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Fix AddUniqueIndexOnPreviewCardsStatuses
migration requiring PostgreSQL 12+ in some cases (#26737)
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@ -15,10 +15,22 @@ class AddUniqueIndexOnPreviewCardsStatuses < ActiveRecord::Migration[6.1]
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private
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def supports_concurrent_reindex?
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@supports_concurrent_reindex ||= begin
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version = select_one("SELECT current_setting('server_version_num') AS v")['v'].to_i
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version >= 12_000
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end
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end
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def deduplicate_and_reindex!
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deduplicate_preview_cards!
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safety_assured { execute 'REINDEX INDEX CONCURRENTLY preview_cards_statuses_pkey' }
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if supports_concurrent_reindex?
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safety_assured { execute 'REINDEX INDEX CONCURRENTLY preview_cards_statuses_pkey' }
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else
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remove_index :preview_cards_statuses, name: :preview_cards_statuses_pkey
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add_index :preview_cards_statuses, [:status_id, :preview_card_id], name: :preview_cards_statuses_pkey, algorithm: :concurrently, unique: true
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end
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rescue ActiveRecord::RecordNotUnique
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retry
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end
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