discourse/db/migrate/20140725172830_remove_messa...

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class RemoveMessageFromPostAction < ActiveRecord::Migration[4.2]
def up
remove_column :post_actions, :message
end
def down
add_column :post_actions, :message, :text
execute "UPDATE post_actions
SET message = p.raw
FROM post_actions pa
LEFT JOIN posts p ON p.id = pa.related_post_id
WHERE post_actions.id = pa.id
AND pa.related_post_id IS NOT NULL;"
end
end