forked from graphql/graphql-js
/
LoneAnonymousOperationRule.ts
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/
LoneAnonymousOperationRule.ts
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import { GraphQLError } from '../../error/GraphQLError';
import type { ASTVisitor } from '../../language/visitor';
import { Kind } from '../../language/kinds';
import type { ASTValidationContext } from '../ValidationContext';
/**
* Lone anonymous operation
*
* A GraphQL document is only valid if when it contains an anonymous operation
* (the query short-hand) that it contains only that one operation definition.
*
* See https://spec.graphql.org/draft/#sec-Lone-Anonymous-Operation
*/
export function LoneAnonymousOperationRule(
context: ASTValidationContext,
): ASTVisitor {
let operationCount = 0;
return {
Document(node) {
operationCount = node.definitions.filter(
(definition) => definition.kind === Kind.OPERATION_DEFINITION,
).length;
},
OperationDefinition(node) {
if (!node.name && operationCount > 1) {
context.reportError(
new GraphQLError(
'This anonymous operation must be the only defined operation.',
node,
),
);
}
},
};
}