2016-06-16 10:53:32 +00:00
|
|
|
class RemoveDuplicatedKeys < ActiveRecord::Migration
|
|
|
|
def up
|
|
|
|
select_all("SELECT fingerprint FROM #{quote_table_name(:keys)} GROUP BY fingerprint HAVING COUNT(*) > 1").each do |row|
|
|
|
|
fingerprint = connection.quote(row['fingerprint'])
|
|
|
|
execute(%Q{
|
2016-06-29 20:09:27 +00:00
|
|
|
DELETE FROM #{quote_table_name(:keys)}
|
2016-06-16 10:53:32 +00:00
|
|
|
WHERE fingerprint = #{fingerprint}
|
|
|
|
AND id != (
|
|
|
|
SELECT id FROM (
|
|
|
|
SELECT max(id) AS id
|
2016-06-29 18:22:18 +00:00
|
|
|
FROM #{quote_table_name(:keys)}
|
2016-06-16 10:53:32 +00:00
|
|
|
WHERE fingerprint = #{fingerprint}
|
|
|
|
) max_ids
|
|
|
|
)
|
|
|
|
})
|
|
|
|
end
|
|
|
|
end
|
|
|
|
end
|