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Contents?: true
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Versions: 26
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Stored size: 1.87 KB
Contents
import { GraphQLError } from '../../error/GraphQLError.mjs';
import { isEnumType } from '../../type/definition.mjs';
/**
* Unique enum value names
*
* A GraphQL enum type is only valid if all its values are uniquely named.
*/
export function UniqueEnumValueNamesRule(context) {
const schema = context.getSchema();
const existingTypeMap = schema ? schema.getTypeMap() : Object.create(null);
const knownValueNames = Object.create(null);
return {
EnumTypeDefinition: checkValueUniqueness,
EnumTypeExtension: checkValueUniqueness,
};
function checkValueUniqueness(node) {
var _node$values;
const typeName = node.name.value;
if (!knownValueNames[typeName]) {
knownValueNames[typeName] = Object.create(null);
} // FIXME: https://github.com/graphql/graphql-js/issues/2203
/* c8 ignore next */
const valueNodes =
(_node$values = node.values) !== null && _node$values !== void 0
? _node$values
: [];
const valueNames = knownValueNames[typeName];
for (const valueDef of valueNodes) {
const valueName = valueDef.name.value;
const existingType = existingTypeMap[typeName];
if (isEnumType(existingType) && existingType.getValue(valueName)) {
context.reportError(
new GraphQLError(
`Enum value "${typeName}.${valueName}" already exists in the schema. It cannot also be defined in this type extension.`,
{
nodes: valueDef.name,
},
),
);
} else if (valueNames[valueName]) {
context.reportError(
new GraphQLError(
`Enum value "${typeName}.${valueName}" can only be defined once.`,
{
nodes: [valueNames[valueName], valueDef.name],
},
),
);
} else {
valueNames[valueName] = valueDef.name;
}
}
return false;
}
}
Version data entries
26 entries across 26 versions & 1 rubygems