34 lines
1.0 KiB
Plaintext
34 lines
1.0 KiB
Plaintext
// @flow strict
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import invariant from '../jsutils/invariant';
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import isPromise from '../jsutils/isPromise';
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import { parse } from '../language/parser';
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import { execute } from '../execution/execute';
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import { type GraphQLSchema } from '../type/schema';
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import {
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type IntrospectionQuery,
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type IntrospectionOptions,
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getIntrospectionQuery,
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} from './introspectionQuery';
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/**
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* Build an IntrospectionQuery from a GraphQLSchema
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*
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* IntrospectionQuery is useful for utilities that care about type and field
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* relationships, but do not need to traverse through those relationships.
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*
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* This is the inverse of buildClientSchema. The primary use case is outside
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* of the server context, for instance when doing schema comparisons.
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*/
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export function introspectionFromSchema(
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schema: GraphQLSchema,
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options?: IntrospectionOptions,
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): IntrospectionQuery {
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const queryAST = parse(getIntrospectionQuery(options));
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const result = execute(schema, queryAST);
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invariant(!isPromise(result) && !result.errors && result.data);
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return (result.data: any);
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}
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