50 lines
1.3 KiB
JavaScript
50 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.UniqueVariableNamesRule = UniqueVariableNamesRule;
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var _groupBy = require('../../jsutils/groupBy.js');
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var _GraphQLError = require('../../error/GraphQLError.js');
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/**
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* Unique variable names
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*
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* A GraphQL operation is only valid if all its variables are uniquely named.
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*/
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function UniqueVariableNamesRule(context) {
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return {
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OperationDefinition(operationNode) {
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var _operationNode$variab;
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// See: https://github.com/graphql/graphql-js/issues/2203
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/* c8 ignore next */
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const variableDefinitions =
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(_operationNode$variab = operationNode.variableDefinitions) !== null &&
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_operationNode$variab !== void 0
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? _operationNode$variab
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: [];
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const seenVariableDefinitions = (0, _groupBy.groupBy)(
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variableDefinitions,
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(node) => node.variable.name.value,
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);
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for (const [variableName, variableNodes] of seenVariableDefinitions) {
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if (variableNodes.length > 1) {
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context.reportError(
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new _GraphQLError.GraphQLError(
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`There can be only one variable named "$${variableName}".`,
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{
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nodes: variableNodes.map((node) => node.variable.name),
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},
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),
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);
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}
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}
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},
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};
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}
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