代码

npm install graphql

var { graphql, buildSchema } = require("graphql")

var schema = buildSchema(`
  type Query {
    hello: String
  }
`)

var rootValue = { hello: () => "Hello world!" }

var source = "{ hello }"

graphql({ schema, source, rootValue }).then(response => {
  console.log(response)
})

npm install graphql-yoga graphql

import { createServer } from "http"
import { createSchema, createYoga } from "graphql-yoga"

createServer(
  createYoga({
    schema: createSchema({
      typeDefs: /* GraphQL */ `
        type Query {
          hello: String
        }
      `,
      resolvers: {
        Query: {
          hello: () => "Hello Hello Hello",
        },
      },
    }),
  })
).listen(4000, () => {
  console.info("GraphQL Yoga is listening on https://127.0.0.1:4000/graphql")
})

npm install fastify mercurius

const Fastify = require("fastify")
const mercurius = require("mercurius")

const schema = `
  type Query {
    hello(name: String): String!
  }
`

const resolvers = {
  Query: {
    hello: async (_, { name }) => `hello ${name || "world"}`,
  },
}

const app = Fastify()
app.register(mercurius, {
  schema,
  resolvers,
})

app.listen(3000)

// Call IT!
// curl 'https://127.0.0.1:3000/graphql' \
//  -H 'content-type: application/json' \
//  --data-raw '{"query":"{ hello(name:\"Marcurius\") }" }'

npm install @apollo/server graphql

import { ApolloServer } from "@apollo/server"
import { startStandaloneServer } from "@apollo/server/standalone"

const server = new ApolloServer({
  typeDefs,
  resolvers,
})

const { url } = await startStandaloneServer(server)

console.log(`🚀 Server ready at ${url}`)

npm install @graphql-box/core @graphql-box/server @graphql-box/client @graphql-box/request-parser @graphql-box/cache-manager @graphql-box/debug-manager @graphql-box/execute @graphql-box/helpers @cachemap/core @cachemap/reaper @cachemap/redis @cachemap/constants @cachemap/types

import Cachemap from "@cachemap/core"
import redis from "@cachemap/redis"
import reaper from "@cachemap/reaper"
import CacheManager from "@graphql-box/cache-manager"
import Client from "@graphql-box/client"
import DebugManager from "@graphql-box/debug-manager"
import Execute from "@graphql-box/execute"
import RequestParser from "@graphql-box/request-parser"
import Server from "@graphql-box/server"
import { makeExecutableSchema } from "@graphql-tools/schema"
import { performance } from "perf_hooks"
import { schemaResolvers, schemaTypeDefs } from "./schema"
import logger from "./logger"

const schema = makeExecutableSchema({
  typeDefs: schemaTypeDefs,
  resolvers: schemaResolvers,
})

const server = new Server({
  client: new Client({
    cacheManager: new CacheManager({
      cache: new Cachemap({
        name: "server-cache",
        reaper: reaper({ interval: 300000 }),
        store: redis(/* configure */),
      }),
      cascadeCacheControl: true,
      typeCacheDirectives: {
        // Add any type specific cache control directives in the format:
        // TypeName: "public, max-age=3",
      },
    }),
    debugManager: new DebugManager({
      environment: "server",
      log: (...args) => {
        logger.log(...args)
      },
      name: "SERVER",
      performance,
    }),
    requestManager: new Execute({ schema }),
    requestParser: new RequestParser({ schema }),
  }),
})

