@theguild/federation-composition/esm/supergraph/validation/rules/override-label-with-requires.js

Open Source Composition library for Apollo Federation

import { GraphQLError } from "graphql";
export function OverrideLabelWithRequiresRule(context) {
    return {
        ObjectTypeField(objectTypeState, fieldState) {
            for (const [graphId, fieldStateInGraph] of fieldState.byGraph) {
                if (!fieldStateInGraph.override || !fieldStateInGraph.overrideLabel) {
                    continue;
                }
                const sourceGraphId = context.graphNameToId(fieldStateInGraph.override);
                if (!sourceGraphId) {
                    continue;
                }
                const sourceFieldStateInGraph = fieldState.byGraph.get(sourceGraphId);
                if (!sourceFieldStateInGraph?.requires) {
                    continue;
                }
                context.reportError(new GraphQLError(`@override with label (progressive override) cannot be used on field "${objectTypeState.name}.${fieldState.name}" on subgraph "${context.graphIdToName(graphId)}" since "${objectTypeState.name}.${fieldState.name}" on "${context.graphIdToName(sourceGraphId)}" is marked with directive "@requires". Use non-progressive @override (without label) for this migration.`, {
                    extensions: {
                        code: "OVERRIDE_COLLISION_WITH_ANOTHER_DIRECTIVE",
                    },
                }));
            }
        },
    };
}