34 lines
870 B
Ruby
34 lines
870 B
Ruby
# rubocop:disable all
|
|
class RemoveDuplicatedNotificationSettings < ActiveRecord::Migration
|
|
def up
|
|
duplicates = exec_query(%Q{
|
|
SELECT user_id, source_type, source_id
|
|
FROM notification_settings
|
|
GROUP BY user_id, source_type, source_id
|
|
HAVING COUNT(*) > 1
|
|
})
|
|
|
|
duplicates.each do |row|
|
|
uid = row['user_id']
|
|
stype = connection.quote(row['source_type'])
|
|
sid = row['source_id']
|
|
|
|
execute(%Q{
|
|
DELETE FROM notification_settings
|
|
WHERE user_id = #{uid}
|
|
AND source_type = #{stype}
|
|
AND source_id = #{sid}
|
|
AND id != (
|
|
SELECT id FROM (
|
|
SELECT min(id) AS id
|
|
FROM notification_settings
|
|
WHERE user_id = #{uid}
|
|
AND source_type = #{stype}
|
|
AND source_id = #{sid}
|
|
) min_ids
|
|
)
|
|
})
|
|
end
|
|
end
|
|
end
|