{"id":1896,"date":"2019-05-13T19:52:16","date_gmt":"2019-05-13T10:52:16","guid":{"rendered":"https:\/\/lovelinux.mydns.jp\/?p=1896"},"modified":"2019-05-13T22:17:11","modified_gmt":"2019-05-13T13:17:11","slug":"apollo-server%e3%80%81graphql%e3%80%81nodejs%e3%80%81sequesize%e3%80%81%e3%83%95%e3%83%ad%e3%83%b3%e3%83%88%e3%81%abreactredux%e3%81%a7-%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%e3%83%a1%e3%83%b3-2","status":"publish","type":"post","link":"https:\/\/lovelinux.mydns.jp\/?p=1896","title":{"rendered":"Apollo Server\u3001GraphQL\u3001nodejs\u3001sequesize\u3001\u30d5\u30ed\u30f3\u30c8\u306bReact+Redux\u3067 \u30de\u30b9\u30bf\u30fc\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3092\u4f5c\u308d\u3046! \u301cVol.2"},"content":{"rendered":"

\u524d\u56de\u306b\u7d9a\u3044\u3066<\/h3>\n

\u3068\u308a\u3042\u3048\u305a\u3001GraphQL\u3092\u5229\u7528\u3067\u304d\u308b Apollo Server\u304c\u8d77\u52d5\u3067\u304d\u305f\u306e\u3067\u3001
\nGraphQL\u3092\u4f7f\u3063\u3066\u3001\u5546\u54c1\u30c6\u30fc\u30d6\u30eb(products)\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u306f\uff15\u56de\u306b\u5206\u3051\u3066\u9023\u8f09\u3059\u308b\u3001\u7b2c\uff12\u56de\u306e\u8a18\u4e8b\u3067\u3059\u3002<\/p>\n

<\/p>\n

\u30fb\u7b2c\uff11\u56de Apollo Server\u304c\u52d5\u304f\u3068\u3053\u308d\u307e\u3067<\/a><\/p>\n

\u30fb\u7b2c\uff12\u56de Apollo Server\u914d\u4e0b\u3067\u3001GraphQL\u3092\u4f7f\u3063\u3066\u5546\u54c1\u30de\u30b9\u30bf\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\uff08\u3053\u306e\u8a18\u4e8b\uff09<\/a><\/p>\n

\u30fb\u7b2c\uff13\u56de \u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u3092React\uff0bRedux\uff0bgraphql-request\u3092\u4f7f\u3063\u3066\u5b9f\u88c5\u3059\u308b<\/a><\/p>\n

\u30fb\u7b2c\uff14\u56de \u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u304b\u3089graphql-request\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u30fb\u8868\u793a\u3059\u308b<\/a><\/p>\n

\u30fb\u7b2c\uff15\u56de graphql-request\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30fc\u30bf\u3092\u767b\u9332\u30fb\u4fee\u6b63\u30fb\u524a\u9664\u3059\u308b<\/a><\/p>\n

<\/font><\/p>\n

\u5b8c\u6210\u30d5\u30a1\u30a4\u30eb\u30c4\u30ea\u30fc<\/h3>\n

\u8aac\u660e\u304c\u308f\u304b\u308a\u306b\u304f\u3044\u3068\u601d\u3046\u306e\u3067\u3001\u5b8c\u6210\u5f62\u306e\u30d5\u30a1\u30a4\u30eb\u30c4\u30ea\u30fc\u3092\u793a\u3057\u3066\u304a\u304d\u307e\u3059\u3002
\n\"Screenshot<\/a><\/p>\n

\u30c6\u30fc\u30d6\u30eb\u5b9a\u7fa9\uff08\u30b9\u30ad\u30fc\u30de\u4f5c\u6210\uff09<\/h3>\n

[bash]
\n$ mkdir datasources<\/p>\n

[\/bash]<\/p>\n

\u5546\u54c1\u30c6\u30fc\u30d6\u30eb\u306e\u69cb\u9020\u306f id\/\u5546\u54c1\u540d\/\u91d1\u984d\u3000\u3060\u3051\u306e\u30b7\u30f3\u30d7\u30eb\u306a\u3082\u306e\u306b\u3057\u307e\u3059\u3002<\/p>\n

