Marc Mintel
5397309103
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58 lines
1.4 KiB
Plaintext
58 lines
1.4 KiB
Plaintext
'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.UniqueTypeNamesRule = UniqueTypeNamesRule;
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var _GraphQLError = require('../../error/GraphQLError.js');
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/**
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* Unique type names
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*
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* A GraphQL document is only valid if all defined types have unique names.
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*/
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function UniqueTypeNamesRule(context) {
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const knownTypeNames = Object.create(null);
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const schema = context.getSchema();
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return {
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ScalarTypeDefinition: checkTypeName,
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ObjectTypeDefinition: checkTypeName,
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InterfaceTypeDefinition: checkTypeName,
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UnionTypeDefinition: checkTypeName,
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EnumTypeDefinition: checkTypeName,
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InputObjectTypeDefinition: checkTypeName,
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};
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function checkTypeName(node) {
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const typeName = node.name.value;
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if (schema !== null && schema !== void 0 && schema.getType(typeName)) {
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context.reportError(
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new _GraphQLError.GraphQLError(
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`Type "${typeName}" already exists in the schema. It cannot also be defined in this type definition.`,
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{
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nodes: node.name,
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},
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),
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);
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return;
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}
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if (knownTypeNames[typeName]) {
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context.reportError(
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new _GraphQLError.GraphQLError(
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`There can be only one type named "${typeName}".`,
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{
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nodes: [knownTypeNames[typeName], node.name],
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},
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),
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);
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} else {
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knownTypeNames[typeName] = node.name;
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}
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return false;
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}
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}
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