在一行中从 Drizzle 架构创建一个 GraphQL 服务器,并轻松地通过自定义查询和变更增强它。
确保你的 drizzle-orm 版本至少为 0.30.9,如果需要,请进行更新:
drizzle-orm
0.30.9
npm i drizzle-orm@latest
yarn add drizzle-orm@latest
pnpm add drizzle-orm@latest
bun add drizzle-orm@latest
npm i drizzle-graphql @apollo/server graphql
yarn add drizzle-graphql @apollo/server graphql
pnpm add drizzle-graphql @apollo/server graphql
bun add drizzle-graphql @apollo/server graphql
import { buildSchema } from 'drizzle-graphql'; import { drizzle } from 'drizzle-orm/...'; import client from './db'; import { ApolloServer } from '@apollo/server'; import { startStandaloneServer } from '@apollo/server/standalone'; import * as dbSchema from './schema'; const db = drizzle(client, { schema: dbSchema }); const { schema } = buildSchema(db); const server = new ApolloServer({ schema }); const { url } = await startStandaloneServer(server); console.log(`🚀 Server ready at ${url}`);
import { integer, serial, text, pgTable } from 'drizzle-orm/pg-core'; import { relations } from 'drizzle-orm'; export const users = pgTable('users', { id: serial('id').primaryKey(), name: text('name').notNull(), }); export const usersRelations = relations(users, ({ many }) => ({ posts: many(posts), })); export const posts = pgTable('posts', { id: serial('id').primaryKey(), content: text('content').notNull(), authorId: integer('author_id').notNull(), }); export const postsRelations = relations(posts, ({ one }) => ({ author: one(users, { fields: [posts.authorId], references: [users.id] }), }));
npm i drizzle-graphql graphql-yoga graphql
yarn add drizzle-graphql graphql-yoga graphql
pnpm add drizzle-graphql graphql-yoga graphql
bun add drizzle-graphql graphql-yoga graphql
import { buildSchema } from 'drizzle-graphql'; import { drizzle } from 'drizzle-orm/...'; import { createYoga } from 'graphql-yoga'; import { createServer } from 'node:http'; import * as dbSchema from './schema'; const db = drizzle({ schema: dbSchema }); const { schema } = buildSchema(db); const yoga = createYoga({ schema }); const server = createServer(yoga); server.listen(4000, () => { console.info('服务器已启动,地址为 http://localhost:4000/graphql'); });
buildSchema() 使用标准的 graphql SDK 生成架构和类型,因此其输出与支持该标准的任何库兼容。
buildSchema()
graphql
如果您想自定义您的架构,可以使用 entities 对象来构建自己的新架构:
entities
import { buildSchema } from 'drizzle-graphql'; import { drizzle } from 'drizzle-orm/...'; import { GraphQLList, GraphQLNonNull, GraphQLObjectType, GraphQLSchema } from 'graphql'; import { createYoga } from 'graphql-yoga'; import { createServer } from 'node:http'; import * as dbSchema from './schema'; const db = drizzle({ schema: dbSchema }); const { entities } = buildSchema(db); // 您可以自定义希望的查询或变更的部分 const schema = new GraphQLSchema({ query: new GraphQLObjectType({ name: 'Query', fields: { // 仅选择所有生成的查询中希望的查询 users: entities.queries.users, customer: entities.queries.customersSingle, // 创建自定义查询 customUsers: { // 您可以重用和自定义原始架构中的类型 type: new GraphQLList(new GraphQLNonNull(entities.types.UsersItem)), args: { // 您也可以重用输入 where: { type: entities.inputs.UsersFilters }, }, resolve: async (source, args, context, info) => { // 在这里添加自定义逻辑... const result = await db.select(schema.users).where()... return result; }, }, }, }), // 变更也适用相同的规则 mutation: new GraphQLObjectType({ name: 'Mutation', fields: entities.mutations, }), // 如果需要架构内的类型 types: [...Object.values(entities.types), ...Object.values(entities.inputs)], }); const yoga = createYoga({ schema, }); const server = createServer(yoga); server.listen(4000, () => { console.info('Server is running on http://localhost:4000/graphql'); })