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21 lines
536 B
Ruby
21 lines
536 B
Ruby
# frozen_string_literal:true
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class SingleizeEventCategories < ActiveRecord::Migration[4.2]
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def up
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execute 'UPDATE events AS e
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SET category_id = ec.category_id
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FROM events_categories AS ec
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WHERE e.id = ec.event_id;'
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end
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def down
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execute 'INSERT INTO events_categories
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(event_id, category_id, created_at, updated_at)
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SELECT id, category_id, now(), now()
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FROM events;'
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execute 'UPDATE events
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SET category_id = NULL;'
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end
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end
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