// Meanwhile... somewhere else in your code

app.use("api/graphql", graphqlServer.request())

npm install graphql-hooks

import { GraphQLClient, ClientContext } from "graphql-hooks"

const client = new GraphQLClient({
  url: "/graphql",
})

function App() {
  return (
    <ClientContext.Provider value={client}>
      {/* children */}
    </ClientContext.Provider>
  )
}

import { useQuery } from "graphql-hooks"

const HOMEPAGE_QUERY = `query HomePage($limit: Int) {
  users(limit: $limit) {
    id
    name
  }
}`

function MyComponent() {
  const { loading, error, data } = useQuery(HOMEPAGE_QUERY, {
    variables: {
      limit: 10,
    },
  })

  if (loading) return "Loading..."
  if (error) return "Something Bad Happened"

  return (
    <ul>
      {data.users.map(({ id, name }) => (
        <li key={id}>{name}</li>
      ))}
    </ul>
  )
}

npm install @graphql-box/core @graphql-box/client @graphql-box/request-parser @graphql-box/cache-manager @graphql-box/debug-manager @graphql-box/fetch-manager @graphql-box/helpers @cachemap/core @cachemap/reaper @cachemap/indexed-db @cachemap/constants @cachemap/types

import Cachemap from "@cachemap/core"
import indexedDB from "@cachemap/indexed-db"
import reaper from "@cachemap/reaper"
import CacheManager from "@graphql-box/cache-manager"
import Client from "@graphql-box/client"
import DebugManager from "@graphql-box/debug-manager"
import FetchManager from "@graphql-box/fetch-manager"
import RequestParser from "@graphql-box/request-parser"
import introspection from "./introspection-query"

const requestManager = new FetchManager({
  apiUrl: "/api/graphql",
  batchRequests: true,
  logUrl: "/log/graphql",
})

const client = new Client({
  cacheManager: new CacheManager({
    cache: new Cachemap({
      name: "client-cache",
      reaper: reaper({ interval: 300000 }),
      store: indexedDB(/* configure */),
    }),
    cascadeCacheControl: true,
    typeCacheDirectives: {
      // Add any type specific cache control directives in the format:
      // TypeName: "public, max-age=3",
    },
  }),
  debugManager: new DebugManager({
    environment: "client",
    log: (message, data, logLevel) => {
      requestManager.log(message, data, logLevel)
    },
    name: "CLIENT",
    performance: self.performance,
  }),
  requestManager,
  requestParser: new RequestParser({ introspection }),
})

// Meanwhile... somewhere else in your code

const { data, errors } = await client.request(queryOrMutation)

npm install --dev spectaql
# OR
yarn add -D spectaql

# Then generate your docs
npm run spectaql my-config.yml
# OR
yarn spectaql my-config.yml

import { rule, shield, and, or, not } from "graphql-shield"

// Rules

const isAuthenticated = rule({ cache: "contextual" })(
  async (parent, args, ctx, info) => {
    return ctx.user !== null
  }
)

const isAdmin = rule({ cache: "contextual" })(
  async (parent, args, ctx, info) => {
    return ctx.user.role === "admin"
  }
)

const isEditor = rule({ cache: "contextual" })(
  async (parent, args, ctx, info) => {
    return ctx.user.role === "editor"
  }
)

// Permissions

const permissions = shield({
  Query: {
    frontPage: not(isAuthenticated),
    fruits: and(isAuthenticated, or(isAdmin, isEditor)),
    customers: and(isAuthenticated, isAdmin),
  },
  Mutation: {
    addFruitToBasket: isAuthenticated,
  },
  Fruit: isAuthenticated,
  Customer: isAdmin,
})

// Server

const server = new GraphQLServer({
  typeDefs,
  resolvers,
  middlewares: [permissions],
  context: req => ({
    ...req,
    user: getUser(req),
  }),
})

const { ApolloServer } = require("apollo-server")
const { makeExecutableSchema } = require("@graphql-tools/schema")

const typeDefs = `
type Query {
  hello(name: String): String
  bye(name: String): String
}
`
const resolvers = {
  Query: {
    hello: (root, args, context, info) => {
      console.log(`3. resolver: hello`)
      return `Hello ${args.name ? args.name : "world"}!`
    },
    bye: (root, args, context, info) => {
      console.log(`3. resolver: bye`)
      return `Bye ${args.name ? args.name : "world"}!`
    },
  },
}

const logInput = async (resolve, root, args, context, info) => {
  console.log(`1. logInput: ${JSON.stringify(args)}`)
  const result = await resolve(root, args, context, info)
  console.log(`5. logInput`)
  return result
}

