GraphQL，猫鼬解析器RootQuery语法

Question

为了在Graphiql中返回此MongoDB实例中各项的列表，我的Resolver Query看起来应该是什么样的。 这是当前的解析器，它将所有项目记录到控制台，但未显示在graphiql中。

import { Biz } from './connectors';

const resolvers = {
  Query: {
    biz(_, { name, address }) {
      return Biz.find(function (err, biz) {
        if (err) return console.error(err);
        console.log(biz);
      });
    },
  },
};

export default resolvers;

graphiql查询和响应在这里：

schema.js中的类型定义

const typeDefinitions = `
type Biz {
 name: String
 address: String
}

type Query {
 biz(name: String, address: String): Biz
}

schema {
 query: Query
}
`;

export default [typeDefinitions]; 

这是连接器：

// businesses in mongo DB
    const MONGOLAB_URI = 'mongodb://user:password@ds888878.mlab.com:88778/db';
    const mongo = Mongoose.connect(MONGOLAB_URI, function (err, res) {
     if (err) {
       console.log ('ERROR connecting to: ' + MONGOLAB_URI + '. ' + err);
     } else {
       console.log ( 'Succeeded connected to: ' + MONGOLAB_URI );
     }
    });

    const BizSchema = Mongoose.Schema({
     _id: Object,
     address: String,
     city: String,
     country: String,
     heading: String,
     headingid: Number,
     img_url: String,
     name: String,
     objectId: String,
     phonenumber1: String,
     website: String,
     latitude: Number,
     longitude: Number,
    });

    const Biz = Mongoose.model('bizs', BizSchema);

export { Biz };

db中的样本对象

{
               "_id": {
                   "$oid": "573e8c9b1379f0f2fad98290"
               },
               "accountid": 1404,
               "address": "737, Grand Rue,",
               "city": "Port-au-Prince",
               "country": "Haiti",
               "createdAt": "10/26/2015 7:27:42 PM",
               "heading": "Computer, Printers and Supplies",
               "headingid": 323,
               "img_url": "https://res.cloudinary.com/klik-io/image/upload/v1454850817/pages-jaunes-haiti-icon_sosoco.png",
               "name": "A & M Entreprises",
               "objectId": "0lw9lVl23j",
               "phonenumber1": "+509 3770 0303",
               "website": "http://868.ht"
            }

这是server.js文件。

import express from 'express';
import { apolloServer } from 'apollo-server';
import Schema from './src/data/schema';
// import Mocks from './data/mocks';
import Resolvers from './src/data/resolvers';

const GRAPHQL_PORT = 8080;

const graphQLServer = express();
graphQLServer.use('/graphql', apolloServer({
  graphiql: true,
  pretty: true,
  schema: Schema,
  resolvers: Resolvers
  // allowUndefinedInResolve: true,
  // printErrors: true,
  // mocks: Mocks,
}));
graphQLServer.listen(GRAPHQL_PORT, () => console.log(
  `GraphQL Server is now running on http://localhost:${GRAPHQL_PORT}/graphql`

））;

Answer 1

我在根查询中解决了这个问题。 我注意到文档中的帖子返回了帖子数组[Post]并应用了该概念。

在schema.js中，我使用[Biz]将Query更改为一个数组：

type Query {
  biz(name: String, address: String): [Biz]
}

然后在resolvers.js中，将resolvers.Query return语句的语法更改为以下内容：

Query: {
        biz(_, {name, address}) {
            return Biz.find();
        }
    }