Load data as Subclasses for STI Models

With models that use STI (Single Table Inheritance), Fixtures currently load based on the base class and not subclasses. The problem with this is that enums that belong to a sub class are not resolved appropriately and thus those columns are given a nil value.

Fix proposal: Load data as Subclasses for STI Models by ahowardm · Pull Request #43136 · rails/rails · GitHub

Thanks!