使用merge-graphql-schemas 进行graphql schema 以及resovler 合并

merge-graphql-schemas 是一个方便的工具，可以进行schema 以及resovler 的合并处理

一个schema 合并参考demo

• schema 定义

// ./graphql/types/clientType.js

export default `

  type Client {

    id: ID!

    name: String

    age: Int

    products: [Product]

  }

​

  type Query {

    clients: [Client]

    client(id: ID!): Client

  }

​

  type Mutation {

    addClient(name: String!, age: Int!): Client

  }

`;

​

// ./graphql/types/productType.js

export default `

  type Product {

    id: ID!

    description: String

    price: Int

    client: Client

  }

​

  type Query {

    products: [Product]

    product(id: ID!): Product

  }

`;

• 合并

// ./graphql/types/index.js

import { mergeTypes } from 'merge-graphql-schemas';

import clientType from './clientType';

import productType from './productType';

​

const types = [

  clientType,

  productType,

];

​

// NOTE: 2nd param is optional, and defaults to false

// Only use if you have defined the same type multiple times in

// different files and wish to attempt merging them together.

export default mergeTypes(types, { all: true });

说明

如果在早期项目规划schema 约定还是比较好的时候merge-graphql-schemas 还是一个不错的方案
同时已经好好多解决方案了，apollo 团队的联邦还是很不错的，使用此功能，我们可以方便的进行graphql
api 聚合，如果对于后端约定比较好的，做为graphql gateway 的一个工具也是不错的

参考资料

https://github.com/Urigo/merge-graphql-schemas