Using GraphQL Voyager without the endpoint

[Isha Talegaonkar]

My project does not have a graphql endpoint as such, but a bunch of input graphql schema files that I am getting using an API. I need to visualize the file that I am getting as input. Is there any way to do so?

[Stefano]

@isha-talegaonkar you can build an introspection from file and use it. If you check the demo, you can get some clues on how to make it.

[Isha Talegaonkar]

Hi, I am still unsure on how I can go about this. Can you please point me towards some files I can look at to understand better? Thanks, Isha

…

On Wed, Jul 13, 2022 at 1:08 PM Stefano ***@***.***> wrote: @isha-talegaonkar <https://github.com/isha-talegaonkar> you can build an introspection from file and use it. If you check the demo, you can get some clues on how to make it. — Reply to this email directly, view it on GitHub <#238 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AH3FGXFODVXGXTGM4DESOETVT4O4NANCNFSM53PQNQ5A> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[Johannes Bäurle]

Is this possible with the standalone version? It's probably easiest to use sdlToIntrospection and then give the result as introspection object to the init function....
But I guess sdlToIntrospection isn't exposed?!

[Stefano]

@isha-talegaonkar you might need to provide more info regarding your project.

You can always build and dump a complete SDL or get an introspection.
Almost any library can do it.

[Nicolas Despres]

Here is an example on how you can do this without an endpoint:

import {
    Source,
    parse,
    execute,
    buildSchema,
} from 'graphql'
import type {
    DocumentNode,
} from 'graphql'
import { Voyager, voyagerIntrospectionQuery } from 'graphql-voyager';


var schema = buildSchema(`
  type Account {
    Id: String
    Name: String
  }

  type Objects {
    Account: Account
  }

  type UIAPI {
    query: Objects
  }

  type Query {
    Account(Id: String): Account
    uiapi: UIAPI
  }
`)

async function retrieveDemoIntrospection(introspectionQuery){
    let documentAST: DocumentNode | undefined;
    try {
        //const params = await getGraphQLParams(request)
        documentAST = parse(new Source(introspectionQuery, 'GraphQL request'));
    } catch (syntaxError: unknown) {
        // Return 400: Bad Request if any syntax errors exist.
        //documentAST = new DocumentNode()
        throw new Error("failed")
    }

    return execute({
        schema,
        document: documentAST,
        rootValue: {},
        contextValue: {},
        variableValues: {},
        operationName: "IntrospectionQuery",
        fieldResolver: undefined,
        typeResolver: undefined,
    });
}

You can extend field and type resolver which can be very helpful when you schema is dynamic.