tests for source links

config/initializers/migration_utilities.rb

@@ -0,0 +1,20 @@
+# typed: strict
+class ActiveRecord::Migration
+  extend T::Sig
+
+  sig do
+    params(
+      table_name: T.any(String, Symbol),
+      column_name: T.any(String, Symbol),
+      options: T::Hash[Symbol, T.untyped],
+    ).void
+  end
+  def add_json_index(table_name, column_name, options = {})
+    add_index(
+      table_name,
+      "(json_attributes->>'#{column_name}')",
+      name: "idx_#{table_name}_on_#{column_name}",
+      **options,
+    )
+  end
+end