So if I have this Photos: [Media!]! in my schema, does it delete the Media when I delete the main schema? Photos is part of House. If I delete house, will photos delete too?

hey @Jscott388 take a look over here, there's a cascade deletion attribute on the @relation directive https://www.prisma.io/docs/1.0/reference/service-configuration/data-modelling-(sdl)-eiroozae8u/#the-@relation-directive

Do you have to give it a name or is that optional?

if the relationship is ambiguous in relation to other fields (eg. referencing User type on more than one field in each type) then you must have a @relation directive, alghough i'm not quite sure if you must assign a name if using the onDelete argument