[bash]
\n$ nano datasources\/create_table.sql
\n[\/bash]<\/p>\n

[bash]
\ncreate table products (
\n id SERIAL,
\n product_name TEXT,
\n price INTEGER,
\n “createdAt” timestamp with time zone,
\n “updatedAt” timestamp with time zone,
\nprimary key (id));<\/p>\n

[\/bash]<\/p>\n

\u30e2\u30c7\u30eb\u5b9a\u7fa9<\/h3>\n

\u5546\u54c1\u30c6\u30fc\u30d6\u30eb\u306e\u3000CRUD\u3092\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\uff08\u30e2\u30c7\u30eb\uff09\u306b\u5b9a\u7fa9\u3057\u307e\u3059\u3002
\n\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30a2\u30af\u30bb\u30b9\u306b\u306f sequelize\u3092\u4f7f\u3044\u307e\u3059\u306e\u3067\u3001\u305d\u306e\u4f7f\u3044\u65b9\u306f\u3001\u5404\u81ea\u5b66\u3093\u3067\u304f\u3060\u3055\u3044\u306d\u3002
\n\uff08\u3053\u306e\u7a0b\u5ea6\u3060\u3068\u3001\u30bd\u30fc\u30b9\u3092\u898b\u305f\u307e\u307e\u30b7\u30f3\u30d7\u30eb\u306a\u3082\u306e\u3067\u3059\u304c\u30fb\u30fb\u30fb\uff09<\/p>\n

[bash]
\n$ nano datasources\/product.js
\n[\/bash]<\/p>\n

[bash]<\/p>\n

import SQL from “sequelize”;
\nimport {DataSource } from “apollo-datasource”;<\/p>\n

class ProductAPI extends DataSource {
\n constructor( {store} ) {
\n super();
\n this.store = store;
\n }<\/p>\n

initialize(config) {
\n this.context = config.context;
\n }<\/p>\n

async add({product_name, price}) {
\n return await this.store.products.create({product_name: product_name, price: price});
\n }<\/p>\n

async findOne({id}) {
\n return await this.store.products.findByPk(id);
\n }<\/p>\n

async remove({id}) {
\n const rec = await this.store.products.findByPk(id);
\n const ret = await rec.destroy();
\n return {id:0, product_name: “”, price: 0};
\n }<\/p>\n

async edit({id, product_name, price}){
\n const rec = await this.store.products.findByPk(id);
\n rec.product_name = product_name;
\n rec.price = price;
\n return await rec.save();
\n }<\/p>\n

}<\/p>\n

export default ProductAPI;<\/p>\n

[\/bash]<\/p>\n

index.js\u306e\u8abf\u6574<\/h3>\n

\u4f5c\u6210\u3057\u305f\u30e2\u30c7\u30eb\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3001\u4ee5\u4e0b\u306e\uff11\u884c\u3092\u8ffd\u8a18\u3057\u307e\u3059\u3002<\/p>\n

[bash]
\n$ nano index.js
\n[\/bash]<\/p>\n

[bash]<\/p>\n

const store = createStore();<\/p>\n

import ProductAPI from “.\/datasources\/product”; <<<< \u3053\u306e\u884c\u3092\u8ffd\u8a18\n\n\nconst dataSources = () => ({
\n productAPI: new ProductAPI({store}),
\n});<\/p>\n

[\/bash]<\/p>\n

schema.js\u306bGraphQL API\u306e\u5b9a\u7fa9\u3092\u4f5c\u6210<\/h3>\n

\u3055\u3066\u3001\u3044\u3044\u52a0\u6e1b\u306b\u5b9a\u7fa9\u3057\u3066\u3044\u305f schema.js\u3092\u3061\u3083\u3093\u3068\u5b9f\u88c5\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

id\u6307\u5b9a\u3057\u3066\u3001\uff11\u30ec\u30b3\u30fc\u30c9\u3092\u5f97\u308b \u300cgetProduct\u300d\u3000\u3068\u3001\u3000\u30e2\u30fc\u30c9\u6307\u5b9a\u3057\u3066
\n\u30c7\u30fc\u30bf\u306e\u767b\u9332\u30fb\u4fee\u6b63\u30fb\u524a\u9664\u3092\u884c\u3046 \u300cregisterProduct\u300d\u3092\u5b9a\u7fa9\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

