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Versions: 26
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Contents
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),
},
),
);
}
}
}
}
Version data entries
26 entries across 26 versions & 1 rubygems