AWS Amplify - AppSync Schema Suggestion for BlueHyz

schema.graphql

type User
  @model
  @auth(
    rules: [
      { allow: owner, ownerField: "id" }
      { allow: groups, groups: ["admin"] }
    ]
  ) {
  id: ID!
  name: String
  bookings: [Booking] @connection(keyName: "bookingsByUser", fields: ["id"])
}
type Booking
  @model
  @auth(
    rules: [
      { allow: owner, ownerField: "userID" }
      { allow: groups, groups: ["admin"] }
    ]
  )
  @key(name: "bookingsByUser", fields: ["userID", "createdAt"]) {
  id: ID!
  userID: ID
  user: User @connection(fields: ["userID"])
  reservations: [Reservation]
    @connection(keyName: "reservationsByBooking", fields: ["id"])
  createdAt: AWSDateTime
  updatedAt: AWSDateTime
}
type Reservation
  @model
  @auth(
    rules: [
      { allow: owner, ownerField: "userID" }
      { allow: groups, groups: ["admin"] }
    ]
  )
  @key(name: "reservationsByBooking", fields: ["bookingID"]) {
  id: ID!
  userID: ID!
  user: User @connection(fields: ["userID"])
  bookingID: ID!
  booking: Booking @connection(fields: ["bookingID"])
  capacityID: ID!
  capacity: Capacity @connection(fields: ["capacityID"])
  guests: [Guest]
}
type Guest {
  name: String
}

type Hotel
  @model
  @auth(
    rules: [
      { allow: groups, groups: ["admin"] }
      { allow: private, operations: [read] }
      { allow: public, operations: [read], provider: iam }
    ]
  ) {
  id: ID!
  name: String
  address: String
  capacities: [Capacity]
    @connection(keyName: "capacitiesByHotel", fields: ["id"])
  rooms: [Room] @connection(keyName: "roomsByHotel", fields: ["id"])
}
type Capacity
  @model
  @auth(
    rules: [
      { allow: groups, groups: ["admin"] }
      { allow: private, operations: [read] }
      { allow: public, operations: [read], provider: iam }
    ]
  )
  @key(name: "capacitiesByHotel", fields: ["hotelID", "date"])
  @key(name: "capacitiesByRoom", fields: ["roomID", "date"])
  @key(name: "capacitiesByBooking", fields: ["bookingID", "date"]) {
  id: ID!
  date: AWSDateTime
  hotelID: ID!
  hotel: Hotel @connection(fields: ["hotelID"])
  roomID: ID!
  room: Room @connection(fields: ["roomID"])
  reservationID: ID
  reservation: Reservation @connection(fields: ["reservationID"])
}
type Room
  @model
  @auth(
    rules: [
      { allow: groups, groups: ["admin"] }
      { allow: private, operations: [read] }
      { allow: public, operations: [read], provider: iam }
    ]
  )
  @key(name: "roomsByHotel", fields: ["hotelID", "type"]) {
  id: ID!
  description: String
  type: RoomTypeEnum
  maxGuests: Int
  hotelID: ID!
  hotel: Hotel @connection(fields: ["hotelID"])
  capacities: [Capacity]
    @connection(keyName: "capacitiesByRoom", fields: ["id"])
}
enum RoomTypeEnum {
  SINGLE
  COUPLE
  SOMETHINGELSE
}