Question

我正在使用graphql-yoga和node-fetch（在node.js中）从API检索数据。这是我的代码的样子：

const {GraphQLServer} = require('graphql-yoga');
const fetch = require('node-fetch');

const typeDefs = `

    type Query {
        getTimeseries: Timeseries
    }

    type Timeseries {
        end_date: String
        start_date: String
    }
`;

const resolvers = {

    Query: {

        getTimeseries: async (_, {}) => {
            const response = await fetch(`https://fxmarketapi.com/apitimeseries?api_key=48Ki5q0sTKFQR3fuTvHw&currency=EURUSD,GBPUSD&interval=daily&start_date=2020-04-30&end_date=2020-05-01&format=ohlc`);
            return response.json();
        },
    },
};

const server = new GraphQLServer({
    typeDefs,
    resolvers
});
server.start(() => console.log('Server is running on localhost:4000'));

从我正在使用的API端点运行数据时获得的数据如下所示：

{
    "end_date": "2020-05-01",
    "price": {
        "2020-04-30": {
            "EURUSD": {
                "close": 1.09528,
                "high": 1.09726,
                "low": 1.08331,
                "open": 1.08735
            },
            "GBPUSD": {
                "close": 1.25951,
                "high": 1.26432,
                "low": 1.24292,
                "open": 1.24671
            }
        },
        "2020-05-03": {
            "EURUSD": {
                "close": 1.09802,
                "high": 1.10152,
                "low": 1.09348,
                "open": 1.09528
            },
            "GBPUSD": {
                "close": 1.24941,
                "high": 1.25993,
                "low": 1.24859,
                "open": 1.25918
            }
        }
    },
    "start_date": "2020-04-30"
}

基于上面的代码，当我运行查询时，我只能检索start_date和end_date字段所保存的值。但是，我不知道如何创建类型定义来检索price下的对象，因为字段名称是日期，并且每天都在变化。请帮助我为将用于检索此数据的查询编写类型定义和解析器。

Ps：运行测试时，您可能会遇到一些错误代码。这应该可以帮助您了解它是哪个错误：

202 -   Requested currency code invalid or not in plan for Live and Convert Endpoints
203 -   Requested currency code invalid or not in plan for the Historical, Change, Timeseries and Pandas Endpoints
301 -   Invalid date type
302 -   Requested date is a weekend applicable to Historical, Change, Timeseries and Pandas Endpoints
401 -   Api_Key is invalid
501 -   Requestout of Range
502 -   Interval Parameters invalid

有没有一种方法可以通过在GraphQL中更改属性名称来为对象定义类型定义？

0 个答案: