inheritance_column 中的_type_disabled 是什么意思？

Question

I just came across with such a line in some model in Rails:

self.inheritance_column = :_type_disabled

What does it do?

Answer 1

And I realised what's the answer during writing the question. It disables single table inheritance , what practically means that Rails won't assume that I have a special type field in my model and my eventual inheritation will have consequences only on code level, not in the database.