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Versions: 26
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Contents
import { GraphQLError } from '../../error/GraphQLError.mjs';
/**
* Unique operation names
*
* A GraphQL document is only valid if all defined operations have unique names.
*
* See https://spec.graphql.org/draft/#sec-Operation-Name-Uniqueness
*/
export function UniqueOperationNamesRule(context) {
const knownOperationNames = Object.create(null);
return {
OperationDefinition(node) {
const operationName = node.name;
if (operationName) {
if (knownOperationNames[operationName.value]) {
context.reportError(
new GraphQLError(
`There can be only one operation named "${operationName.value}".`,
{
nodes: [
knownOperationNames[operationName.value],
operationName,
],
},
),
);
} else {
knownOperationNames[operationName.value] = operationName;
}
}
return false;
},
FragmentDefinition: () => false,
};
}
Version data entries
26 entries across 26 versions & 1 rubygems