(Relay) Output ID instead of GlobalID in GraphQL schema

[aryaniyaps]

Request to output the ID scalar instead of GlobalID, while generating the GraphQL schema

My understanding is that GlobalID was meant to be an internal helper that resolves nodes, but ended up being a custom scalar.

Feature Request Type

• Core functionality
• Alteration (enhancement/optimization) of existing feature(s)
• New behavior

Description

Currently, while using the relay integration, and working with node types, like the example code below:

import strawberry
from strawberry import relay


@strawberry.type
class Fruit(relay.Node):
    code: relay.NodeID[int]
    name: str
    weight: float

    @classmethod
    def resolve_nodes(
        cls,
        *,
        info: strawberry.Info,
        node_ids: Iterable[str],
        required: bool = False,
    ):
        return [
            all_fruits[int(nid)] if required else all_fruits.get(nid)
            for nid in node_ids
        ]

We get a schema output like this:

scalar GlobalID

interface Node {
  id: GlobalID!
}

type Fruit implements Node {
  id: GlobalID!
  name: String!
  weight: Float!
}

But in the relay specification, which the GlobalID scalar is based on:
https://relay.dev/graphql/objectidentification.htm

calls this scalar by the name ID, and not GlobalID.

I think that there is no mention of a custom scalar to be returned for object identification.

This leads to a lot of issues while working with client libraries such as relay, where directives expect the return type to be the scalar type of ID, and not GlobalID.

An example relay compiler error is shown below:

> [email protected] relay
> relay-compiler

[INFO] [default] compiling...
[ERROR] Error: ✖︎ Invalid use of @deleteEdge on field 'deletedTodoId'. Expected field type 'ID', got 'GlobalID'.

  client/src/components/home-page/Todo.tsx:20:21
   19 │     deleteTodo(todoId: $todoId) {
   20 │       deletedTodoId @deleteEdge(connections: $connections)
      │                     ^^^^^^^^^^^
   21 │     }

[ERROR] Compilation failed.
[ERROR] Unable to run relay compiler. Error details: 
Failed to build:
 - Validation errors: 1 error(s) encountered above.

Output GraphQL schema (After requested change)

interface Node {
 id: ID!
}

type Fruit implements Node {
 id: ID!
 name: String!
 weight: Float!
}

It would be nice if we could change the GlobalID scalar being generated to ID

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[aryaniyaps]

Here is a temporary solution for anyone who has the same issue, until this has been resolved:

import strawberry
from strawberry.relay import GlobalID

# temporary hack until strawberry fixes relay ID scalar generation
ID = strawberry.scalar(
    strawberry.ID,
    serialize=lambda value: str(value),
    parse_value=lambda value: GlobalID.from_id(value=value),
)

schema = Schema(
    query=query,
    mutation=mutation,
    scalar_overrides={GlobalID: ID},
)