Generate type for variables

[janicduplessis]

I'm trying to improve the apollo graphql client to use a functor module to create a query fetching component and the last piece missing is the type of the variables of the query, similar to the one added for the return type.

The api I'm going for would look like:

module AppQuery = [%graphql {| ... |}];

module QueryRenderer = Client.Query.Create(AppQuery);

<QueryRenderer variables={"a": a}>...</Query>

This would allow to type the variables prop easily.

[anmonteiro]

Just ran into this too.

solved it by nesting my mutation in the module I pass as argument to the functor like below:

module type MutationType = {
  type t;
  type variables;

  module Mutation: {
    let makeWithVariables:
      variables =>
      {
        .
        "parse": Js.Json.t => t,
        "query": string,
        "variables": Js.Json.t,
      };
  };
};