@theguild/federation-composition
Version:
Open Source Composition library for Apollo Federation
67 lines (66 loc) • 3.55 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.InterfaceFieldNoImplementationRule = InterfaceFieldNoImplementationRule;
const graphql_1 = require("graphql");
function InterfaceFieldNoImplementationRule(context, supergraph) {
return {
ObjectType(objectTypeState) {
if (objectTypeState.interfaces.size === 0) {
return;
}
for (const interfaceName of objectTypeState.interfaces) {
const interfaceTypeState = getTypeFromSupergraph(supergraph, interfaceName);
if (!interfaceTypeState) {
throw new Error(`Expected an interface to exist in supergraph state`);
}
if (interfaceTypeState.kind !== 'interface') {
return;
}
const nonRequiredFields = [];
for (const [graph, interfaceStateInGraph] of interfaceTypeState.byGraph) {
if (!interfaceStateInGraph.isInterfaceObject) {
continue;
}
for (const [fieldName, interfaceFieldState] of interfaceTypeState.fields) {
const interfaceFieldStateInGraph = interfaceFieldState.byGraph.get(graph);
if (!interfaceFieldStateInGraph) {
continue;
}
if (interfaceFieldStateInGraph.external) {
continue;
}
nonRequiredFields.push(fieldName);
}
}
for (const [fieldName, interfaceFieldState] of interfaceTypeState.fields) {
if (nonRequiredFields.includes(fieldName)) {
continue;
}
if (objectTypeState.fields.has(fieldName) && objectTypeState.isEntity) {
continue;
}
for (const [graph, objectTypeInGraph] of objectTypeState.byGraph) {
if (!objectTypeInGraph.interfaces.has(interfaceName)) {
continue;
}
const objectFieldState = objectTypeState.fields.get(fieldName);
if (!objectFieldState) {
const interfaceFieldDefinedInGraphs = Array.from(interfaceFieldState.byGraph.keys()).map(context.graphIdToName);
const declaredIn = interfaceFieldDefinedInGraphs.length === 1
? `subgraph "${interfaceFieldDefinedInGraphs[0]}"`
: `subgraphs ${interfaceFieldDefinedInGraphs.map(g => `"${g}"`).join(', ')}`;
context.reportError(new graphql_1.GraphQLError(`Interface field "${interfaceName}.${fieldName}" is declared in ${declaredIn} but type "${objectTypeState.name}", which implements "${interfaceName}" in subgraph "${context.graphIdToName(graph)}" does not have field "${fieldName}".`, {
extensions: {
code: 'INTERFACE_FIELD_NO_IMPLEM',
},
}));
}
}
}
}
},
};
}
function getTypeFromSupergraph(state, name) {
return (state.objectTypes.get(name) ?? state.interfaceTypes.get(name) ?? state.unionTypes.get(name));
}