Since the announcement of GraphQL I've been waiting for some 'real world' apis. (Sure the Star Wars GraphQL apis are fun)

Does anyone know any best practices if you want to adopt this is in an existing application using a relation database (i.e. PostgreSQL). I don't know how to implement this without causing N+1 queries. (or Worse).

For example:

{ Post {

    title,
    content,
    Author {
      name,
      avatar,
    },

    Comments(first:10) {

.. } } }

A naive implementation would cause a lot of query, for each "edge" a query.

You can use something like dataloader[0] or haxl[1] to help with this issue.

[0]: https://github.com/facebook/dataloader

[1]: https://github.com/facebook/Haxl