Ratanachai Ken Sombat

…hare the same table, you cannot have the same attribute on two subclasses with different datatypes. As the STI table gets bigger and bigger, it might have too many null fields. Fields that exist only on a subclass would be null for other subclasses. There are other pros and cons of STIs but that could be a discussion for another time.

In an STI setup, you have a model that is parent(or super) to other models. This parent model must contain a field named type with no default value needed. The type field automatically stores the name of the child model(subcla…

It’s pertinent to note that in this setup, citizen has no underlying table but electorate and candidate do have underlying tables.