How to implement graphQL sub-query

Question

I'm having a block trying to figure out the syntax for a query condition that seems like it would be a pretty common one.

The typedef below stores an ID value for the agent who represents an Author, in a one-agent-to-many (authors) relationship. I'd like to extract the name of the agent at the same time I'm getting details from the Author schema.

type Author {
    id: ID!
    firstName: String
    middleInitial: String
    lastName: String
    posts: [Post]
    agent: ID

}

So the enclosing query (returning a list of all Authors) looks like this:

{
  authors {
    firstName
    lastName
    agent
    }
}

This gives me back the Agent's ID. How can I use that same query to fetch the agent's name, from a typedef similar to the one above?

Solution

type Agent {
    id: ID!
    name: String
}

type Author {
    id: ID!
    firstName: String
    middleInitial: String
    lastName: String
    posts: [Post]
    agent: Agent
}

// Query
 {
   authors {
     firstName
     lastName
     agent {
         name
      }
    } 
  }

Comments

[capouch]

I mistakenly said one-to-one; each author has an agent, but each agent has many authors.