to :last_status, -> { unscope(where: :deleted_at) }, class_name: 'Status'
before_validation :set_last_status
class << self
def add_status(recipient, status)
conversation = find_or_initialize_by(account: recipient, conversation_id: status.conversation_id, participant_account_ids: participants_from_status(recipient, status))
return conversation if conversation.status_ids.include?(status.id)
conversation.status_ids << status.id
conversation.unread = status.account_id != recipient.id
conversation.save
conversation
rescue ActiveRecord::StaleObjectError
retry
end
private
def participants_from_status(recipient, status)
((status.active_mentions.pluck(:account_id) + [status.account_id]).uniq - [recipient.id]).sort
end
end
private
def set_last_status
self.status_ids = status_ids.sort
self.last_status_id = status_ids.last
end
end
def up
say ''
say 'WARNING: This migration may take a *long* time for large instances'
say 'It will *not* lock tables for any significant time, but it may run'
say 'for a very long time. We will pause for 10 seconds to allow you to'
say 'interrupt this migration if you are not ready.'
say ''
10.downto(1) do |i|
say "Continuing in #{i} second#{i == 1 ? '' : 's'}...", true
sleep 1
end
migrated = 0
last_time = Time.zone.now
local_direct_statuses.includes(:account, mentions: :account).find_each do |status|
AccountConversation.add_status(status.account, status)
migrated += 1
if Time.zone.now - last_time > 1
say_progress(migrated)
last_time = Time.zone.now
end
end
notifications_about_direct_statuses.includes(:account, mention: { status: [:account, mentions: :account] }).find_each do |notification|
AccountConversation.add_status(notification.account, notification.target_status)
migrated += 1
if Time.zone.now - last_time > 1
say_progress(migrated)
last_time = Time.zone.now
end
end
end
def down
end
private
def say_progress(migrated)
say "Migrated #{migrated} rows", true
end
def local_direct_statuses
Status.unscoped.local.where(visibility: :direct)
end
def notifications_about_direct_statuses
Notification.joins('INNER JOIN mentions ON mentions.id = notifications.activity_id INNER JOIN statuses ON statuses.id = mentions.status_id').where(activity_type: 'Mention', statuses: { visibility: :direct })
end
end