@graphql-yoga/plugin-defer-stream
Version:
Defer/Stream plugin for GraphQL Yoga.
27 lines (26 loc) • 1.15 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.StreamDirectiveOnListFieldRule = void 0;
const graphql_1 = require("graphql");
const utils_1 = require("@graphql-tools/utils");
/**
* Stream directive on list field
*
* A GraphQL document is only valid if stream directives are used on list fields.
*/
function StreamDirectiveOnListFieldRule(context) {
return {
Directive(node) {
const fieldDef = context.getFieldDef();
const parentType = context.getParentType();
if (fieldDef &&
parentType &&
node.name.value === utils_1.GraphQLStreamDirective.name &&
!((0, graphql_1.isListType)(fieldDef.type) ||
((0, graphql_1.isWrappingType)(fieldDef.type) && (0, graphql_1.isListType)(fieldDef.type.ofType)))) {
context.reportError((0, utils_1.createGraphQLError)(`Stream directive cannot be used on non-list field "${fieldDef.name}" on type "${parentType.name}".`, { nodes: node }));
}
},
};
}
exports.StreamDirectiveOnListFieldRule = StreamDirectiveOnListFieldRule;