const logResult = async (resolve, root, args, context, info) => {
  console.log(`2. logResult`)
  const result = await resolve(root, args, context, info)
  console.log(`4. logResult: ${JSON.stringify(result)}`)
  return result
}

const schema = makeExecutableSchema({ typeDefs, resolvers })

const schemaWithMiddleware = applyMiddleware(schema, logInput, logResult)

const server = new ApolloServer({
  schema: schemaWithMiddleware,
})

await server.listen({ port: 8008 })

npm install microfiber
# OR
yarn add microfiber

import { Microfiber } from 'microfiber'

const introspectionQueryResults = {...}

const microfiber = new Microfiber(introspectionQueryResults)

// ...do some things to your schema with `microfiber`

const cleanedIntrospectonQueryResults = microfiber.getResponse()

import { ApolloServer } from "apollo-server"
import SchemaBuilder from "@giraphql/core"

const builder = new SchemaBuilder({})

builder.queryType({
  fields: t => ({
    hello: t.string({
      args: {
        name: t.arg.string({}),
      },
      resolve: (parent, { name }) => `hello, ${name || "World"}`,
    }),
  }),
})

new ApolloServer({
  schema: builder.toSchema({}),
}).listen(3000)

query {
  heroes(_layout:{type:table}) { # _layout arg not sent to service
    first
    last
  }
}

package main

import "github.com/andrewwphillips/eggql"

func main() {
    http.Handle("/graphql", eggql.New(struct{ Message string }{Message: "hello, world"}))
    http.ListenAndServe(":80", nil)
}

$ curl -XPOST -d '{"query": "{ message }"}' localhost:80/graphql

{
  "data": {
    "message": "hello, world"
  }
}

<?php

namespace AppEntity;

use ApiPlatformCoreAnnotationApiResource;
use DoctrineORMMapping as ORM;

/**
 * Greet someone!
 *
 * @ApiResource
 * @ORMEntity
 */
class Greeting
{
    /**
     * @ORMId
     * @ORMColumn(type="guid")
     */
    public $id;

    /**
     * @var string Your nice message
     *
     * @ORMColumn
     */
    public $hello;
}

type Query {
  hello: String
}

<?php
declare(strict_types=1);
require_once '/path/to/vendor/autoload.php';

use SilerDiactoros;
use SilerGraphql;
use SilerHttp;

$typeDefs = file_get_contents(__DIR__.'/schema.graphql');
$resolvers = [
    'Query' => [
        'hello' => 'world',
    ],
];
$schema = Graphqlschema($typeDefs, $resolvers);

echo "Server running at http://127.0.0.1:8080";

Httpserver(Graphqlpsr7($schema), function (Throwable $err) {
    var_dump($err);
    return Diactorosjson([
        'error'   => true,
        'message' => $err->getMessage(),
    ]);
})()->run();

class ProductController
{
    /**
     * @Query()
     */
    public function product(string $id): Product
    {
        // Some code that looks for a product and returns it.
    }
}

/**
 * @Type()
 */
class Product
{
    /**
     * @Field()
     */
    public function getName(): string
    {
        return $this->name;
    }
    // ...
}

import graphql.ExecutionResult;
import graphql.GraphQL;
import graphql.schema.GraphQLSchema;
import graphql.schema.StaticDataFetcher;
import graphql.schema.idl.RuntimeWiring;
import graphql.schema.idl.SchemaGenerator;
import graphql.schema.idl.SchemaParser;
import graphql.schema.idl.TypeDefinitionRegistry;

import static graphql.schema.idl.RuntimeWiring.newRuntimeWiring;

public class HelloWorld {

    public static void main(String[] args) {
        String schema = "type Query{hello: String}";

        SchemaParser schemaParser = new SchemaParser();
        TypeDefinitionRegistry typeDefinitionRegistry = schemaParser.parse(schema);

