Sha256: 30ac8574e027702324f3cb1cbf2f0265ee107a76d08e91577fc6727bbde6aff7
Contents?: true
Size: 1.18 KB
Versions: 26
Compression:
Stored size: 1.18 KB
Contents
import { GraphQLError } from '../../error/GraphQLError.mjs';
/**
* Unique directive names
*
* A GraphQL document is only valid if all defined directives have unique names.
*/
export function UniqueDirectiveNamesRule(context) {
const knownDirectiveNames = Object.create(null);
const schema = context.getSchema();
return {
DirectiveDefinition(node) {
const directiveName = node.name.value;
if (
schema !== null &&
schema !== void 0 &&
schema.getDirective(directiveName)
) {
context.reportError(
new GraphQLError(
`Directive "@${directiveName}" already exists in the schema. It cannot be redefined.`,
{
nodes: node.name,
},
),
);
return;
}
if (knownDirectiveNames[directiveName]) {
context.reportError(
new GraphQLError(
`There can be only one directive named "@${directiveName}".`,
{
nodes: [knownDirectiveNames[directiveName], node.name],
},
),
);
} else {
knownDirectiveNames[directiveName] = node.name;
}
return false;
},
};
}
Version data entries
26 entries across 26 versions & 1 rubygems