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