type Todo3 @model {
  id: ID!
  Something: [Something] @connection(keyName: "byTodo3", fields: ["id"])
}

type Something @model @key(name: "byTodo3", fields: ["todo3ID"]) @key(name: "byTodo", fields: ["todoID"]) {
  id: ID!
  todo3ID: ID!
  todoID: ID!
}

type Todo @model {
  id: ID!
  name: String!
  description: String
  addfield2: String
  Something: [Something] @connection(keyName: "byTodo", fields: ["id"])
}