[bash]
\n$ nano schema.js
\n[\/bash]<\/p>\n

[bash]<\/p>\n

import { gql } from “apollo-server”;<\/p>\n

export default gql`
\n scalar TimestampType
\n type Query {
\n getProduct(id: Int!): Product!
\n }<\/p>\n

type Mutation{
\n registerProduct(mode: String!, id: Int!, product_name: String!, price: Int): Product!
\n }<\/p>\n

type Product {
\n id: Int!
\n product_name: String!
\n price: Int!
\n }
\n`;
\n[\/bash]<\/p>\n

resolvers.js\u306bGraphQL API\u3092\u5b9f\u88c5<\/h3>\n

resolvers.js\u3000\u306b schema.js \u3067\u5b9a\u7fa9\u3057\u305f Query\u3068Mutation\u306e\u5b9f\u88c5\u3092\u3057\u307e\u3057\u3087\u3046\u3002
\n\u57fa\u672c\u306f\u3001product\u30e2\u30c7\u30eb\u306b\u4f5c\u6210\u3057\u305f\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n

[bash]
\nimport { ForbiddenError } from ‘apollo-server’;<\/p>\n

export default {
\n Query: {
\n getProduct: async(_, {id}, {dataSources}) => {
\n return await dataSources.productAPI.findOne({id})
\n },
\n },<\/p>\n

Mutation: {
\n registerProduct: async(_, {mode, id, product_name, price}, {dataSources}) => {
\n let rec ;
\n if (mode === “ADD”){
\n rec = await dataSources.productAPI.add({product_name, price});
\n }
\n else if (mode === “EDIT”){
\n rec = await dataSources.productAPI.edit({id, product_name, price});
\n }
\n else {
\n rec = await dataSources.productAPI.remove({id});
\n }<\/p>\n

return rec;
\n },<\/p>\n

}<\/p>\n

}<\/p>\n

[\/bash]<\/p>\n

\u5b9fDB \u306b create table<\/h3>\n

\u3044\u3056\u3001\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u524d\u306b Postgresql\u306b(mysql\u3067\u3082\u306a\u3093\u3067\u3082\u3044\u3044\u3067\u3059\u304c\u30fb\u30fb\u30fb\uff09
\nproducts \u30c6\u30fc\u30d6\u30eb\u3092 create table \u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

[bash]
\ncreate table products (
\n id SERIAL,
\n product_name TEXT,
\n price INTEGER,
\n “createdAt” timestamp with time zone,
\n “updatedAt” timestamp with time zone,
\nprimary key (id));<\/p>\n

[\/bash]<\/p>\n

Apollo \u306e Playground\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30fc\u30bf\u3092\u767b\u9332\u3057\u3066\u307f\u3088\u3046!<\/h3>\n

\u3067\u306f\u3001\u5b9f\u969b\u306b\u5148\u7a0b\u4f5c\u3063\u305f schema.js\u3068resolver.js\u3068 product.js\uff08\u30e2\u30c7\u30eb\uff09\u3092
\n\u4f7f\u3063\u3066\u3000\u30c7\u30fc\u30bf\u3092\u767b\u9332\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n

