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@nestjs/graphql
Advanced tools
@nestjs/graphql is a module for NestJS that provides integration with GraphQL. It allows developers to build GraphQL APIs using the NestJS framework, leveraging its powerful features like dependency injection, modular architecture, and decorators.
Schema First Approach
In the schema-first approach, you define your GraphQL schema using the SDL (Schema Definition Language) and then implement the resolvers in your code. This approach is useful for teams that prefer to start with the schema design.
const { GraphQLModule } = require('@nestjs/graphql');
const { join } = require('path');
@Module({
imports: [
GraphQLModule.forRoot({
typePaths: ['./**/*.graphql'],
}),
],
})
export class AppModule {}
Code First Approach
In the code-first approach, you define your GraphQL schema using TypeScript decorators and classes. This approach is useful for teams that prefer to start with the implementation and generate the schema automatically.
const { GraphQLModule } = require('@nestjs/graphql');
const { join } = require('path');
@ObjectType()
class User {
@Field()
id: number;
@Field()
name: string;
}
@Resolver(of => User)
class UserResolver {
@Query(returns => User)
getUser() {
return { id: 1, name: 'John Doe' };
}
}
@Module({
imports: [
GraphQLModule.forRoot({
autoSchemaFile: join(process.cwd(), 'src/schema.gql'),
}),
],
providers: [UserResolver],
})
export class AppModule {}
Resolvers
Resolvers are used to define the logic for fetching data for your GraphQL queries. In this example, a simple resolver is created to return a 'Hello World!' string.
const { Resolver, Query } = require('@nestjs/graphql');
@Resolver('User')
class UserResolver {
@Query(() => String)
sayHello() {
return 'Hello World!';
}
}
@Module({
providers: [UserResolver],
})
export class AppModule {}
Mutations
Mutations are used to modify data on the server. In this example, a mutation is created to handle the creation of a new user.
const { Resolver, Mutation, Args } = require('@nestjs/graphql');
@Resolver('User')
class UserResolver {
@Mutation(() => Boolean)
createUser(@Args('name') name: string) {
// Logic to create a user
return true;
}
}
@Module({
providers: [UserResolver],
})
export class AppModule {}
Apollo Server is a community-driven, open-source GraphQL server that works with any GraphQL schema. It is highly flexible and can be used with various Node.js frameworks. Compared to @nestjs/graphql, Apollo Server is more general-purpose and not tied to a specific framework like NestJS.
GraphQL Yoga is a fully-featured GraphQL server with focus on easy setup, performance, and great developer experience. It is built on top of Express and Apollo Server. While @nestjs/graphql is tightly integrated with NestJS, GraphQL Yoga offers a more standalone solution.
TypeGraphQL is a library that allows you to create GraphQL APIs using TypeScript classes and decorators. It is similar to the code-first approach in @nestjs/graphql but is framework-agnostic, meaning it can be used with any Node.js framework or even standalone.
A progressive Node.js framework for building efficient and scalable server-side applications, heavily inspired by Angular.
GraphQL (Apollo) module for Nest.
$ npm i --save @nestjs/graphql apollo-server-express graphql
Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please read more here.
Nest is MIT licensed.
FAQs
Nest - modern, fast, powerful node.js web framework (@graphql)
The npm package @nestjs/graphql receives a total of 515,764 weekly downloads. As such, @nestjs/graphql popularity was classified as popular.
We found that @nestjs/graphql demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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