mirror of https://github.com/mastodon/mastodon
25 lines
897 B
Ruby
25 lines
897 B
Ruby
# frozen_string_literal: true
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class AddPrimaryKeyToStatusesTagsJoinTable < ActiveRecord::Migration[6.1]
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disable_ddl_transaction!
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def up
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ActiveRecord::Base.transaction do
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safety_assured do
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execute 'ALTER TABLE statuses_tags ADD PRIMARY KEY USING INDEX index_statuses_tags_on_tag_id_and_status_id'
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# Rename for consistency as the primary key's name is not represented in db/schema.rb
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execute 'ALTER INDEX index_statuses_tags_on_tag_id_and_status_id RENAME TO statuses_tags_pkey'
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end
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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 index_statuses_tags_on_tag_id_and_status_id ON statuses_tags (tag_id, status_id)'
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execute 'ALTER TABLE statuses_tags DROP CONSTRAINT statuses_tags_pkey'
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end
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end
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end
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