fix: Soft delete existing associations of soft deleted users

packages/backend/src/db/migrations/20230824105813_soft_delete_soft_deleted_user_associations.ts

@@ -0,0 +1,35 @@
+import { Knex } from 'knex';
+
+export async function up(knex: Knex): Promise<void> {
+  const users = await knex('users').whereNotNull('deleted_at');
+  const userIds = users.map((user) => user.id);
+
+  const flows = await knex('flows').whereIn('user_id', userIds);
+  const flowIds = flows.map((flow) => flow.id);
+  const executions = await knex('executions').whereIn('flow_id', flowIds);
+  const executionIds = executions.map((execution) => execution.id);
+
+  await knex('execution_steps').whereIn('execution_id', executionIds).update({
+    deleted_at: knex.fn.now(),
+  });
+
+  await knex('executions').whereIn('id', executionIds).update({
+    deleted_at: knex.fn.now(),
+  });
+
+  await knex('steps').whereIn('flow_id', flowIds).update({
+    deleted_at: knex.fn.now(),
+  });
+
+  await knex('flows').whereIn('id', flowIds).update({
+    deleted_at: knex.fn.now(),
+  });
+
+  await knex('connections').whereIn('user_id', userIds).update({
+    deleted_at: knex.fn.now(),
+  });
+}
+
+export async function down(): Promise<void> {
+  // void
+}