@graphql-codegen/client-preset
Version:
GraphQL Code Generator preset for client.
42 lines (41 loc) • 2.02 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.addTypenameSelectionDocumentTransform = void 0;
const graphql_1 = require("graphql");
/**
* Automatically adds `__typename` selections to every object type in your GraphQL document except the root node in subscriptions since a single root field is expected (https://spec.graphql.org/draft/#sec-Single-root-field).
* This is useful for GraphQL Clients such as Apollo Client or urql that need typename information for their cache to function.
*/
exports.addTypenameSelectionDocumentTransform = {
transform({ documents }) {
return documents.map(document => ({
...document,
document: document.document
? (0, graphql_1.visit)(document.document, {
SelectionSet(node, _, parent) {
const isSubscriptionRoot = typeof parent?.kind === 'string' &&
parent.kind === 'OperationDefinition' &&
parent.operation === 'subscription';
if (!isSubscriptionRoot &&
!node.selections.find(selection => selection.kind === 'Field' && selection.name.value === '__typename')) {
return {
...node,
selections: [
{
kind: graphql_1.Kind.FIELD,
name: {
kind: graphql_1.Kind.NAME,
value: '__typename',
},
},
...node.selections,
],
};
}
return undefined;
},
})
: undefined,
}));
},
};