strawberry-graphql / federation-demo

Apollo Federation x Strawberry GraphQL

Strawberry Apollo Federation demo

This repo contains a demo of Strawberry's Apollo Federation support.

It contains 3 services:

1. A books service
2. A reviews service
3. A gateway service

Books

The books service provides a GraphQL API that returns a list of books.

Reviews

The reviews service provides a GraphQL API that only extends the Book type (coming from the books service) with a reviews field.

The reviews field is a list of reviews for the book.

Gateway

The gateway service provides a GraphQL API that combines the books and reviews. It is implemented with Apollo Server and Apollo Gateway.

Schema

Running the demo

For convenience we provided a docker-compose file that can be used to run the whole demo.

Before being able to run the demo you need the following environment variables, in both .env and gateway/.env:

APOLLO_KEY=...
APOLLO_GRAPH_REF=...

You can get these values by creating a new service in Apollo Studio. You can follow the instructions here: https://www.apollographql.com/docs/studio/getting-started/

Once you have the environment variables set, you can upload the schema to Apollo Studio by running:

make publish

Assuming you have docker and docker compose installed you can run the following command to start the demo:

docker-compose up

This should start all the services and you should be able to access the GraphQL API at http://localhost:4000/graphql.

federation-demo's Issues

Errors in starting docker-compose

I'm getting the following errors when i start with docker-compose up
...
books_1 | field = StrawberryField(
books_1 | File "/usr/local/lib/python3.10/site-packages/strawberry/field.py", line 56, in init
books_1 | super().init( # type: ignore
books_1 | TypeError: Field.init() missing 1 required positional argument: 'kw_only'
....
reviews_1 | field = StrawberryField(
reviews_1 | File "/usr/local/lib/python3.10/site-packages/strawberry/field.py", line 56, in init
reviews_1 | super().init( # type: ignore
reviews_1 | TypeError: Field.init() missing 1 required positional argument: 'kw_only'
...
gateway_1 | Polling running services is dangerous and not recommended in production. Polling should only be used against a registry. If you are polling running services, use with caution.
gateway_1 | ❌ Unable to start gateway Error: Couldn't load service definitions for "books" at http://books:8000/graphql: request to http://books:8000/graphql failed, reason: connect ECONNREFUSED 172.26.0.2:8000
gateway_1 | at /app/node_modules/@apollo/gateway/src/loadServicesFromRemoteEndpoint.ts:73:15
gateway_1 | at processTicksAndRejections (node:internal/process/task_queues:96:5)
gateway_1 | at async Promise.all (index 0)
gateway_1 | at async Object.getServiceDefinitionsFromRemoteEndpoint (/app/node_modules/@apollo/gateway/src/loadServicesFromRemoteEndpoint.ts:77:30)
gateway_1 | at async ApolloGateway.updateSchema (/app/node_modules/@apollo/gateway/src/index.ts:423:20)
gateway_1 | at async ApolloGateway.loadDynamic (/app/node_modules/@apollo/gateway/src/index.ts:403:7)
gateway_1 | at async ApolloGateway.load (/app/node_modules/@apollo/gateway/src/index.ts:361:9)
gateway_1 | [nodemon] clean exit - waiting for changes before restart