\u767b\u9332\u3059\u308b\u30c7\u30fc\u30bf\u306f<\/p>\n

\r\n\r\n\u5546\u54c1\u540d                \u4fa1\u683c\r\n----------------------------------\r\niPhone X Silver      87000\r\nGaraxy S10           72000\r\nFujitsu \u3089\u304f\u3089\u304f\u30db\u30f3  59000\r\n<\/code>\r\n<\/pre>\n
\u30d6\u30e9\u30a6\u30b6\u30fc\u3092\u8d77\u52d5\u3057\u3001http:\/\/localhost:4000\u3000\u3068\u3057\u3066\u304f\u3060\u3055\u3044\u3002
\n\uff08\u305d\u306e\u524d\u306b npm start \u3082\u5fd8\u308c\u305a\u306b\uff09<\/p>\n
\u3053\u3093\u306a\u753b\u9762\u304c\u51fa\u308c\u3070OK\u3067\u3059\u3002
\n\u5de6\u5074\u306b\u3001 GraphQL\u8a00\u8a9e\u3067\u30af\u30a8\u30ea\u3092\u8a18\u8ff0\u3057\u3066\u3001\u771f\u3093\u4e2d\u306e\u4e09\u89d2\u30dc\u30bf\u30f3\u3067\u5b9f\u884c\u3059\u308b\u3068\u3001\u7d50\u679c\u304c\u53f3\u5074\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n
\"Screenshot<\/a><\/p>\n
\u5546\u54c1\u30c7\u30fc\u30bf\u306e\u767b\u9332<\/h4>\n
\u4ee5\u4e0b\u306e\uff13\u3064\u306e\u30af\u30a8\u30ea\uff08mutation)\u3092\u5b9f\u884c\u3057\u30c7\u30fc\u30bf\u3092\u767b\u9332\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002
\n[bash]
\nmutation RegisterProduct {
\n  registerProduct(mode: “ADD”, id:0, product_name: “iPhone X Silver”, price: 87000){
\n    id
\n  }
\n}
\n[\/bash]<\/p>\n
[bash]
\nmutation RegisterProduct {
\n  registerProduct(mode: “ADD”, id:0, product_name: “Garaxy S10”, price: 72000){
\n    id
\n  }
\n}<\/p>\n
[\/bash]<\/p>\n
[bash]
\nmutation RegisterProduct {
\n  registerProduct(mode: “ADD”, id:0, product_name: “Fujitsu \u3089\u304f\u3089\u304f\u30db\u30f3”, price: 59000){
\n    id
\n  }
\n}
\n[\/bash]<\/p>\n
\"Screenshot<\/a><\/p>\n
\u5546\u54c1\u30c7\u30fc\u30bf\u306e\u4fee\u6b63<\/h4>\n
\u3067\u306f\u3001iPhone\u306e\u4fa1\u683c\u3092\u30a2\u30c3\u30d7\u3057\u3066\u307f\u307e\u3057\u3087\u3046<\/p>\n
[bash]
\nmutation RegisterProduct {
\n  registerProduct(mode: “EDIT”, id:1, product_name: “iPhone X Silver”, price: 93000){
\n    id
\n  }
\n}
\n[\/bash]<\/p>\n
\"Screenshot<\/a><\/p>\n
\u5546\u54c1\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u8fbc\u307f<\/h4>\n
\u30c7\u30fc\u30bf\u306f ID\uff1d1\u301c3 \u3067\u3067\u304d\u3066\u3044\u308b\u306e\u3067\u3001Query\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30fc\u30bf\u3092\u30ea\u30fc\u30c9\u3057\u3066\u307f\u307e\u3057\u3087\u3046<\/p>\n
[bash]
\nquery GetProduct{
\n  getProduct(id: 2){
\n    id
\n    product_name
\n    price
\n  }
\n}<\/p>\n
[\/bash]<\/p>\n
\"Screenshot<\/a><\/p>\n
\u5546\u54c1\u30c7\u30fc\u30bf\u3092N\u4ef6\u30ea\u30fc\u30c9\u3059\u308b<\/h4>\n
1\u4ef6\u306e\u30c7\u30fc\u30bf\u306f\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u305f\u306e\u3067\u3001\u4eca\u5ea6\u306fproducts\u30c6\u30fc\u30d6\u30eb\u306eN\u4ef6\u306e\u30ec\u30b3\u30fc\u30c9\u3092\u53d6\u5f97\u3059\u308b
\nQuery\u3092\u5b9a\u7fa9\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002(getProducts)
\n\u623b\u308a\u5024\u306f ProductConnection  \u3067\u3001\u305d\u306e\u4e2d\u306b Product\u578b\u3068Boolean\u578b\u306ehas_more\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
[bash]
