hasura graphql-engine v1.0.0-alpha30 remote schema stitch 试用

新的hasura graphql-engine 代码仓库中已经包含了一个基于express 的简单graphql server，
可以用来测试模式拼接

graphql server 代码

• 项目结构

├── Dockerfile
├── README.md
├── now.json
├── package.json
└── server.js

• 代码说明

package.json: 依赖包
{
  "name": "nodejs-express-gql-server",
  "version": "1.0.0",
  "description": "A GraphQL server boilerplate for NodeJS-Express using graphql-js library",
  "main": "server.js",
  "scripts": {
    "test": "echo "Error: no test specified" && exit 1",
    "start": "node -r esm server.js"
  },
  "author": "Hasura",
  "license": "MIT",
  "dependencies": {
    "express": "^4.16.4",
    "express-graphql": "^0.7.1",
    "graphql": "^14.0.2"
  },
  "devDependencies": {
    "esm": "^3.0.84"
  }
}
server.js： 具体代码
const express = require('express');
const graphqlHTTP = require('express-graphql');
const { buildSchema } = require('graphql');

let count = 0;
const port = process.env.port || 3000;

// Construct a schema, using GraphQL schema language
const schema = buildSchema(`
  type Query {
    hello: String!
    count: Int!
  }

  type Mutation {
    increment_counter: count_mutation_response!
  }

  type count_mutation_response {
    new_count: Int!
  }
`);

// The root provides a resolver function for each API endpoint
const root = {
  hello: () => {
    return 'Hello world!';
  },
  count: () => {
    return count;
  },
  increment_counter: () => {
    return { new_count: ++count }
  }
};

var app = express();
app.use('/graphql', graphqlHTTP({
  schema: schema,
  rootValue: root,
  graphiql: true,
}));
app.listen(port);
console.log(`Running a GraphQL API server at localhost:${port}/graphql`);
Dockerfile： 代码的dockeer 运行
FROM node:8

WORKDIR /server

COPY ./package.json /server/

RUN npm install

COPY . /server/

CMD ["npm", "start"]

hasura graphql-engine 环境准备

graphql server 的我已经推送到dockerhub 了 镜像为：dalongrong/stitchmerge

• docker-compose 文件

version: '3.6'
services:
  postgres2:
    image: postgres:9.6
    ports:
    - "5432:5432"
    environment:
    - "POSTGRES_PASSWORD:dalong"
    volumes:
    - ./db_data2:/var/lib/postgresql/data
  postgres:
    image: postgres:9.6
    ports:
    - "5435:5432"
    environment:
    - "POSTGRES_PASSWORD:dalong"
    volumes:
    - ./db_data:/var/lib/postgresql/data
  benthos:
    image: jeffail/benthos
    volumes:
    - "./configs/webhook.yaml:/benthos.yaml"
    ports:
    - "4195:4195"
  node-exress:
    image: dalongrong/stitchmerge
    ports:
    - "3000:3000"
  graphql-engine2:
    image: hasura/graphql-engine:v1.0.0-alpha30
    ports:
    - "8080:8080"
    depends_on:
    - "postgres"
    environment:
    - "POSTGRES_PASSWORD:dalong"
    command: >
      /bin/sh -c "
      graphql-engine --database-url postgres://postgres:dalong@postgres2:5432/postgres serve --enable-console;
      "
  graphql-engine:
    image: hasura/graphql-engine:v1.0.0-alpha29
    ports:
    - "8090:8080"
    depends_on:
    - "postgres"
    environment:
    - "POSTGRES_PASSWORD:dalong"
    command: >
      /bin/sh -c "
      graphql-engine --database-url postgres://postgres:dalong@postgres:5432/postgres serve --enable-console;
      "

• 运行效果
  graphql server：
  http://localhost:3000/graphql
  
  引擎界面
  

试用模式拼接功能

• 添加配置
  
• schema 信息
  
• 测试
  
  但是，进行混合的时候就有问题了,新版发布的说明里面也有提示，后期应该可以解决
  
• 查看表结构
  
  

说明

这个功能还是很不错的，只是期待可以解决好多已知的问题

参考资料

https://github.com/hasura/graphql-engine
https://github.com/rongfengliang/hasura-graphql-event-benthos