42 lines
1.0 KiB
JavaScript
42 lines
1.0 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.UniqueFragmentNamesRule = UniqueFragmentNamesRule;
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var _GraphQLError = require('../../error/GraphQLError.js');
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/**
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* Unique fragment names
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*
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* A GraphQL document is only valid if all defined fragments have unique names.
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*
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* See https://spec.graphql.org/draft/#sec-Fragment-Name-Uniqueness
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*/
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function UniqueFragmentNamesRule(context) {
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const knownFragmentNames = Object.create(null);
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return {
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OperationDefinition: () => false,
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FragmentDefinition(node) {
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const fragmentName = node.name.value;
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if (knownFragmentNames[fragmentName]) {
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context.reportError(
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new _GraphQLError.GraphQLError(
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`There can be only one fragment named "${fragmentName}".`,
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{
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nodes: [knownFragmentNames[fragmentName], node.name],
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},
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),
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);
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} else {
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knownFragmentNames[fragmentName] = node.name;
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}
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return false;
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},
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};
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}
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