sandorbedo

sandorbedo

How to return different field values with aliases?

Hi,

Let’s say I have a GraphQL schema like this:

type Ops {
  add(a: Int, b: Int): Int
}

type Query {
  calc: Ops
}

…and I want my Absinthe server to answer to queries like this:

query {
  calc {
    some: add(a: 1, b: 2)
    some_other: add(a: 41, b: 1)
  }
}

The expected answer is like this:

{
  "data": {
    "calc": {
      "some": 3,
      "some_other": 42
     }
    }
  }

Now my problem is that I can’t figure out what to return in the resolver of the calc query. The first guess was to just return {:ok, %{some: 3, some_other: 42}}, but that doesn’t work. I tried a map with some and some_other key as strings. Also tried to return nested maps, and binary keys like "some:add" and "some: add". None of them worked. The only way Absinthe gives me a non-null response is to use the :add key in the return map, but that way I cannot distinguish between the two separate add calculations. (That means some and some_other collapses into the same value.)

What is the proper way to answer a query like this? What should I return from my resolver to get back two separate values for my tow aliases?

First Post!

benwilson512

benwilson512

Author of Craft GraphQL APIs in Elixir with Absinthe

Resolvers don’t care about field aliases (your “some” or “some_other”). Just return a value consistent with your resolver type eg {:ok, 42}.

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