discourse/db/migrate/20150213174159_create_diges...

47 lines
1.3 KiB
Ruby

class CreateDigestUnsubscribeKeys < ActiveRecord::Migration
def up
create_table :digest_unsubscribe_keys, id: false do |t|
t.string :key, limit: 64, null: false
t.integer :user_id, null: false
t.timestamps
end
execute "ALTER TABLE digest_unsubscribe_keys ADD PRIMARY KEY (key)"
add_index :digest_unsubscribe_keys, :created_at
migrate_redis_keys
end
# It is slightly odd to migrate from redis to postgres; I imagine a lot
# could fail, so if anything does we just rescue
def migrate_redis_keys
return if Rails.env.test?
temp_keys = $redis.keys('temporary_key:*')
if temp_keys.present?
temp_keys.map! do |key|
user_id = $redis.get(key).to_i
ttl = $redis.ttl(key).to_i
if ttl > 0
ttl = "'#{ttl.seconds.ago.strftime('%Y-%m-%d %H:%M:%S')}'"
else
ttl = "CURRENT_TIMESTAMP"
end
$redis.del(key)
key.gsub!('temporary_key:', '')
user_id ? "('#{key}', #{user_id}, #{ttl}, #{ttl})" : nil
end
temp_keys.compact!
if temp_keys.present?
execute "INSERT INTO digest_unsubscribe_keys (key, user_id, created_at, updated_at) VALUES #{temp_keys.join(', ')}"
end
end
rescue
# If anything goes wrong, continue with other migrations
end
def down
drop_table :digest_unsubscribe_keys
end
end