type Student {
  _id: ID!
  name: String!
  email: String!
  course: String!
}

type Query {
  getStudent(_id: ID!): Student!
}

type Mutation {
  createStudent(name: String!, ...): Student!
  updateStudent(_id: ID!, name: String!, ...): Student!
  deleteStudent(_id: ID!): Student!
}

const StudentSchema: Schema = new Schema({
  _id: String,
  name: String,
  email: String,
  course: String,
});

const Student = model<Student>('Student', StudentSchema);

async function createStudent(_: any, args: any, ctx: any, __: any): Promise<Student> {
  // ...

  validate(args);

  const student = {
    _id: uuidv4(),
    ...args,
  }

  const e = new CreatedStudentEvent(student);
  stan.publish(e.topic, e.serialized());

  return student;
}

export default createStudent;