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44 lines
1.2 KiB
44 lines
1.2 KiB
import { groupBy } from '../../jsutils/groupBy.mjs'; |
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import { GraphQLError } from '../../error/GraphQLError.mjs'; |
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/** |
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* Unique argument names |
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* |
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* A GraphQL field or directive is only valid if all supplied arguments are |
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* uniquely named. |
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* |
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* See https://spec.graphql.org/draft/#sec-Argument-Names |
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*/ |
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export function UniqueArgumentNamesRule(context) { |
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return { |
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Field: checkArgUniqueness, |
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Directive: checkArgUniqueness, |
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}; |
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function checkArgUniqueness(parentNode) { |
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var _parentNode$arguments; |
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// FIXME: https://github.com/graphql/graphql-js/issues/2203 |
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/* c8 ignore next */ |
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const argumentNodes = |
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(_parentNode$arguments = parentNode.arguments) !== null && |
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_parentNode$arguments !== void 0 |
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? _parentNode$arguments |
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: []; |
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const seenArgs = groupBy(argumentNodes, (arg) => arg.name.value); |
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for (const [argName, argNodes] of seenArgs) { |
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if (argNodes.length > 1) { |
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context.reportError( |
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new GraphQLError( |
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`There can be only one argument named "${argName}".`, |
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{ |
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nodes: argNodes.map((node) => node.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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