Add conversation-based forwarding for limited visibility statuses through bearcaps

db/migrate/20200827205543_conversation_ids_to_timestamp_ids.rb

@@ -0,0 +1,15 @@
+class ConversationIdsToTimestampIds < ActiveRecord::Migration[5.2]
+  def up
+    safety_assured do
+      execute("ALTER TABLE conversations ALTER COLUMN id SET DEFAULT timestamp_id('conversations')")
+    end
+
+    Mastodon::Snowflake.ensure_id_sequences_exist
+  end
+
+  def down
+    execute("LOCK conversations")
+    execute("SELECT setval('conversations_id_seq', (SELECT MAX(id) FROM conversations))")
+    execute("ALTER TABLE conversations ALTER COLUMN id SET DEFAULT nextval('conversations_id_seq')")
+  end
+end