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- "use strict";
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports.UniqueFieldDefinitionNamesRule = UniqueFieldDefinitionNamesRule;
- var _GraphQLError = require("../../error/GraphQLError.js");
- var _definition = require("../../type/definition.js");
- /**
- * Unique field definition names
- *
- * A GraphQL complex type is only valid if all its fields are uniquely named.
- */
- function UniqueFieldDefinitionNamesRule(context) {
- var schema = context.getSchema();
- var existingTypeMap = schema ? schema.getTypeMap() : Object.create(null);
- var knownFieldNames = Object.create(null);
- return {
- InputObjectTypeDefinition: checkFieldUniqueness,
- InputObjectTypeExtension: checkFieldUniqueness,
- InterfaceTypeDefinition: checkFieldUniqueness,
- InterfaceTypeExtension: checkFieldUniqueness,
- ObjectTypeDefinition: checkFieldUniqueness,
- ObjectTypeExtension: checkFieldUniqueness
- };
- function checkFieldUniqueness(node) {
- var _node$fields;
- var typeName = node.name.value;
- if (!knownFieldNames[typeName]) {
- knownFieldNames[typeName] = Object.create(null);
- } // istanbul ignore next (See: 'https://github.com/graphql/graphql-js/issues/2203')
- var fieldNodes = (_node$fields = node.fields) !== null && _node$fields !== void 0 ? _node$fields : [];
- var fieldNames = knownFieldNames[typeName];
- for (var _i2 = 0; _i2 < fieldNodes.length; _i2++) {
- var fieldDef = fieldNodes[_i2];
- var fieldName = fieldDef.name.value;
- if (hasField(existingTypeMap[typeName], fieldName)) {
- context.reportError(new _GraphQLError.GraphQLError("Field \"".concat(typeName, ".").concat(fieldName, "\" already exists in the schema. It cannot also be defined in this type extension."), fieldDef.name));
- } else if (fieldNames[fieldName]) {
- context.reportError(new _GraphQLError.GraphQLError("Field \"".concat(typeName, ".").concat(fieldName, "\" can only be defined once."), [fieldNames[fieldName], fieldDef.name]));
- } else {
- fieldNames[fieldName] = fieldDef.name;
- }
- }
- return false;
- }
- }
- function hasField(type, fieldName) {
- if ((0, _definition.isObjectType)(type) || (0, _definition.isInterfaceType)(type) || (0, _definition.isInputObjectType)(type)) {
- return type.getFields()[fieldName] != null;
- }
- return false;
- }
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