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29 lines
1.3 KiB
29 lines
1.3 KiB
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$astNode;
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var oldSchema = context.getSchema();
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var alreadyDefined = (_ref = (_ref2 = (_oldSchema$astNode = oldSchema === null || oldSchema === void 0 ? void 0 : oldSchema.astNode) !== null && _oldSchema$astNode !== void 0 ? _oldSchema$astNode : oldSchema === null || oldSchema === void 0 ? void 0 : oldSchema.getQueryType()) !== null && _ref2 !== void 0 ? _ref2 : oldSchema === null || oldSchema === void 0 ? void 0 : oldSchema.getMutationType()) !== null && _ref !== void 0 ? _ref : oldSchema === null || oldSchema === void 0 ? void 0 : oldSchema.getSubscriptionType();
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var schemaDefinitionsCount = 0;
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return {
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SchemaDefinition: function SchemaDefinition(node) {
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if (alreadyDefined) {
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context.reportError(new GraphQLError('Cannot define a new schema within a schema extension.', node));
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return;
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}
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if (schemaDefinitionsCount > 0) {
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context.reportError(new GraphQLError('Must provide only one schema definition.', node));
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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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