\n$ nano schema.js<\/p>\n
[\/bash]<\/p>\n
[bash]
\nimport { gql } from “apollo-server”;
\nimport TimestampType from “.\/GraphQLTimestamp”;<\/p>\n
export default gql`
\n  scalar TimestampType
\n  type Query {
\n    getProduct(id: Int!): Product!
\n    getProducts(offset: Int!, limit: Int!): ProductConnection!
\n  }<\/p>\n
  type Mutation{
\n    registerProduct(mode: String!, id: Int!, product_name: String!, price: Int): Product!
\n  }<\/p>\n
  type Product {
\n    id: Int!
\n    product_name: String!
\n    price: Int!
\n  }<\/p>\n
  type ProductConnection {
\n    products: [Product!]
\n    has_more: Boolean!
\n  }
\n`;<\/p>\n
[\/bash]<\/p>\n
[bash]
\n$ nano resolvers.js
\n[\/bash]<\/p>\n
[bash]
\nimport { ForbiddenError } from ‘apollo-server’;<\/p>\n
export default {
\n  Query: {
\n    getProduct: async(_, {id}, {dataSources}) => {
\n      return await dataSources.productAPI.findOne({id})
\n    },
\n    getProducts: async(_, {offset, limit}, {dataSources}) => {
\n      return await dataSources.productAPI.findForList({offset, limit})
\n    },
\n  },<\/p>\n
  Mutation: {
\n    registerProduct: async(_, {mode, id, product_name, price}, {dataSources}) => {
\n      let rec ;
\n      if (mode === “ADD”){
\n        rec = await dataSources.productAPI.add({product_name, price});
\n      }
\n      else if (mode === “EDIT”){
\n        rec = await dataSources.productAPI.edit({id, product_name, price});
\n      }
\n      else {
\n        rec = await dataSources.productAPI.remove({id});
\n      }<\/p>\n
      return rec;
\n    },<\/p>\n
  }<\/p>\n
}<\/p>\n
[\/bash]<\/p>\n
\u30e2\u30c7\u30eb\u306b\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u3063\u3066\u304f\u308b\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n
[bash]
\n$ nano datasources\/product.js
\n[\/bash]<\/p>\n
[bash]
\n  async findForList({offset, limit}){
\n    const recs = await this.store.products.findAll({
\n      offset: offset,
\n      limit: limit,
\n    });<\/p>\n
    let has_more = false;
\n    if (recs.length === limit){
\n      has_more = true;
\n    }<\/p>\n
    return {products: recs, has_more: has_more};
\n  }
\n[\/bash]<\/p>\n
Playground\u3067\u30c7\u30fc\u30bf\u3092N\u4ef6\u53d6\u5f97\u3057\u3066\u307f\u308b<\/h3>\n
\u3053\u3093\u306a\u611f\u3058\u306b\u8868\u793a\u3055\u308c\u308c\u3070\u3001\u6210\u529f\u3067\u3059\u3002
\n[bash]
\nquery GetProducts {
\n  getProducts(offset:0 , limit:20){
\n    products{
\n      id
\n      product_name
\n      price
\n    }
\n    has_more
\n  }
\n}
\n[\/bash]<\/p>\n
\"Screenshot<\/a><\/p>\n
\u3053\u308c\u3067CRUD\u3068\u4e00\u89a7\u53d6\u5f97API\u304c\u3067\u304d\u305f\u306e\u3067\u3001\u6b21\u56de\u306f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\u306e\u5b9f\u88c5\u306b\u3064\u3044\u3066
