55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true,
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});
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exports.UniqueInputFieldNamesRule = UniqueInputFieldNamesRule;
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var _invariant = require('../../jsutils/invariant.js');
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var _GraphQLError = require('../../error/GraphQLError.js');
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/**
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* Unique input field names
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*
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* A GraphQL input object value is only valid if all supplied fields are
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* uniquely named.
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*
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* See https://spec.graphql.org/draft/#sec-Input-Object-Field-Uniqueness
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*/
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function UniqueInputFieldNamesRule(context) {
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const knownNameStack = [];
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let knownNames = Object.create(null);
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return {
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ObjectValue: {
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enter() {
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knownNameStack.push(knownNames);
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knownNames = Object.create(null);
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},
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leave() {
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const prevKnownNames = knownNameStack.pop();
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prevKnownNames || (0, _invariant.invariant)(false);
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knownNames = prevKnownNames;
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},
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},
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ObjectField(node) {
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const fieldName = node.name.value;
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if (knownNames[fieldName]) {
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context.reportError(
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new _GraphQLError.GraphQLError(
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`There can be only one input field named "${fieldName}".`,
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{
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nodes: [knownNames[fieldName], node.name],
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},
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),
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);
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} else {
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knownNames[fieldName] = node.name;
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}
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},
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};
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}
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