Generate executable query that works with Mercurius gateway .

V3 versions brings breaking changes, support for Federation SDL but drops support for #import from other files, only single file schema supported, for V2 version refer here

It supports:

• Loading schema from string
• Loading schema from file
• Federation SDL schemas
• Loaders for n + 1 queries

It doesn't support:

• Loading schema file with imports (IE #import User from types/user.gql) support

---

Usage:

// Import / Require
// const { makeGatewayExecutableSchema } = require("@xxskyy/mercurius-exec-service-schema")
import { makeGatewayExecutableSchema } from "@xxskyy/mercurius-exec-service-schema"

const resolvers = {
 Query: {
   versions: () => [
     {id: 1, iteration: "0.0.1"},
     {id: 2, iteration: "0.0.2"},
     {id: 3, iteration: "0.0.3"},
     {id: 4, iteration: "0.0.4"},
   ]
 }
}

const schema = `
extend type Query {
  versions: [Version]
}

type Version @key(fields: "id") {
  id: ID!
  iteration: String
}
`

// Function needs 2 of 3 inputs
// resolvers - reuqired - gql resovler
// and
// schemaPath - path to .gql schema file
// or
// schemaString - string with gql schema

const executableSchema = await makeGatewayExecutableSchema({
  schemaString: schema
  // or
  // schemaPath: "./schema.gql",
  resolvers,
})

// Returned schema are executable schema ready to apply middlewares

If you use wildcard in Query shield remember to add _service: allow, and _entities: allow, to Query rules.

Example:

const permissions = shield({
  Query: {
    "*": and(isAuthenticated, rateLimitRule({ window: "20s", max: 100 })),
    _service: allow,
    _entities: allow,
  },
})