\n\u8a18\u8ff0\u3092\u958b\u59cb\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u56de\u306b\u7d9a\u3044\u3066 \u3068\u308a\u3042\u3048\u305a\u3001GraphQL\u3092\u5229\u7528\u3067\u304d\u308b Apollo Server\u304c\u8d77\u52d5\u3067\u304d\u305f\u306e\u3067\u3001 GraphQL\u3092\u4f7f\u3063\u3066\u3001\u5546\u54c1\u30c6\u30fc\u30d6\u30eb(products)\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002 \u3053\u306e\u8a18\u4e8b\u306f\uff15\u56de\u306b\u5206\u3051\u3066\u9023\u8f09\u3059\u308b\u3001\u7b2c\uff12\u56de\u306e\u8a18\u4e8b\u3067\u3059\u3002 \u30fb\u7b2c\uff11\u56de Apollo Server\u304c\u52d5\u304f\u3068\u3053\u308d\u307e\u3067 \u30fb\u7b2c\uff12\u56de Apollo Server\u914d\u4e0b\u3067\u3001GraphQL\u3092\u4f7f\u3063\u3066\u5546\u54c1\u30de\u30b9\u30bf\u30fc\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\uff08\u3053\u306e\u8a18\u4e8b\uff09 \u30fb\u7b2c\uff13\u56de \u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u3092React\uff0bRedux\uff0bgraphql-request\u3092\u4f7f\u3063\u3066\u5b9f\u88c5\u3059\u308b \u30fb\u7b2c\uff14\u56de \u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u304b\u3089graphql-request\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u30fb\u8868\u793a\u3059\u308b \u30fb\u7b2c\uff15\u56de graphql-request\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30fc\u30bf\u3092\u767b\u9332\u30fb\u4fee\u6b63\u30fb\u524a\u9664\u3059\u308b \u5b8c\u6210\u30d5\u30a1\u30a4\u30eb\u30c4\u30ea\u30fc \u8aac\u660e\u304c\u308f\u304b\u308a\u306b\u304f\u3044\u3068\u601d\u3046\u306e\u3067\u3001\u5b8c\u6210\u5f62\u306e\u30d5\u30a1\u30a4\u30eb\u30c4\u30ea\u30fc\u3092\u793a\u3057\u3066\u304a\u304d\u307e\u3059\u3002 \u30c6\u30fc\u30d6\u30eb\u5b9a\u7fa9\uff08\u30b9\u30ad\u30fc\u30de\u4f5c\u6210\uff09 [bash] $ mkdir datasources [\/bash] \u5546\u54c1\u30c6\u30fc\u30d6\u30eb\u306e\u69cb\u9020\u306f id\/\u5546\u54c1\u540d\/\u91d1\u984d\u3000\u3060\u3051\u306e\u30b7\u30f3\u30d7\u30eb\u306a\u3082\u306e\u306b\u3057\u307e\u3059\u3002 [bash] $ nano datasources\/create_table.sql [\/bash] [bash] create table products ( id SERIAL, product_name TEXT, price INTEGER, “createdAt” timestamp with time zone, “updatedAt” timestamp with time zone, primary key (id)); [\/bash] \u30e2\u30c7\u30eb\u5b9a\u7fa9 \u5546\u54c1\u30c6\u30fc\u30d6\u30eb\u306e\u3000CRUD\u3092\u30c7\u30fc\u30bf\u30bd\u30fc\u30b9\uff08\u30e2\u30c7\u30eb\uff09\u306b\u5b9a\u7fa9\u3057\u307e\u3059\u3002 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30a2\u30af\u30bb\u30b9\u306b\u306f sequelize\u3092\u4f7f\u3044\u307e\u3059\u306e\u3067\u3001\u305d\u306e\u4f7f\u3044\u65b9\u306f\u3001\u5404\u81ea\u5b66\u3093\u3067\u304f\u3060\u3055\u3044\u306d\u3002 \uff08\u3053\u306e\u7a0b\u5ea6\u3060\u3068\u3001\u30bd\u30fc\u30b9\u3092\u898b\u305f\u307e\u307e\u30b7\u30f3\u30d7\u30eb\u306a\u3082\u306e\u3067\u3059\u304c\u30fb\u30fb\u30fb\uff09 [bash] $ nano datasources\/product.js [\/bash] [bash] import SQL from “sequelize”; import {DataSource } from “apollo-datasource”; class ProductAPI extends DataSource { constructor( {store} ) { super(); this.store = store; } initialize(config) { this.context = config.context; } async add({product_name, price}) { return await this.store.products.create({product_name: product_name, price: price}); } async findOne({id}) { return await this.store.products.findByPk(id); } async remove({id}) { const rec = await this.store.products.findByPk(id); const ret = await rec.destroy(); return {id:0, product_name: “”, price: 0}; } async