21 lines
770 B
Ruby
21 lines
770 B
Ruby
# frozen_string_literal: true
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class AddPrimaryKeyToPreviewCardsStatusesJoinTable < ActiveRecord::Migration[6.1]
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disable_ddl_transaction!
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def up
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safety_assured do
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execute 'ALTER TABLE preview_cards_statuses ADD PRIMARY KEY USING INDEX preview_cards_statuses_pkey'
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end
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end
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def down
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safety_assured do
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# I have found no way to demote the primary key to an index, instead, re-create the index
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execute 'CREATE UNIQUE INDEX CONCURRENTLY preview_cards_statuses_pkey_tmp ON preview_cards_statuses (status_id, preview_card_id)'
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execute 'ALTER TABLE preview_cards_statuses DROP CONSTRAINT preview_cards_statuses_pkey'
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execute 'ALTER INDEX preview_cards_statuses_pkey_tmp RENAME TO preview_cards_statuses_pkey'
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end
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end
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end
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