58 lines
1.5 KiB
JavaScript
58 lines
1.5 KiB
JavaScript
import { GraphQLError } from '../../error/GraphQLError.mjs';
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/**
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* Lone Schema definition
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*
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* A GraphQL document is only valid if it contains only one schema definition.
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*/
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export function LoneSchemaDefinitionRule(context) {
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var _ref, _ref2, _oldSchema$astNode;
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const oldSchema = context.getSchema();
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const alreadyDefined =
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(_ref =
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(_ref2 =
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(_oldSchema$astNode =
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oldSchema === null || oldSchema === void 0
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? void 0
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: oldSchema.astNode) !== null && _oldSchema$astNode !== void 0
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? _oldSchema$astNode
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: oldSchema === null || oldSchema === void 0
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? void 0
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: oldSchema.getQueryType()) !== null && _ref2 !== void 0
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? _ref2
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: oldSchema === null || oldSchema === void 0
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? void 0
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: oldSchema.getMutationType()) !== null && _ref !== void 0
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? _ref
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: oldSchema === null || oldSchema === void 0
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? void 0
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: oldSchema.getSubscriptionType();
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let schemaDefinitionsCount = 0;
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return {
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SchemaDefinition(node) {
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if (alreadyDefined) {
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context.reportError(
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new GraphQLError(
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'Cannot define a new schema within a schema extension.',
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{
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nodes: node,
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},
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),
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);
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return;
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}
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if (schemaDefinitionsCount > 0) {
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context.reportError(
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new GraphQLError('Must provide only one schema definition.', {
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nodes: node,
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}),
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);
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}
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++schemaDefinitionsCount;
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},
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};
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}
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