Sha256: 91ae9e731875b4934809316d0fc296ec72a2baff051c0530e903d8ad967d7935
Contents?: true
Size: 1.25 KB
Versions: 26
Compression:
Stored size: 1.25 KB
Contents
import { GraphQLError } from '../../error/GraphQLError.mjs';
/**
* Unique type names
*
* A GraphQL document is only valid if all defined types have unique names.
*/
export function UniqueTypeNamesRule(context) {
const knownTypeNames = Object.create(null);
const schema = context.getSchema();
return {
ScalarTypeDefinition: checkTypeName,
ObjectTypeDefinition: checkTypeName,
InterfaceTypeDefinition: checkTypeName,
UnionTypeDefinition: checkTypeName,
EnumTypeDefinition: checkTypeName,
InputObjectTypeDefinition: checkTypeName,
};
function checkTypeName(node) {
const typeName = node.name.value;
if (schema !== null && schema !== void 0 && schema.getType(typeName)) {
context.reportError(
new GraphQLError(
`Type "${typeName}" already exists in the schema. It cannot also be defined in this type definition.`,
{
nodes: node.name,
},
),
);
return;
}
if (knownTypeNames[typeName]) {
context.reportError(
new GraphQLError(`There can be only one type named "${typeName}".`, {
nodes: [knownTypeNames[typeName], node.name],
}),
);
} else {
knownTypeNames[typeName] = node.name;
}
return false;
}
}
Version data entries
26 entries across 26 versions & 1 rubygems