Tag linked FeaturedCollection objects over ActivityPub (#38115)

db/migrate/20260319142348_create_tagged_objects.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class CreateTaggedObjects < ActiveRecord::Migration[8.1]
+  def change
+    create_table :tagged_objects do |t|
+      t.references :status, null: false, foreign_key: { on_delete: :cascade }, index: false
+      t.references :object, polymorphic: true, null: true
+      t.string :ap_type, null: false
+      t.string :uri
+
+      t.timestamps
+    end
+
+    add_index :tagged_objects, [:status_id, :object_type, :object_id], unique: true, where: 'object_type IS NOT NULL AND object_id IS NOT NULL'
+    add_index :tagged_objects, [:status_id, :uri], unique: true, where: 'uri IS NOT NULL'
+  end
+end