bs-graphql-scalar

bs-graphql-scalar

BuckleScript utilities for creating new GraphQL scalar types.

Getting Started

To create a new scalar using the graphql JavaScript libary, you need three functions:

• serialize - Used when serializing results to send back to the client.
• parseValue - Used to parse input that was provided as variables by the client.
• parseLiteral - Used to parse input that was provided inline in the query.

Example

let serializeDateTime = (value) =>
  value |> Js.Date.getTime |> Js.Float.toString |> Js.Nullable.return;

let parseDateTimeValue = (str) =>
  str |> Js.Date.fromString |> Js.Nullable.return;

let parseDateTimeLiteral = (ast) => {
  open Language;
  let kind = getAstKind(ast);
  if (kind === intKind) {
    ast |> getAstValue |> TextUtils.parseInt_(10) |> Js.Nullable.return
  } else {
    Js.Nullable.null
  }
};

let resolvers = {
  "DateTime":
    makeScalar({
      "name": "DateTime",
      "description": "DateTime custom scalar Type",
      "serialize": serializeDateTime,
      "parseValue": parseDateTimeValue,
      "parseLiteral": parseDateTimeLiteral
    }),
};

License

BSD 2-Clause