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|
from dataclasses import dataclass
from typing import Optional, TypeVar
from graphql import print_schema
from apischema.graphql import graphql_schema, relay, resolver
Cursor = int
Node = TypeVar("Node")
Edge = TypeVar("Edge", bound=relay.Edge)
@dataclass
class MyConnection(relay.Connection[Node, Cursor, Edge]):
connection_field: bool
@dataclass
class MyEdge(relay.Edge[Node, Cursor]):
edge_field: int | None
Connection = MyConnection[Node, MyEdge[Node]]
@dataclass
class Ship:
name: str
@dataclass
class Faction:
@resolver
def ships(
self, first: int | None, after: Cursor | None
) -> Connection[Optional[Ship]] | None:
...
def faction() -> Faction | None:
return Faction()
schema = graphql_schema(query=[faction])
schema_str = """\
type Query {
faction: Faction
}
type Faction {
ships(first: Int, after: Int): ShipConnection
}
type ShipConnection {
edges: [ShipEdge]
pageInfo: PageInfo!
connectionField: Boolean!
}
type ShipEdge {
node: Ship
cursor: Int!
edgeField: Int
}
type Ship {
name: String!
}
type PageInfo {
hasPreviousPage: Boolean!
hasNextPage: Boolean!
startCursor: Int
endCursor: Int
}"""
assert print_schema(schema) == schema_str
|
