graphql
Version:
A Query Language and Runtime which can target any service.
34 lines (29 loc) • 1.07 kB
Flow
// @flow strict
import invariant from '../jsutils/invariant';
import isPromise from '../jsutils/isPromise';
import { parse } from '../language/parser';
import { execute } from '../execution/execute';
import { type GraphQLSchema } from '../type/schema';
import {
type IntrospectionQuery,
type IntrospectionOptions,
getIntrospectionQuery,
} from './introspectionQuery';
/**
* Build an IntrospectionQuery from a GraphQLSchema
*
* IntrospectionQuery is useful for utilities that care about type and field
* relationships, but do not need to traverse through those relationships.
*
* This is the inverse of buildClientSchema. The primary use case is outside
* of the server context, for instance when doing schema comparisons.
*/
export function introspectionFromSchema(
schema: GraphQLSchema,
options?: IntrospectionOptions,
): IntrospectionQuery {
const queryAST = parse(getIntrospectionQuery(options));
const result = execute(schema, queryAST);
invariant(!isPromise(result) && !result.errors && result.data);
return (result.data: any);
}