如何向"error array"添加一个字符串？

Question

我是新手graphql.I使用Node.jsapollo-server.when我重新设置报错，添加对象报错array.but如何添加字符串而不是对象 ?.

例子

throw Error("error")

{"errors":["error]}

Answer 1

您可以使用 docs 中的 formatError。

Functions to format the errors and response returned from the server, as well as the parameters to graphql execution(runQuery)

例如

server.ts

import { ApolloServer, gql } from 'apollo-server';
import { GraphQLError } from 'graphql';

const typeDefs = gql`
  type Query {
    _: Boolean
  }
`;
const resolvers = {
  Query: {
    _: () => {
      throw new Error('error');
    },
  },
};
const server = new ApolloServer({
  typeDefs,
  resolvers,
  formatError(error: GraphQLError) {
    return error.message as any;
  },
});

server.listen().then(({ url }) => {
  console.log(`Apollo server is listening on ${url}`);
});

客户端的 GraphQL 查询：

query {
  _ 
}

回复：

{
  "errors": [
    "error"
  ],
  "data": {
    "_": null
  }
}

如何向"error array"添加一个字符串？

How to add a string to the "error array"?

node.js

graphql

apollo-server