63 lines
2.2 KiB
Ruby
63 lines
2.2 KiB
Ruby
# frozen_string_literal: true
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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
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# for more information on how to write migrations for GitLab.
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class MigrateDiscussionIdOnPromotedEpics < ActiveRecord::Migration[5.2]
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include Gitlab::Database::MigrationHelpers
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# We have ~5000 unique discussion_ids -> this migration will take about 102 minutes
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# (5000/100 * 2 minutes + 2 minutes initial delay) on gitlab.com.
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DOWNTIME = false
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BATCH_SIZE = 100
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DELAY_INTERVAL = 2.minutes
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MIGRATION = 'FixPromotedEpicsDiscussionIds'
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disable_ddl_transaction!
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class SystemNoteMetadata < ActiveRecord::Base
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self.table_name = 'system_note_metadata'
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self.inheritance_column = :_type_disabled
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end
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class Note < ActiveRecord::Base
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include EachBatch
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has_one :system_note_metadata, class_name: 'MigrateDiscussionIdOnPromotedEpics::SystemNoteMetadata'
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self.table_name = 'notes'
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self.inheritance_column = :_type_disabled
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def self.fetch_discussion_ids_query
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promoted_epics_query = Note
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.joins(:system_note_metadata)
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.where(system: true)
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.where(noteable_type: 'Epic')
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.where(system_note_metadata: { action: 'moved' })
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.select("DISTINCT noteable_id")
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Note.where(noteable_type: 'Epic')
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.where(noteable_id: promoted_epics_query)
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.distinct.pluck(:discussion_id)
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end
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end
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def up
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add_concurrent_index(:system_note_metadata, :note_id, where: "action='moved'", name: 'temp_index_system_note_metadata_on_moved_note_id')
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add_concurrent_index(:notes, [:id, :noteable_id], where: "noteable_type='Epic' AND system", name: 'temp_index_notes_on_id_and_noteable_id' )
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all_discussion_ids = Note.fetch_discussion_ids_query
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all_discussion_ids.in_groups_of(BATCH_SIZE, false).each_with_index do |ids, index|
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delay = DELAY_INTERVAL * (index + 1)
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BackgroundMigrationWorker.perform_in(delay, MIGRATION, [ids])
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end
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remove_concurrent_index(:system_note_metadata, :note_id, where: "action='moved'", name: 'temp_index_system_note_metadata_on_moved_note_id')
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remove_concurrent_index(:notes, [:id, :noteable_id], where: "noteable_type='Epic' AND system", name: 'temp_index_notes_on_id_and_noteable_id')
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end
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def down
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# no-op
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end
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end
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