+import * as Sequelize from 'sequelize'
+
+async function up (utils: {
+ transaction: Sequelize.Transaction
+ queryInterface: Sequelize.QueryInterface
+ sequelize: Sequelize.Sequelize
+}): Promise<void> {
+ const query = `
+ WITH t AS (
+ SELECT actor.id FROM actor
+ LEFT JOIN "videoChannel" ON "videoChannel"."actorId" = actor.id
+ LEFT JOIN account ON account."actorId" = "actor"."id"
+ WHERE "videoChannel".id IS NULL and "account".id IS NULL
+ ) DELETE FROM "actorFollow" WHERE "actorId" IN (SELECT t.id FROM t) OR "targetActorId" in (SELECT t.id FROM t)
+ `
+
+ await utils.sequelize.query(query)
+}
+
+function down (options) {
+ throw new Error('Not implemented.')
+}
+
+export {
+ up,
+ down
+}