You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
48 lines
1.2 KiB
48 lines
1.2 KiB
4 months ago
|
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;
|
||
|
},
|
||
|
};
|
||
|
}
|