graphql-mesh 试用

前边有简单介绍多graphql-mesh 以下是一个简单的试用

环境准备

• 项目初始化

yarn  init -y

• 添加依赖

yarn add graphql @graphql-mesh/runtime @graphql-mesh/cli @graphql-mesh/openapi

• pacakge.json 内容

{

  "name": "first",

  "version": "1.0.0",

  "main": "index.js",

  "license": "MIT",

  "dependencies": {

    "@graphql-mesh/cli": "^0.0.16",

    "@graphql-mesh/openapi": "^0.0.16",

    "@graphql-mesh/runtime": "^0.0.16",

    "graphql": "^14.6.0"

  },

  "scripts": {

    "start": "graphql-mesh serve"

  }

}

简单项目使用

• 配置
  .meshrc.yml 文件

 

sources:

  - name: Wiki

    source: https://api.apis.guru/v2/specs/wikimedia.org/1.0.0/swagger.yaml

    handler:

      name: openapi

• 启动

yarn start

• 效果
  启动的GraphiQL 界面
  

   

   

• 查询

 

query wikipediaMetrics {

  getMetricsPageviewsAggregateProjectAccessAgentGranularityStartEnd(

    access: ALL_ACCESS

    agent: USER

    start: "20200101"

    end: "20200226"

    project: "en.wikipedia.org"

    granularity: DAILY

  ) {

    items {

      views

    }

  }

}

• 应用使用

const { getMesh, parseConfig } = require('@graphql-mesh/runtime');

const { ApolloServer } = require('apollo-server');

​

async function test() {

  // This will load the config file from the default location (process.cwd)

  const meshConfig = await parseConfig();

  const { execute, schema, contextBuilder } = await getMesh(meshConfig);

​

  // Use `execute` to run a query directly and fetch data from your APIs

  const { data, errors } = await execute(/* GraphQL */ `

    query wikipediaMetrics {

      getMetricsPageviewsAggregateProjectAccessAgentGranularityStartEnd(

        access: ALL_ACCESS

        agent: USER

        start: "20200101"

        end: "20200226"

        project: "en.wikipedia.org"

        granularity: MONTHLY

      ) {

        items {

          views

        }

      }

    }

  `);

​

  // Or, if you wish to make this schema publicly available, expose it using any GraphQL server with the correct context, for example:

  const server = new ApolloServer({

    schema,

    context: contextBuilder

  });

}

说明

从使用上的基本感受就是graphql-mesh 很方便

参考资料

https://github.com/Urigo/graphql-mesh