@graphql-tools/graphql
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Fork of GraphQL.js
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JavaScript
import { groupBy } from '../../jsutils/groupBy.js';
import { GraphQLError } from '../../error/GraphQLError.js';
/**
* Unique argument definition names
*
* A GraphQL Object or Interface type is only valid if all its fields have uniquely named arguments.
* A GraphQL Directive is only valid if all its arguments are uniquely named.
*/
export function UniqueArgumentDefinitionNamesRule(context) {
return {
DirectiveDefinition(directiveNode) {
var _a;
// FIXME: https://github.com/graphql/graphql-js/issues/2203
/* c8 ignore next */
const argumentNodes = (_a = directiveNode.arguments) !== null && _a !== void 0 ? _a : [];
return checkArgUniqueness(`@${directiveNode.name.value}`, argumentNodes);
},
InterfaceTypeDefinition: checkArgUniquenessPerField,
InterfaceTypeExtension: checkArgUniquenessPerField,
ObjectTypeDefinition: checkArgUniquenessPerField,
ObjectTypeExtension: checkArgUniquenessPerField,
};
function checkArgUniquenessPerField(typeNode) {
var _a, _b;
const typeName = typeNode.name.value;
// FIXME: https://github.com/graphql/graphql-js/issues/2203
/* c8 ignore next */
const fieldNodes = (_a = typeNode.fields) !== null && _a !== void 0 ? _a : [];
for (const fieldDef of fieldNodes) {
const fieldName = fieldDef.name.value;
// FIXME: https://github.com/graphql/graphql-js/issues/2203
/* c8 ignore next */
const argumentNodes = (_b = fieldDef.arguments) !== null && _b !== void 0 ? _b : [];
checkArgUniqueness(`${typeName}.${fieldName}`, argumentNodes);
}
return false;
}
function checkArgUniqueness(parentName, argumentNodes) {
const seenArgs = groupBy(argumentNodes, arg => arg.name.value);
for (const [argName, argNodes] of seenArgs) {
if (argNodes.length > 1) {
context.reportError(new GraphQLError(`Argument "${parentName}(${argName}:)" can only be defined once.`, {
nodes: argNodes.map(node => node.name),
}));
}
}
return false;
}
}