Referencial Actions in Prisma

To create Referencial actions in Prisma, you have to define what should happen on delete

model Post {  
  id       Int    @id @default(autoincrement())  
  title    String  
  author   User   @relation(fields: [authorId], references: [id], onDelete: Cascade)  
  authorId Int @unique  
}  
  
model User {  
  id    Int    @id @default(autoincrement())  
  posts Post[]  
}