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57 lines
1.5 KiB
57 lines
1.5 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$astNode; |
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const oldSchema = context.getSchema(); |
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const alreadyDefined = |
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(_ref = |
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(_ref2 = |
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(_oldSchema$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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