        RuntimeWiring runtimeWiring = newRuntimeWiring()
                .type("Query", builder -> builder.dataFetcher("hello", new StaticDataFetcher("world")))
                .build();

        SchemaGenerator schemaGenerator = new SchemaGenerator();
        GraphQLSchema graphQLSchema = schemaGenerator.makeExecutableSchema(typeDefinitionRegistry, runtimeWiring);

        GraphQL build = GraphQL.newGraphQL(graphQLSchema).build();
        ExecutionResult executionResult = build.execute("{hello}");

        System.out.println(executionResult.getData().toString());
        // Prints: {hello=world}
    }
}

// build.gradle.kts
implementation("com.expediagroup", "graphql-kotlin-spring-server", latestVersion)

graphql:
  packages:
    - "com.your.package"

@Component
class HelloWorldQuery : Query {
  fun helloWorld() = "Hello World!!!"
}

type Query {
  helloWorld: String!
}

@Controller
public class GreetingController {

    @QueryMapping
    public String hello() {
        return "Hello, world!";
    }

}

data class Article(val id: Int, val text: String)

fun main() {
    val schema = KGraphQL.schema {
        query("article") {
            resolver { id: Int?, text: String ->
                Article(id ?: -1, text)
            }
        }
        type<Article> {
            property<String>("fullText") {
                resolver { article: Article ->
                    "${article.id}: ${article.text}"
                }
            }
        }
    }

    schema.execute("""
        {
            article(id: 5, text: "Hello World") {
                id
                fullText
            }
        }
    """).let(::println)
}

fun Application.module() {
  install(GraphQL) {
    playground = true
    schema {
      query("hello") {
        resolver { -> "World!" }
      }
    }
  }
}

query basicMapValue($userIds: [Int]) {
  userInfoList(userIds: $userIds) {
    id
    age
    firstName
    lastName
    fullName: stringHolder @map(mapper: "firstName + lastName")
  }
}

query filterUserByAge($userId: [Int]) {
  userInfoList(userIds: $userId) @filter(predicate: "age>=18") {
    userId
    age
    firstName
    lastName
  }
}

query parseFetchedValueToAnotherFieldArgumentMap($itemIds: [Int]) {
  itemList(itemIds: $itemIds) {
    # save sellerId as List<Long> with unique name "sellerIdList"
    sellerId @fetchSource(name: "sellerIdList")
    name
    saleAmount
    salePrice
  }

  userInfoList(userIds: 1)
    # transform the argument of "userInfoList" named "userIds" according to expression "sellerIdList" and expression argument,
    # which mean replace userIds value by source named "sellerIdList"
    @argumentTransform(
      argumentName: "userIds"
      operateType: MAP
      expression: "sellerIdList"
      dependencySources: ["sellerIdList"]
    ) {
    userId
    name
    age
  }
}

// build.gradle.kts
import com.expediagroup.graphql.plugin.gradle.graphql

plugins {
    id("com.expediagroup.graphql") version $latestGraphQLKotlinVersion
}

dependencies {
  implementation("com.expediagroup:graphql-kotlin-spring-client:$latestGraphQLKotlinVersion")
}

graphql {
    client {
        // target GraphQL endpoint
        endpoint = "https://127.0.0.1:8080/graphql"
        // package for generated client code
        packageName = "com.example.generated"
    }
}

query HelloWorldQuery {
  helloWorld
}

package com.example.generated

import com.expediagroup.graphql.client.types.GraphQLClientRequest
import kotlin.String
import kotlin.reflect.KClass

const val HELLO_WORLD_QUERY: String = "query HelloWorldQuery {\n    helloWorld\n}"

class HelloWorldQuery: GraphQLClientRequest<HelloWorldQuery.Result> {
    override val query: String = HELLO_WORLD_QUERY

    override val operationName: String = "HelloWorldQuery"

    override fun responseType(): KClass<HelloWorldQuery.Result> = HelloWorldQuery.Result::class