edit({id, product_name, price}){ const rec = await this.store.products.findByPk(id); rec.product_name = product_name; rec.price = price; return await rec.save(); } } export default ProductAPI; [\/bash] index.js\u306e\u8abf\u6574 \u4f5c\u6210\u3057\u305f\u30e2\u30c7\u30eb\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u3001\u4ee5\u4e0b\u306e\uff11\u884c\u3092\u8ffd\u8a18\u3057\u307e\u3059\u3002 [bash] $ nano index.js [\/bash] [bash] const store = createStore(); import ProductAPI from “.\/datasources\/product”; { let rec ; if (mode === “ADD”){ rec = await dataSources.productAPI.add({product_name, price}); } else if (mode === “EDIT”){ rec = await dataSources.productAPI.edit({id, product_name, price}); } else { rec = await dataSources.productAPI.remove({id}); } return rec; }, } } [\/bash] \u5b9fDB \u306b create table \u3044\u3056\u3001\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3059\u308b\u524d\u306b Postgresql\u306b(mysql\u3067\u3082\u306a\u3093\u3067\u3082\u3044\u3044\u3067\u3059\u304c\u30fb\u30fb\u30fb\uff09 products \u30c6\u30fc\u30d6\u30eb\u3092 create table \u3057\u3066\u304f\u3060\u3055\u3044\u3002 [bash] create table products ( id SERIAL, product_name TEXT, price INTEGER, “createdAt” timestamp with time zone, “updatedAt” timestamp with time zone, primary key (id)); [\/bash] Apollo \u306e Playground\u3092\u4f7f\u3063\u3066\u3001\u30c7\u30fc\u30bf\u3092\u767b\u9332\u3057\u3066\u307f\u3088\u3046! \u3067\u306f\u3001\u5b9f\u969b\u306b\u5148\u7a0b\u4f5c\u3063\u305f schema.js\u3068resolver.js\u3068 product.js\uff08\u30e2\u30c7\u30eb\uff09\u3092 \u4f7f\u3063\u3066\u3000\u30c7\u30fc\u30bf\u3092\u767b\u9332\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01 \u767b\u9332\u3059\u308b\u30c7\u30fc\u30bf\u306f \u5546\u54c1\u540d \u4fa1\u683c ———————————- iPhone X Silver 87000 Garaxy S10 72000 Fujitsu \u3089\u304f\u3089\u304f\u30db\u30f3 59000 \u30d6\u30e9\u30a6\u30b6\u30fc\u3092\u8d77\u52d5\u3057\u3001http:\/\/localhost:4000\u3000\u3068\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \uff08\u305d\u306e\u524d\u306b npm start \u3082\u5fd8\u308c\u305a\u306b\uff09 \u3053\u3093\u306a\u753b\u9762\u304c\u51fa\u308c\u3070OK\u3067\u3059\u3002 \u5de6\u5074\u306b\u3001 GraphQL\u8a00\u8a9e\u3067\u30af\u30a8\u30ea\u3092\u8a18\u8ff0\u3057\u3066\u3001\u771f\u3093\u4e2d\u306e\u4e09\u89d2\u30dc\u30bf\u30f3\u3067\u5b9f\u884c\u3059\u308b\u3068\u3001\u7d50\u679c\u304c\u53f3\u5074\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002 \u5546\u54c1\u30c7\u30fc\u30bf\u306e\u767b\u9332 \u4ee5\u4e0b\u306e\uff13\u3064\u306e\u30af\u30a8\u30ea\uff08mutation)\u3092\u5b9f\u884c\u3057\u30c7\u30fc\u30bf\u3092\u767b\u9332\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002 [bash] mutation RegisterProduct { registerProduct(mode: “ADD”, id:0, product_name: “iPhone X Silver”, price: 87000){ id } } [\/bash] [bash]…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[77],"tags":[102,101,86],"class_list":{"0":"post-1896","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-react","7":"tag-apollo","8":"tag-graphql","9":"tag-react"},"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t