如何为MySQL模型创buildGraphQL模式？

我在mysql中有以下表格。

用户

CREATE TABLE users( id INTEGER AUTO_INCREMENT PRIMARY KEY, username VARCHAR(255) UNIQUE NOT NULL, email VARCHAR(255) UNIQUE NOT NULL, password VARCHAR(100) NOT NULL, created_at TIMESTAMP DEFAULT NOW() ); 

和post

 CREATE TABLE posts( id INTEGER AUTO_INCREMENT PRIMARY KEY, created_by INTEGER NOT NULL, created_at TIMESTAMP DEFAULT NOW(), post_title VARCHAR(100) NOT NULL UNIQUE, post_body VARCHAR(255) NOT NULL, slug VARCHAR(100) NOT NULL UNIQUE, FOREIGN KEY (created_by) REFERENCES users(id) ); 

我正在使用nodejs和mysql npm软件包。 我怎样才能使模型的graphQL模式？

我搜查了很多，但没有find任何解决办法。 大多数人正在使用sequelize这个目的。 比mysql包好吗？

Answer 1

是的你可以使用sequelize orm来连接graphql到Mysql数据库

参考： – http://docs.sequelizejs.com/manual/installation/getting-started

示例架构和parsing器给出

Schema.js

 const typeDefinitions = ` type Author { authorId: Int firstName: String lastName: String posts: [Post] } type Post { postId: Int title: String text: String views: Int author: Author } input postInput{ title: String text: String views: Int } type Query { author(firstName: String, lastName: String): [Author] posts(postId: Int, title: String, text: String, views: Int): [Post] } type Mutation { createAuthor(firstName: String, lastName: String, posts:[postInput]): Author updateAuthor(authorId: Int, firstName: String, lastName: String, posts:[postInput]): String } schema { query: Query mutation:Mutation } `; export default [typeDefinitions]; 

connectors.js

 import rp from 'request-promise'; var Sequelize = require('sequelize'); var db = new Sequelize('test', 'postgres', 'postgres', { host: '192.168.1.168', dialect: 'postgres', pool: { max: 5, min: 0, idle: 10000 } }); const AuthorModel = db.define('author', { authorId: { type: Sequelize.INTEGER, primaryKey: true, autoIncrement: true, field: "author_id" }, firstName: { type: Sequelize.STRING, field: "first_name" }, lastName: { type: Sequelize.STRING, field: "last_name" }, },{ freezeTableName: false, timestamps: false, underscored: false, tableName: "author" }); const PostModel = db.define('post', { postId: { type: Sequelize.INTEGER, primaryKey: true, autoIncrement: true, field: "post_id" }, text: { type: Sequelize.STRING }, title: { type: Sequelize.STRING }, views: { type: Sequelize.INTEGER }, },{ freezeTableName: false, timestamps: false, underscored: false, tableName: "post" }); AuthorModel.hasMany(PostModel, { foreignKey: 'author_id' }); PostModel.belongsTo(AuthorModel, { foreignKey: 'author_id' }); const Author = db.models.author; const Post = db.models.post; export { Author, Post }; 

resolver.js

 import { Author } from './connectors'; import { Post } from './connectors'; const resolvers = { Query: { author(_, args) { return Author.findAll({ where: args }); }, posts(_, args) { return Post.findAll({ where: args }); } }, Mutation: { createAuthor(_, args) { console.log(args) return Author.create(args, { include: [{ model: Post, }] }); }, updateAuthor(_, args) { var updateProfile = { title: "name here" }; console.log(args.authorId) var filter = { where: { authorId: args.authorId }, include: [ { model: Post } ] }; Author.findOne(filter).then(function (product) { Author.update(args, { where: { authorId: args.authorId } }).then(function (result) { product.posts[0].updateAttributes(args.posts[0]).then(function (result) { //return result; }) }); }) return "updated"; }, }, Author: { posts(author) { return author.getPosts(); }, }, Post: { author(post) { return post.getAuthor(); }, }, }; export default resolvers;