help with prisma planetscale schema

datasource db {
  provider = "mysql"
  url      = env("DATABASE_URL")
  relationMode = "prisma"
}

generator client {
  provider = "prisma-client-js"
}

model Post {
  id       String   @id @default(cuid())
  title    DateTime @default(now())
  content  String? @db.VarChar(255)
  authorId String
  likes    Like[]
  @@index([authorId])
}

model Like {
  id      String  @id @default(cuid())
  userId  String 
  postId  String  
  post    Post    @relation(fields: [postId], references: [id])
  @@unique([userId, postId])

}

datasource db {
  provider = "mysql"
  url      = env("DATABASE_URL")
  relationMode = "prisma"
}

generator client {
  provider = "prisma-client-js"
}

model Post {
  id       String    @id @default(cuid())
  title    DateTime  @default(now())
  content  String?   @db.VarChar(255)
  authorId String
  author   Like      @relation(fields: [authorId], references: [id])
  likes    Like[]
  comments Comment[]
  @@index([authorId])
}

model Like {
  id      String  @id @default(cuid())
  userId  String 
  postId  String  
  post    Post    @relation(fields: [postId], references: [id])
  @@unique([userId, postId])
}

model Comment {
  id        String    @id @default(cuid())
  content   String
  authorId  String
  postId    String
  parentId  String?
  createdAt DateTime  @default(now())
  author    Post      @relation(fields: [authorId], references: [id])
  post      Post      @relation(fields: [postId], references: [id])
  parent    Comment?  @relation("CommentToComment", fields: [parentId])
  children  Comment[] @relation("CommentToComment")
  
  @@relation("CommentToComment", onDelete: NoAction, onUpdate: NoAction)
}