tartiflette-plugin-scalars example

app.py

import asyncio

from ipaddress import ip_address
from tartiflette import Resolver, create_engine

from aiohttp import web
from tartiflette_aiohttp import register_graphql_handlers

@Resolver("Query.ipAddress")
async def resolve_ip_address(parent, args, ctx, info):
    return ip_address("127.0.0.1")

@Resolver("Query.port")
async def resolve_port(parent, args, ctx, info):
    return 8080

@Resolver("Mutation.checkGUID")
async def resolve_guid(parent, args, ctx, info):
    return args["input"]

async def engine():
    with open("schema.sdl") as schema:
        return await create_engine(
            schema.read(),
            modules=[
                {
                    "name": "tartiflette_plugin_scalars",
                    "config": {},
                }
            ],
        )


web.run_app(
    register_graphql_handlers(
        web.Application(),
        engine=engine(),
    )
)

schema.sdl

type Query {
  ipAddress: IPv4
  port: Port
}

type Mutation {
  checkGUID(input: GUID!): GUID!
}