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

// ./graphql/types/clientType.js

export default `

  type Client {

    id: ID!

    name: String

    age: Int

    products: [Product]

  }

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  type Query {

    clients: [Client]

    client(id: ID!): Client

  }

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  type Mutation {

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

  }

`;

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// ./graphql/types/productType.js

export default `

  type Product {

    id: ID!

    description: String

    price: Int

    client: Client

  }

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  type Query {

    products: [Product]

    product(id: ID!): Product

  }

`;

// ./graphql/types/index.js

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

import clientType from ‘./clientType‘;

import productType from ‘./productType‘;

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const types = [

  clientType,

  productType,

];

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// 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 });