Function checkLimit

packages/query/src/graphql/plugins/QueryAliasLimitPlugin.ts:7–17

(document: DocumentNode, limit: number)

import {GraphQLSchema, GraphQLError, DocumentNode, visit} from 'graphql';

function checkLimit(document: DocumentNode, limit: number): void {
  let aliasCount = 0;
  visit(document, {
    Field(node) {
      if (node.alias) {
        aliasCount += 1;
        if (aliasCount > limit) throw new GraphQLError('Alias limit exceeded');
      }
    },
  });
}

export function queryAliasLimit(options: {schema: GraphQLSchema; limit?: number}): ApolloServerPlugin {
  return {