    data class Result(
        val helloWorld: String
    }
}

package com.example.client

import com.expediagroup.graphql.client.spring.GraphQLWebClient
import com.expediagroup.graphql.generated.HelloWorldQuery
import kotlinx.coroutines.runBlocking

fun main() {
    val client = GraphQLWebClient(url = "https://127.0.0.1:8080/graphql")
    runBlocking {
        val helloWorldQuery = HelloWorldQuery()
        val result = client.execute(helloWorldQuery)
        println("hello world query result: ${result.data?.helloWorld}")
    }
}

using System;
using System.Threading.Tasks;
using GraphQL;
using GraphQL.Types;
using GraphQL.SystemTextJson; // First add PackageReference to GraphQL.SystemTextJson

public class Program
{
  public static async Task Main(string[] args)
  {
    var schema = Schema.For(@"
      type Query {
        hello: String
      }
    ");

    var json = await schema.ExecuteAsync(_ =>
    {
      _.Query = "{ hello }";
      _.Root = new { Hello = "Hello World!" };
    });

    Console.WriteLine(json);
  }
}

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;

WebHost
    .CreateDefaultBuilder(args)
    .ConfigureServices(services =>
        services
            .AddGraphQLServer()
            .AddQueryType<Query>())
    .Configure(builder =>
        builder
            .UseRouting()
            .UseEndpoints(e => e.MapGraphQL()))
    .Build()
    .Run();

public class Query
{
    public Hero GetHero() => new Hero();
}

public class Hero
{
    public string Name => "Luke Skywalker";
}

// expose an exisiting data model with ASP.NET & EF Core
public class Startup {
  public void ConfigureServices(IServiceCollection services)
  {
      services.AddDbContext<DemoContext>();
      // Auto build a schema from DemoContext. Alternatively you can build one from scratch
      services.AddGraphQLSchema<DemoContext>(options =>
      {
          // modify the schema (add/remove fields or types), add other services
      });
  }

  public void Configure(IApplicationBuilder app, DemoContext db)
  {
      app.UseRouting();
      app.UseEndpoints(endpoints =>
      {
          // defaults to /graphql endpoint
          endpoints.MapGraphQL<DemoContext>();
      });
  }
}

client.GetHero
    .Watch(ExecutionStrategy.CacheFirst)
    .Subscribe(result =>
    {
        Console.WriteLine(result.Data.Name);
    })

var userId = 10;
var response = await qlClient.Query(q => q
    .User(userId, o => new
    {
        o.Id,
        o.FirstName,
        o.LastName
    }));

pip install graphene

import graphene

class Query(graphene.ObjectType):
  hello = graphene.String(name=graphene.String(default_value="World"))

  def resolve_hello(self, info, name):
    return 'Hello ' + name

schema = graphene.Schema(query=Query)
result = schema.execute('{ hello }')
print(result.data['hello']) # "Hello World"

pip install strawberry-graphql

import strawberry

@strawberry.type
class Query:
    @strawberry.field
    def hello(self, name: str = "World") -> str:
        return f"Hello {name}"

schema = strawberry.Schema(query=Query)

$ pip install ariadne

from ariadne import ObjectType, gql, make_executable_schema
from ariadne.asgi import GraphQL

type_defs = gql(
    """
    type Query {
        hello: String!
    }
    """
)

query_type = ObjectType("Query")

@query_type.field("hello")
def resolve_hello(*_):
    return "Hello world!"

schema = make_executable_schema(type_defs, query_type)

app = GraphQL(schema, debug=True)

$ pip install uvicorn
$ uvicorn example:app

pip install tartiflette

import asyncio
from tartiflette import Engine, Resolver
@Resolver("Query.hello")
async def resolver_hello(parent, args, ctx, info):
    return "hello " + args["name"]
async def run():
    tftt_engine = Engine("""
    type Query {
        hello(name: String): String
    }
    """)
    result = await tftt_engine.execute(
        query='query { hello(name: "Chuck") }'
    )
    print(result)
    # {'data': {'hello': 'hello Chuck'}}
if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(run())