Lock activities/users table during flake migration.

diff --git a/priv/repo/migrations/20181218172826_users_and_activities_flake_id.exs b/priv/repo/migrations/20181218172826_users_and_activities_flake_id.exs
index 6e5dfaa7734b25a6db73dc64b1faeb5aa9f4d81a..39d45f7e8be30f09a4fe4b79c2c0db3632cd0f9d 100644 (file)
--- a/priv/repo/migrations/20181218172826_users_and_activities_flake_id.exs
+++ b/priv/repo/migrations/20181218172826_users_and_activities_flake_id.exs
@@ -15,6 +15,10 @@ defmodule Pleroma.Repo.Migrations.UsersAndActivitiesFlakeId do
     #execute "update activities set external_id = CAST( LPAD( TO_HEX(id), 32, '0' ) AS uuid);"
     #execute "update users set external_id = CAST( LPAD( TO_HEX(id), 32, '0' ) AS uuid);"
 
+    # Lock both tables to avoid a running server to meddling with our transaction
+    execute "LOCK TABLE activities;"
+    execute "LOCK TABLE users;"
+
     execute "ALTER TABLE activities DROP CONSTRAINT activities_pkey CASCADE;"
     execute "ALTER TABLE users DROP CONSTRAINT users_pkey CASCADE;"