26 lines
742 B
Text
Executable file
26 lines
742 B
Text
Executable file
// @flow strict
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import { GraphQLError } from '../../error/GraphQLError';
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import type { ASTVisitor } from '../../language/visitor';
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import type { ValidationContext } from '../ValidationContext';
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/**
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* Known fragment names
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*
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* A GraphQL document is only valid if all `...Fragment` fragment spreads refer
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* to fragments defined in the same document.
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*/
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export function KnownFragmentNamesRule(context: ValidationContext): ASTVisitor {
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return {
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FragmentSpread(node) {
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const fragmentName = node.name.value;
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const fragment = context.getFragment(fragmentName);
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if (!fragment) {
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context.reportError(
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new GraphQLError(`Unknown fragment "${fragmentName}".`, node.name),
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);
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}
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},
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};
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}
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